From w4wsz at embarqmail.com Sat Mar 7 12:12:00 2015 From: w4wsz at embarqmail.com (Bob) Date: Sat, 7 Mar 2015 12:12:00 -0500 Subject: [AMRadio] WTB Remote Switch Message-ID: <000e01d058f9$d363abd0$7a2b0370$@embarqmail.com> If anyone has a 4 position remote antenna switch (Ameritron) they would like to sell, please let me know. Thanks, Bob --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com From w5jo at brightok.net Sat Mar 14 22:39:53 2015 From: w5jo at brightok.net (Jim Wilhite) Date: Sat, 14 Mar 2015 21:39:53 -0500 Subject: [AMRadio] Fw: ARLB011 ARRL Seeks Member Input on Draft HF Band Plan Proposals Message-ID: <68334170EE55469E97D35ED47097270F@JimPC> I am reposting this so you do not forget about the subject. Jim W5JO -----Original Message----- From: ARRL Web site Sent: Thursday, February 26, 2015 1:33 PM To: w5jo at brightok.net Subject: ARLB011 ARRL Seeks Member Input on Draft HF Band Plan Proposals SB QST @ ARL $ARLB011 ARLB011 ARRL Seeks Member Input on Draft HF Band Plan Proposals ZCZC AG11 QST de W1AW ARRL Bulletin 11 ARLB011 >From ARRL Headquarters Newington CT February 26, 2015 To all radio amateurs SB QST ARL ARLB011 ARLB011 ARRL Seeks Member Input on Draft HF Band Plan Proposals The ARRL is asking members to comment by April 19 on possible changes to the League's HF Band Plans suggested by the HF Band Planning Committee. The survey is part of the committee's efforts to tweak the band plans for the RTTY/data/CW portions of 80 through 10 meters - excepting 60 meters. The committee developed its suggested revisions to the voluntary band plans after reviewing some 400 member comments in response to a March 2014 solicitation that sought suggestions for using the spectrum more efficiently so that data modes may coexist compatibly. "The committee concluded that most of the concerns voiced by members could be addressed by modest adjustments to the existing band plans, and mainly by confining data modes with bandwidths greater than 500 Hz to the FCC-designated segments for automatically controlled digital stations (ACDS) and to parts of the RTTY/data subbands above those segments," ARRL CEO David Sumner, K1ZZ said. His article detailing the committee's suggestions will appear in the April edition of QST. The proposed changes differentiate among ACDS, narrow RTTY/data modes having a bandwidth no greater than 500 Hz, and wider data modes having a bandwidth up to 2700 Hz. Band by Band Draft Recommendations The committee suggests several modifications to the 80 meter band plan. FCC action in 2006 reduced the 80 meter RTTY/data subband to 100 kHz and limited access to the 3600-3700 kHz segment to Amateur Extra class licensees. "Unless and until the FCC Rules are modified, changes in the band plan for 3500-3600 kHz will not improve the situation," Sumner said. The HF Band Planning Committee recommends that the League petition the FCC to move the boundary between the 80 meter RTTY/data band and the 75 meter phone/image band from 3600 to 3650 kHz and restoring that segment to General and Advanced class licensees. Members are asked to comment on this proposal, as well as on whether or not the ARRL should petition the FCC for these other changes: * Shift the ACDS band segment from 3585-3600 to 3600-3615 kHz, consistent with the IARU Region 1 and 2 band plans. * Extend the current Novice/Technician CW segment of 3525-3600 kHz to 3650 kHz. * Add 80 meter RTTY/data privileges for Novices and Technicians. On 40 meters, the committee concluded that it would be unrealistic to try to bring the ARRL band plan into alignment with the rest of the world, particularly with Regions 1 and 3 where operating patterns developed when the entire band, including phone, was just 100 kHz wide and is still only 200 kHz. While 7040 kHz is a recognized RTTY/data DX frequency in the band plan, the best place for other RTTY/data activity in the US is above 7070 kHz. The committee proposes aligning the band plan with the "Considerate Operator's Frequency Guide," with wide data modes - outside of ACDS - at 7115-7125 kHz. The "Guide" shows 7070-7125 kHz for RTTY/data, while the ARRL band plan shows 7080-7125 kHz. The FCC mandates that ACDS be confined to the 7100-7105 kHz segment. On 30 meters, the committee recommends confining wide data modes to 10.140-10.150 MHz, separated from other RTTY/data at 10.130-10.140 MHz. On 20 meters, the committee recommends using the 1 kHz IARU/NCDXF beacon network frequency (14.0995-14.1005 MHz) as a line in the sand between wide ACDS in the 14.1005-14.112 MHz segment, and narrow ACDS in the 14.095-14.0995 MHz segment. The committee recommends 14.070-14.095 MHz for RTTY and narrowband data, noting that so-called "weak-signal" data modes often are used between 14.070 and 14.078 MHz. On 17 meters, the committee recommends confining wide data modes to the FCC-mandated ACDS segment of 18.105-18.110 MHz, separated from narrow RTTY/data at 18.100-18.105 MHz. FCC rules do not permit RTTY/data above 18.110 MHz, limiting options for this band. On 15 meters, the committee recommends that 21.070-21.090 MHz for narrow RTTY/data modes, the FCC-mandated ACDS segment of 21.090-21.100 MHz for both narrow and wide automatically controlled data station activity, and above 21.100 MHz for any additional wide data activity. The ARRL Board also wants members to comment on the desirability of adding RTTY/data privileges for Novices and Technicians in their existing 15 meter segment, where they're now limited to CW. On 12 meters, the committee recommends confining wide data to the FCC-mandated ACDS segment, 24.925-24.930 MHz, separated from narrow RTTY/data operation at 24.920-24.925 MHz. FCC rules do not permit RTTY/data operation above 24.930 MHz, limiting options for this band. On 10 meters, the committee recommends that wide data be confined to the FCC-mandated ACDS segment, 28.120-28.189 MHz, separated from narrow RTTY/data modes at 28.070-28.120 MHz. How to Comment The League has set up a web page to record members' preferences and comments at, http://www.arrl.org/bandplan . Those wishing to offer more detailed comments may e-mail ARRL at, bandplan at arrl.org . The comment deadline is April 19. The HF Band Planning Committee will deliver its final report at the ARRL Board of Directors' July meeting. NNNN /EX From ranchorobbo at gmail.com Tue Mar 17 14:42:47 2015 From: ranchorobbo at gmail.com (Rob Atkinson) Date: Tue, 17 Mar 2015 13:42:47 -0500 Subject: [AMRadio] big sun storm Message-ID: http://lists.radiolists.net/pipermail/broadcast/2015-March/160111.html Rob K5UJ From kenw8ek at gmail.com Tue Mar 17 18:58:23 2015 From: kenw8ek at gmail.com (Ken Simpson, W8EK) Date: Tue, 17 Mar 2015 18:58:23 -0400 Subject: [AMRadio] DTMF Touch Tone Microphones FS Message-ID: <5508B18F.4070704@gmail.com> DTMF Touch Tone Microphones For Sale: - Icom HM-14 DTMF Mic: The Icom HM-14 has the standard round 8 pin connector as used by most Icom radios. It has a 16 digit DTMF Touch Tone pad on the back. It will work with the IC-25A, 229, 271, 718, 725, 728, 746, 751, 756/PRO, 761, 765, 781, 820H, 901, 3200, 3210, and others. This one has good audio quality, all 16 digits on the DTMF pad work like they should, and the coiled cord is in extremely good shape. $40 - CES 810 L DTMF Mic One can manually dial a number, or automatically store it in the mic, and "speed dial". It has a 12 digit touch tone pad on the front. With 8 pin modular plug (like computer LAN). It looks to be unused. $38 - Johnson 250-0761-010 / CES 655 L DTMF Mic It has a 12 digit pad on the front, and is a rugged mic. Presently with 4 pin connector. It looks to be unused. $38 - Prices do not include shipping from Florida. - Thanks. 73, Ken Simpson, W8EK Phone (352) 732-8400 . From rbethman at comcast.net Tue Mar 17 20:40:46 2015 From: rbethman at comcast.net (rbethman) Date: Tue, 17 Mar 2015 20:40:46 -0400 Subject: [AMRadio] Solar warning Message-ID: <5508C98E.8090109@comcast.net> Direct from NOAA: :Product: NOAA 3-day Geomagnetic Forecasts :Issued: 2015 Mar 17 2200 UTC # Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center # NOAA Ap Index Forecast Observed Ap 16 Mar 011 Estimated Ap 17 Mar 119 Predicted Ap 18 Mar-20 Mar 035-018-008 NOAA Geomagnetic Activity Probabilities 18 Mar-20 Mar Active 25/35/20 Minor storm 30/20/05 Moderate storm 35/05/01 Strong-Extreme storm 05/01/01 NOAA Kp index forecast 18 Mar - 20 Mar Mar 18 Mar 19 Mar 20 00-03UT 6 4 2 03-06UT 6 3 2 06-09UT 5 3 2 09-12UT 4 3 2 12-15UT 3 3 2 15-18UT 3 3 2 18-21UT 3 3 2 21-00UT 3 4 2 Southern KY and TN should be able to see Aurora. Bob - N0DGN From amradio at mailman.qth.net Tue Mar 17 21:39:53 2015 From: amradio at mailman.qth.net (CL in NC via AMRadio) Date: Tue, 17 Mar 2015 18:39:53 -0700 Subject: [AMRadio] Band plan comments Message-ID: <1426642793.70628.YahooMailBasic@web160605.mail.bf1.yahoo.com> Seeing how the ARRL has received 400 comments out of 710,000 hams, and 540,000 hams don't belong to the ARRL, commenting and commenting often may be in order. Charlie, W4MEC in NC From rbethman at comcast.net Wed Mar 18 11:58:43 2015 From: rbethman at comcast.net (rbethman) Date: Wed, 18 Mar 2015 11:58:43 -0400 Subject: [AMRadio] Solar Alert Message-ID: <5509A0B3.2060504@comcast.net> Space Weather Message Code: ALTEF3 Serial Number: 2160 Issue Time: 2015 Mar 18 1534 UTC ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Threshold Reached: 2015 Mar 18 1515 UTC Station: GOES-13 NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. From paul at paulbaldock.com Thu Mar 19 13:45:25 2015 From: paul at paulbaldock.com (Paul Baldock) Date: Thu, 19 Mar 2015 10:45:25 -0700 Subject: [AMRadio] 813 Final Problem In-Reply-To: <5509A0B3.2060504@comcast.net> References: <5509A0B3.2060504@comcast.net> Message-ID: I am building a 15 meter 2 x 813 class C final. HV is 2200V. With 16mA grid drive I can comfortably get 400W (and more) out. Every thing works fine until I insert the Mod transformer secondary in the HV lead to the PA. NOTHING is connected to the input (audio) side of the transformer. When I apply rf drive to the PA my High Voltage connectors arc over. It seems this must be caused by some sort of inductive spike. Any suggestions? - Paul KW7Y --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com From Tonne at Comcast.net Thu Mar 19 14:08:35 2015 From: Tonne at Comcast.net (Jim Tonne) Date: Thu, 19 Mar 2015 14:08:35 -0400 Subject: [AMRadio] 813 Final Problem In-Reply-To: <20150319174549.8CB27149AF63@mailman.qth.net> References: <5509A0B3.2060504@comcast.net> <20150319174549.8CB27149AF63@mailman.qth.net> Message-ID: <550B10A3.2020108@Comcast.net> Assuming you don't have an actual modulator connected yet, only the modulation transformer, short the modulation transformer primary. Of course when you get the modulator running later some time, be sure to remove the short :-) - Jim Tonne W4ENE On 3/19/2015 1:45 PM, Paul Baldock wrote: > > I am building a 15 meter 2 x 813 class C final. HV is 2200V. With 16mA > grid drive I can comfortably get 400W (and more) out. > > Every thing works fine until I insert the Mod transformer secondary in > the HV lead to the PA. NOTHING is connected to the input (audio) side > of the transformer. When I apply rf drive to the PA my High Voltage > connectors arc over. It seems this must be caused by some sort of > inductive spike. Any suggestions? > > - Paul KW7Y > > From deswynar at xplornet.ca Thu Mar 19 14:13:25 2015 From: deswynar at xplornet.ca (Eddy Swynar) Date: Thu, 19 Mar 2015 14:13:25 -0400 Subject: [AMRadio] 813 Final Problem In-Reply-To: <550B10A3.2020108@Comcast.net> References: <5509A0B3.2060504@comcast.net> <20150319174549.8CB27149AF63@mailman.qth.net> <550B10A3.2020108@Comcast.net> Message-ID: <4504327C-207D-4232-850C-2371FD0B32AD@xplornet.ca> Hi Jim, I believe you're to short the SECONDARY of the mod transformer in CW, and NOT the primary side. ~73~ de Eddy VE3CUI - VE3XZ On 2015-03-19, at 2:08 PM, Jim Tonne wrote: > > > > > > Assuming you don't have an actual modulator connected yet, > only the modulation transformer, short the modulation transformer > primary. > > Of course when you get the modulator running later some time, > be sure to remove the short :-) > > - Jim Tonne W4ENE > > > > On 3/19/2015 1:45 PM, Paul Baldock wrote: >> >> I am building a 15 meter 2 x 813 class C final. HV is 2200V. With 16mA grid drive I can comfortably get 400W (and more) out. >> >> Every thing works fine until I insert the Mod transformer secondary in the HV lead to the PA. NOTHING is connected to the input (audio) side of the transformer. When I apply rf drive to the PA my High Voltage connectors arc over. It seems this must be caused by some sort of inductive spike. Any suggestions? >> >> - Paul KW7Y >> >> > > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Archives: http://mailman.qth.net/pipermail/amradio/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio at mailman.qth.net > To unsubscribe, send an email to amradio-request at mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html From paul at paulbaldock.com Thu Mar 19 14:16:44 2015 From: paul at paulbaldock.com (Paul Baldock) Date: Thu, 19 Mar 2015 11:16:44 -0700 Subject: [AMRadio] 813 Final Problem In-Reply-To: <550B10A3.2020108@Comcast.net> References: <5509A0B3.2060504@comcast.net> <20150319174549.8CB27149AF63@mailman.qth.net> <550B10A3.2020108@Comcast.net> Message-ID: Are you suggesting the problem I am seeing is normal, and that it will go away once I connect the modulator tubes to the transformer primary? Did I make it clear that the arc is on the HV connector to the RF PA, not the HV connector to the (yet to be built) modulator? That side of the transformer is currently completely disconnected from everything. Thanks - Paul At 11:08 AM 3/19/2015, Jim Tonne wrote: >Assuming you don't have an actual modulator connected yet, >only the modulation transformer, short the modulation transformer >primary. > >Of course when you get the modulator running later some time, >be sure to remove the short :-) > >- Jim Tonne W4ENE > > > >On 3/19/2015 1:45 PM, Paul Baldock wrote: >> >>I am building a 15 meter 2 x 813 class C final. HV is 2200V. With >>16mA grid drive I can comfortably get 400W (and more) out. >> >>Every thing works fine until I insert the Mod transformer secondary >>in the HV lead to the PA. NOTHING is connected to the input (audio) >>side of the transformer. When I apply rf drive to the PA my High >>Voltage connectors arc over. It seems this must be caused by some >>sort of inductive spike. Any suggestions? >> >>- Paul KW7Y >> > >______________________________________________________________ >Our Main Website: http://www.amfone.net >AMRadio mailing list >Archives: http://mailman.qth.net/pipermail/amradio/ >List Rules (must read!): http://w5ami.net/amradiofaq.html >List Home: http://mailman.qth.net/mailman/listinfo/amradio >Post: AMRadio at mailman.qth.net >To unsubscribe, send an email to amradio-request at mailman.qth.net with >the word unsubscribe in the message body. > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com From Tonne at Comcast.net Thu Mar 19 14:19:10 2015 From: Tonne at Comcast.net (Jim Tonne) Date: Thu, 19 Mar 2015 14:19:10 -0400 Subject: [AMRadio] 813 Final Problem In-Reply-To: <4504327C-207D-4232-850C-2371FD0B32AD@xplornet.ca> References: <5509A0B3.2060504@comcast.net> <20150319174549.8CB27149AF63@mailman.qth.net> <550B10A3.2020108@Comcast.net> <4504327C-207D-4232-850C-2371FD0B32AD@xplornet.ca> Message-ID: <550B131E.2050101@Comcast.net> Eddy: Either way will work. What is happening is that when that RF amplifier is suddenly turned on, the large dV/dT generates a huge voltage across the secondary. The primary is closely coupled to that secondary and so the huge transient appearing across the secondary will also appear across the primary. As I said is probably easier but shorting either winding should work. Perhaps flip a coin :-) Heads its primary, tails secondary. - JimT W4ENE On 3/19/2015 2:13 PM, Eddy Swynar wrote: > */Hi Jim,/* > > I believe you're to short the /SECONDARY/of the mod transformer in CW, > and /NOT/the primary side. > > */~73~ de Eddy VE3CUI - VE3XZ/* > > > > > > On 2015-03-19, at 2:08 PM, Jim Tonne wrote: > >> >> >> >> >> >> Assuming you don't have an actual modulator connected yet, >> only the modulation transformer, short the modulation transformer >> primary. From Tonne at Comcast.net Thu Mar 19 15:28:47 2015 From: Tonne at Comcast.net (Jim Tonne) Date: Thu, 19 Mar 2015 15:28:47 -0400 Subject: [AMRadio] 813 Final Problem In-Reply-To: <550B10A3.2020108@Comcast.net> References: <5509A0B3.2060504@comcast.net> <20150319174549.8CB27149AF63@mailman.qth.net> <550B10A3.2020108@Comcast.net> Message-ID: <550B236F.1090308@Comcast.net> Paul: Yes indeed I understood the situation as you described. Turn on the high voltage and THEN key the RF amplifier on and off and all hell will break loose. Short the modulation transformer (temporarily) and the rig will be quite calm when you key the RF on and off. This same situation will occur when you have the same rig used for AM phone and CW. When in CW short out the modulation transformer. Even when the modulator tubes are installed be sure they have considerable standing (idling) current when the RF is keyed on and off or when you key the B+ on and off. Best to short the modulation transformer when you do that. - JimT W4ENE On 3/19/2015 2:16 PM, Paul Baldock wrote: > > Are you suggesting the problem I am seeing is normal, and that it will > go away once I connect the modulator tubes to the transformer primary? > > Did I make it clear that the arc is on the HV connector to the RF PA, > not the HV connector to the (yet to be built) modulator? That side of > the transformer is currently completely disconnected from everything. > > Thanks > > - Paul > From knjhanlon at msn.com Thu Mar 19 17:14:19 2015 From: knjhanlon at msn.com (JAMES HANLON) Date: Thu, 19 Mar 2015 15:14:19 -0600 Subject: [AMRadio] 813 Final Problem Message-ID: Paul, You are indeed experiencing an "inductive voltage spike" problem across the modulation transformer winding when you attempt to make an abrupt change in the amount of current flowing through the coil. The cure, at least for operating CW, is to put a short across the secondary winding of the modulation transformer. The physics behind what's happening goes like this. The relationship between the voltage, V, across an inductor, L, and the current flowing through the inductor, I, is expressed by the following formula. V = L (dI/dt) . "dI" is the instantaneous change in current in the amount of time, "dt." If you attempt to change from one current level to another, for example if you attempt to go from zero current to 100 ma, and you attempt to do it in one microsecond and through an inductance of 1 Henry, then a voltage spike would build up across that 1 Henry inductor of about V = 1 (0.1/.000001) = 100,000 volts. The polarity of that voltage spike would be such as to oppose the build up of current in the inductor, or in other words to drive the current in the opposite direction to the current change you were attempting to make. Obviously such a large spike would be enough to break down something in the circuit, in your case the insulator in your connector. The cure for CW operation is to switch a short across the modulation transformer secondary while operating CW. For phone you will of course have to open that short. The only time you may experience a problem during phone operation is when you are turning the carrier on at the beginning of a transmission and turning it off at the end. Too rapid a transition at either turn-on or turn-off would generate a voltage spike across the modulation transformer secondary that would break something down and cause an arc. Old-time transmitters, like the Johnson Viking I and Viking II for example, turned the high voltage power supply on and off with a switch in the transformer primary winding to switch the transmitter on and off for phone. Hope that helps, Jim, W8KGI From james.liles at comcast.net Thu Mar 19 21:09:36 2015 From: james.liles at comcast.net (james.liles at comcast.net) Date: Thu, 19 Mar 2015 20:09:36 -0500 Subject: [AMRadio] 813 Final Problem In-Reply-To: References: Message-ID: Hi Jim, It's when you open the circuit or stop current flow the huge voltages occur. A voltage applied with a 1us rise time into a 1hy winding will simply develop a back voltage equal to the applied. Stop it by opening a switch and it will develop whatever voltage necessary to arc the gap. Kindest regards Jim K9AXN -----Original Message----- From: JAMES HANLON Sent: Thursday, March 19, 2015 4:14 PM To: AMradio ; paul at paulbaldock.com Subject: [AMRadio] 813 Final Problem Paul, You are indeed experiencing an "inductive voltage spike" problem across the modulation transformer winding when you attempt to make an abrupt change in the amount of current flowing through the coil. The cure, at least for operating CW, is to put a short across the secondary winding of the modulation transformer. The physics behind what's happening goes like this. The relationship between the voltage, V, across an inductor, L, and the current flowing through the inductor, I, is expressed by the following formula. V = L (dI/dt) . "dI" is the instantaneous change in current in the amount of time, "dt." If you attempt to change from one current level to another, for example if you attempt to go from zero current to 100 ma, and you attempt to do it in one microsecond and through an inductance of 1 Henry, then a voltage spike would build up across that 1 Henry inductor of about V = 1 (0.1/.000001) = 100,000 volts. The polarity of that voltage spike would be such as to oppose the build up of current in the inductor, or in other words to drive the current in the opposite direction to the current change you were attempting to make. Obviously such a large spike would be enough to break down something in the circuit, in your case the insulator in your connector. The cure for CW operation is to switch a short across the modulation transformer secondary while operating CW. For phone you will of course have to open that short. The only time you may experience a problem during phone operation is when you are turning the carrier on at the beginning of a transmission and turning it off at the end. Too rapid a transition at either turn-on or turn-off would generate a voltage spike across the modulation transformer secondary that would break something down and cause an arc. Old-time transmitters, like the Johnson Viking I and Viking II for example, turned the high voltage power supply on and off with a switch in the transformer primary winding to switch the transmitter on and off for phone. Hope that helps, Jim, W8KGI ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Archives: http://mailman.qth.net/pipermail/amradio/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio at mailman.qth.net To unsubscribe, send an email to amradio-request at mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From paul at paulbaldock.com Fri Mar 20 18:15:37 2015 From: paul at paulbaldock.com (Paul Baldock) Date: Fri, 20 Mar 2015 15:15:37 -0700 Subject: [AMRadio] 813 Triode Connected Bias question. In-Reply-To: References: Message-ID: I am building a 2x813 pp triode connected modulator. This means the screen grid and control grid are connected together for each tube. I haven't found any characteristic curves for the 813 in this configuration On a sample of one, with 0 volts on the grid I measure about 40mA Idle Current (single tube). 40mA means about 100W per tube. Does anybody have a guess at what negative bias I would need to reduce this to around 20mA? Thanks - Paul KW7Y --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com From ars.w5omr at gmail.com Fri Mar 20 21:47:55 2015 From: ars.w5omr at gmail.com (ARS W5OMR) Date: Sat, 21 Mar 2015 01:47:55 +0000 Subject: [AMRadio] 813 Triode Connected Bias question. In-Reply-To: <20150320221600.0DBC5149B49B@mailman.qth.net> References: <20150320221600.0DBC5149B49B@mailman.qth.net> Message-ID: Hook up a 9v battery, reversed, in the center tap of the filament transformer secondary and put some voltage to it. If that's not enough, add another until you have too much voltage, then wire a pot across the batteries. I did this without the pot on a pair of 810's... I think I wound up with 5 or 6 9v batteries strung together for 45 or 50v of bias. On Mar 20, 2015 5:16 PM, "Paul Baldock" wrote: > I am building a 2x813 pp triode connected modulator. This means the screen > grid and control grid are connected together for each tube. > > I haven't found any characteristic curves for the 813 in this configuration > > On a sample of one, with 0 volts on the grid I measure about 40mA Idle > Current (single tube). 40mA means about 100W per tube. Does anybody have a > guess at what negative bias I would need to reduce this to around 20mA? > > Thanks > > - Paul KW7Y > > > --- > This email has been checked for viruses by Avast antivirus software. > http://www.avast.com > > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Archives: http://mailman.qth.net/pipermail/amradio/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio at mailman.qth.net > To unsubscribe, send an email to amradio-request at mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > From paul at paulbaldock.com Fri Mar 20 22:37:23 2015 From: paul at paulbaldock.com (Paul Baldock) Date: Fri, 20 Mar 2015 19:37:23 -0700 Subject: [AMRadio] 813 Triode Connected Bias question. In-Reply-To: References: <20150320221600.0DBC5149B49B@mailman.qth.net> Message-ID: I'm think it will be just a few volts for the 813 triode configuration. I could figure the voltage by putting a 1K pot in the center tap and adjusting it for 20mA, (this would allow 20V max). Then when I know the voltage, replace the pot with a zener or string of diodes with parallel electrolytic. - Paul >Hook up? a 9v battery,? reversed, in the >center tap of the filament transformer secondary >and put some voltage to it.? If that's not >enough, add another until you have too much >voltage, then wire a pot across the batteries. > >I did this without the pot on a pair of 810's... >I think I wound up with 5 or 6 9v batteries >strung together for 45 or 50v of bias. >On Mar 20, 2015 5:16 PM, "Paul Baldock" ><paul at paulbaldock.com> wrote: >I am building a 2x813 pp triode connected >modulator. This means the screen grid and >control grid are connected together for each tube. > >I haven't found any characteristic curves for the 813 in this configuration > >On a sample of one, with 0 volts on the grid I >measure about 40mA Idle Current (single tube). >40mA means about 100W per tube. Does anybody >have a guess at what negative bias I would need to reduce this to around 20mA? > >Thanks > >- Paul? KW7Y > > >--- >This email has been checked for viruses by Avast antivirus software. >http://www.avast.com > >______________________________________________________________ >Our Main Website: http://www.amfone.net >AMRadio mailing list >Archives: >http://mailman.qth.net/pipermail/amradio/ >List Rules (must read!): >http://w5ami.net/amradiofaq.html >List Home: >http://mailman.qth.net/mailman/listinfo/amradio >Post: AMRadio at mailman.qth.net >To unsubscribe, send an email to >amradio-request at mailman.qth.net with >the word unsubscribe in the message body. > >This list hosted by: http://www.qsl.net >Please help support this email list: >http://www.qsl.net/donate.html --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com From ranchorobbo at gmail.com Sat Mar 21 05:54:16 2015 From: ranchorobbo at gmail.com (Rob Atkinson) Date: Sat, 21 Mar 2015 04:54:16 -0500 Subject: [AMRadio] 813 Triode Connected Bias question. In-Reply-To: <20150321023748.7FEB5149AE26@mailman.qth.net> References: <20150320221600.0DBC5149B49B@mailman.qth.net> <20150321023748.7FEB5149AE26@mailman.qth.net> Message-ID: http://www.pentalabs.com/pdfs/pl813.pdf Rob K5UJ On Fri, Mar 20, 2015 at 9:37 PM, Paul Baldock wrote: > I'm think it will be just a few volts for the 813 triode configuration. > > I could figure the voltage by putting a 1K pot in the center tap and > adjusting it for 20mA, (this would allow 20V max). Then when I know the > voltage, replace the pot with a zener or string of diodes with parallel > electrolytic. > > - Paul From ne1s at securespeed.us Sat Mar 21 10:03:23 2015 From: ne1s at securespeed.us (Larry Szendrei) Date: Sat, 21 Mar 2015 10:03:23 -0400 Subject: [AMRadio] 813 Triode Connected Bias question. In-Reply-To: References: <20150320221600.0DBC5149B49B@mailman.qth.net> <20150321023748.7FEB5149AE26@mailman.qth.net> Message-ID: <550D7A2B.7060608@securespeed.us> On 3/21/15 5:54 AM, Rob Atkinson wrote: > http://www.pentalabs.com/pdfs/pl813.pdf > > > Rob > K5UJ > > On Fri, Mar 20, 2015 at 9:37 PM, Paul Baldock wrote: >> I'm think it will be just a few volts for the 813 triode configuration. >> >> I could figure the voltage by putting a 1K pot in the center tap and >> adjusting it for 20mA, (this would allow 20V max). Then when I know the >> voltage, replace the pot with a zener or string of diodes with parallel >> electrolytic. >> >> - Paul > Appreciate the link to that data sheet, Rob. Saved for future reference. However, there is no data for use in the triode class B connection, and that is what Paul is looking for. In the absence of that data I think his suggested approach of putting a pot in the cathode lead (center tap of fil. xfmr) to find the correct operating point and then replace with a Zener (or forward-biased diode string) of the correct value is a good one, and the one I would probably use. 73, -Larry/NE1S From qedconsultants at embarqmail.com Sat Mar 21 13:09:29 2015 From: qedconsultants at embarqmail.com (Bernie Doran) Date: Sat, 21 Mar 2015 13:09:29 -0400 Subject: [AMRadio] 813 Triode Connected Bias question. In-Reply-To: <550D7A2B.7060608@securespeed.us> References: <20150320221600.0DBC5149B49B@mailman.qth.net> <20150321023748.7FEB5149AE26@mailman.qth.net> <550D7A2B.7060608@securespeed.us> Message-ID: a simple internet search will show numerous triode connected 813s. Bernie W8RPW ----- Original Message ----- From: "Larry Szendrei" To: "Discussion of AM Radio in the Amateur Service" Sent: Saturday, March 21, 2015 10:03 AM Subject: Re: [AMRadio] 813 Triode Connected Bias question. > On 3/21/15 5:54 AM, Rob Atkinson wrote: >> http://www.pentalabs.com/pdfs/pl813.pdf >> >> >> Rob >> K5UJ >> >> On Fri, Mar 20, 2015 at 9:37 PM, Paul Baldock >> wrote: >>> I'm think it will be just a few volts for the 813 triode configuration. >>> >>> I could figure the voltage by putting a 1K pot in the center tap and >>> adjusting it for 20mA, (this would allow 20V max). Then when I know the >>> voltage, replace the pot with a zener or string of diodes with parallel >>> electrolytic. >>> >>> - Paul >> > Appreciate the link to that data sheet, Rob. Saved for future reference. > > However, there is no data for use in the triode class B connection, and > that is what Paul is looking for. > > In the absence of that data I think his suggested approach of putting a > pot in the cathode lead (center tap of fil. xfmr) to find the correct > operating point and then replace with a Zener (or forward-biased diode > string) of the correct value is a good one, and the one I would probably > use. > > 73, > -Larry/NE1S > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Archives: http://mailman.qth.net/pipermail/amradio/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio at mailman.qth.net > To unsubscribe, send an email to amradio-request at mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html From w4wsz at embarqmail.com Sat Mar 21 15:42:32 2015 From: w4wsz at embarqmail.com (Bob) Date: Sat, 21 Mar 2015 15:42:32 -0400 Subject: [AMRadio] 813 in use as triode Message-ID: <000601d0640f$2c7c1200$85743600$@embarqmail.com> There is a world on info including schematics for this application on The AM REFLECTOR.... Thought this might be some help....Good Luck 73,Bob --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com From paul at paulbaldock.com Sat Mar 21 18:15:47 2015 From: paul at paulbaldock.com (Paul Baldock) Date: Sat, 21 Mar 2015 15:15:47 -0700 Subject: [AMRadio] 813 Triode Connected Bias question. In-Reply-To: <550D7A2B.7060608@securespeed.us> References: <20150320221600.0DBC5149B49B@mailman.qth.net> <20150321023748.7FEB5149AE26@mailman.qth.net> <550D7A2B.7060608@securespeed.us> Message-ID: On a sample of 3 tubes, 4 diodes in series (1N4007 about 2.8 volts) in the cathode gives my 24-28mA, which is down from about 40mA with no doides. - Paul At 07:03 AM 3/21/2015, Larry Szendrei wrote: >However, there is no data for use in the triode class B connection, >and that is what Paul is looking for. > >In the absence of that data I think his suggested approach of >putting a pot in the cathode lead (center tap of fil. xfmr) to find >the correct operating point and then replace with a Zener (or >forward-biased diode string) of the correct value is a good one, and >the one I would probably use. > >73, >-Larry/NE1S >______________________________________________________________ >Our Main Website: http://www.amfone.net >AMRadio mailing list >Archives: http://mailman.qth.net/pipermail/amradio/ >List Rules (must read!): http://w5ami.net/amradiofaq.html >List Home: http://mailman.qth.net/mailman/listinfo/amradio >Post: AMRadio at mailman.qth.net >To unsubscribe, send an email to amradio-request at mailman.qth.net with >the word unsubscribe in the message body. > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com From jc at pctechref.com Wed Mar 25 16:02:52 2015 From: jc at pctechref.com (John Coleman) Date: Wed, 25 Mar 2015 15:02:52 -0500 Subject: [AMRadio] 813 Final Problem In-Reply-To: <20150319174549.AA3DF149AF90@mailman.qth.net> References: <5509A0B3.2060504@comcast.net> <20150319174549.AA3DF149AF90@mailman.qth.net> Message-ID: <000101d06736$b03d32c0$10b79840$@com> When I ran 813s in a class C final the grid current was about 16 ma per tube (seems like it was about 150 total bias, leak resistor plus fixed). With 2200 volts I got about 750 watts out with 1KW input. John, WA5BXO -----Original Message----- From: AMRadio [mailto:amradio-bounces at mailman.qth.net] On Behalf Of Paul Baldock Sent: Thursday, March 19, 2015 12:45 PM To: amradio at mailman.qth.net Subject: [AMRadio] 813 Final Problem I am building a 15 meter 2 x 813 class C final. HV is 2200V. With 16mA grid drive I can comfortably get 400W (and more) out. Every thing works fine until I insert the Mod transformer secondary in the HV lead to the PA. NOTHING is connected to the input (audio) side of the transformer. When I apply rf drive to the PA my High Voltage connectors arc over. It seems this must be caused by some sort of inductive spike. Any suggestions? - Paul KW7Y --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Archives: http://mailman.qth.net/pipermail/amradio/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio at mailman.qth.net To unsubscribe, send an email to amradio-request at mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From w5jo at brightok.net Thu Mar 26 21:41:04 2015 From: w5jo at brightok.net (Jim Wilhite) Date: Thu, 26 Mar 2015 20:41:04 -0500 Subject: [AMRadio] KOMA radio Message-ID: <8A36AA3E59C34F048A1F80676D428145@JimPC> Last evening a F1 or so tornado took down the three tower array of KOMA radio in Oklahoma City. The station is now KOKC and broadcasts talk. I worked at KOMA from early 1967 till late 1968 and am very sad to see this destruction. KOMA was on 1520 and shared the frequency with WKBW in Buffalo, NY. KOMA served the Western US and WKBW served the Eastern part of the country. Many people remember this station from the mid-fifties until it changed to country much later. This is a video story of the towers with some history and pictures of the destruction. Until last night we had not had a reported tornado in Oklahoma, a very rare occurrence. Then to have a minor one do this is amazing to me. http://www.themooredaily.com/news/the-story-behind-moores-destroyed-radio-towers Click on the picture for the video. Jim W5JO From k6xyz at sbcglobal.net Thu Mar 26 23:28:07 2015 From: k6xyz at sbcglobal.net (David Harmon) Date: Thu, 26 Mar 2015 22:28:07 -0500 Subject: [AMRadio] KOMA radio In-Reply-To: <8A36AA3E59C34F048A1F80676D428145@JimPC> References: <8A36AA3E59C34F048A1F80676D428145@JimPC> Message-ID: <000f01d0683e$0d1e3950$275aabf0$@sbcglobal.net> Hi Jim...... I'm sure sorry to hear that! In 60' I was a Sr. in high school in Tulsa and suddenly my family had to move to the Los Angeles area. I had to meet new friends and get a new girlfriend...quick! In the summer of 60' my new girlfriend and I used to park at the east end of the Los Angeles airport and watch the planes land. I always tuned in KOMA on the car radio as a way to keep that Okie connection going. Three or four years ago I was on the way to the OK City hamfest and saw those towers for the first time and I was surprised to see that they were a lot shorter than I had imagined. Long ago....far away. 73 David Harmon K6XYZ Sperry, OK -----Original Message----- From: AMRadio [mailto:amradio-bounces at mailman.qth.net] On Behalf Of Jim Wilhite Sent: Thursday, March 26, 2015 8:41 PM To: AM Radio List Subject: [AMRadio] KOMA radio Last evening a F1 or so tornado took down the three tower array of KOMA radio in Oklahoma City. The station is now KOKC and broadcasts talk. I worked at KOMA from early 1967 till late 1968 and am very sad to see this destruction. KOMA was on 1520 and shared the frequency with WKBW in Buffalo, NY. KOMA served the Western US and WKBW served the Eastern part of the country. Many people remember this station from the mid-fifties until it changed to country much later. This is a video story of the towers with some history and pictures of the destruction. Until last night we had not had a reported tornado in Oklahoma, a very rare occurrence. Then to have a minor one do this is amazing to me. http://www.themooredaily.com/news/the-story-behind-moores-destroyed-radio-to wers Click on the picture for the video. Jim W5JO ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Archives: http://mailman.qth.net/pipermail/amradio/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio at mailman.qth.net To unsubscribe, send an email to amradio-request at mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From w1aer at earthlink.net Thu Mar 26 23:56:57 2015 From: w1aer at earthlink.net (Art Roberts - W1AER) Date: Thu, 26 Mar 2015 23:56:57 -0400 Subject: [AMRadio] KOMA radio In-Reply-To: <8A36AA3E59C34F048A1F80676D428145@JimPC> References: <8A36AA3E59C34F048A1F80676D428145@JimPC> Message-ID: <1e3001d06842$12cefe30$386cfa90$@earthlink.net> Sure sad to see the towers go down. I have been in the station and around it for years. I saw the video that Channel 9 shot from their chopper yesterday, and it was right in the area of the station. Art Roberts W1AER Ex W5AER -----Original Message----- From: AMRadio [mailto:amradio-bounces at mailman.qth.net] On Behalf Of Jim Wilhite Sent: Thursday, March 26, 2015 9:41 PM To: AM Radio List Subject: [AMRadio] KOMA radio Last evening a F1 or so tornado took down the three tower array of KOMA radio in Oklahoma City. The station is now KOKC and broadcasts talk. I worked at KOMA from early 1967 till late 1968 and am very sad to see this destruction. KOMA was on 1520 and shared the frequency with WKBW in Buffalo, NY. KOMA served the Western US and WKBW served the Eastern part of the country. Many people remember this station from the mid-fifties until it changed to country much later. This is a video story of the towers with some history and pictures of the destruction. Until last night we had not had a reported tornado in Oklahoma, a very rare occurrence. Then to have a minor one do this is amazing to me. http://www.themooredaily.com/news/the-story-behind-moores-destroyed-radio-to wers Click on the picture for the video. Jim W5JO ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Archives: http://mailman.qth.net/pipermail/amradio/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio at mailman.qth.net To unsubscribe, send an email to amradio-request at mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From ranickel at comcast.net Fri Mar 27 00:32:55 2015 From: ranickel at comcast.net (Robert Nickels) Date: Thu, 26 Mar 2015 23:32:55 -0500 Subject: [AMRadio] KOMA radio In-Reply-To: <1e3001d06842$12cefe30$386cfa90$@earthlink.net> References: <8A36AA3E59C34F048A1F80676D428145@JimPC> <1e3001d06842$12cefe30$386cfa90$@earthlink.net> Message-ID: <5514DD77.3070708@comcast.net> Former KOMA program director Deane Johnson has shared some great pics of the studio and transmitter equipment here: http://www.pbase.com/deanej/koma_oklahoma_city KOMA had the biggest coverage area of all the Storz stations but listners wouldn't have guessed that the newest music on the planet came from a transmitter made in the 30s. We kept also kept pushbuttons set for The Big 89 and KAAY in Little Rock, but when you'd pull up to a stop light on a summer's night, it would be the KOMA Good Guys you'd hear coming from the other car radios. I wouldn't trade those memories for a stack of MP3 players, selective fading and all! A great history of the Todd Storz, the father of Top 40 radio: https://www.youtube.com/watch?v=G0HlmPDXcmE 73, Bob W9RAN From amradio at mailman.qth.net Fri Mar 27 02:04:19 2015 From: amradio at mailman.qth.net (CL in NC via AMRadio) Date: Thu, 26 Mar 2015 23:04:19 -0700 Subject: [AMRadio] Another 813 TX question Message-ID: <1427436259.13598.YahooMailBasic@web160602.mail.bf1.yahoo.com> A while back, a friend gave me a homebrew transmitter with and 813 final to check out. It had a bad plate xfmr, gave it back to him to let him see if he could find a replacement for it. It was intended for CW only for 80-20, but had a novel AM section added at a later date apparently. The 'modulator' was nothing more than a transformer put in series with the 813 grid bias, and the primary was fed with a carbon mic, with low voltage fed through it, the primary and ground. I never did get the TX back, but I did plug a carbon mic in and looked at the grid with a scope and there was quit a bit of audio there. There was no gain control other than talking loud or louder I guess. Anybody ever run across this circuit or used it and how did it sound and what kind of percent mod did it give? Charlie, W4MEC in NC From ranchorobbo at gmail.com Fri Mar 27 06:17:25 2015 From: ranchorobbo at gmail.com (Rob Atkinson) Date: Fri, 27 Mar 2015 05:17:25 -0500 Subject: [AMRadio] KOMA radio In-Reply-To: <5514DD77.3070708@comcast.net> References: <8A36AA3E59C34F048A1F80676D428145@JimPC> <1e3001d06842$12cefe30$386cfa90$@earthlink.net> <5514DD77.3070708@comcast.net> Message-ID: This reminds me of when the WWVA towers came down 5 years ago in a storm. A lot of DJs came out of KOMA Charlie Tuna, and Johnny Dark were two. The towers are 180 degrees but that high in the band they won't be super tall, probably around 300 feet. 73 Rob K5UJ From w5jo at brightok.net Fri Mar 27 11:00:28 2015 From: w5jo at brightok.net (Jim Wilhite) Date: Fri, 27 Mar 2015 10:00:28 -0500 Subject: [AMRadio] Equipment storage Message-ID: I have a bit too much equipment to keep it all in my shack and do not have a controlled climate building to store it in, rather I have a utility building that doubles as my garage. I have a couple of receivers in the building and detest they are subject to the weather changes in that building so I decided to find a better way. I settled on the ?Space Bag? made by Ziplock. They make a ?Jumbo? size and it fit my NC 183D with space to spare. After applying the vacuum cleaner to the valve it sucked the air out of the bag. That will give the equipment some protection against the elements of moisture and dust. Since the equipment was designed by people who expected heat and cold the receiver should remain in good condition until I decide to take it out, at least it will be as clean as it was when I put it in. Removing the moisture should reduce, if not eliminate, corrosion that can occur when metal is exposed to moisture in the air and temperature changes. I am sure the valve will leak some, but I can always evacuate it again. You can buy a cheaper version sold by Wal-Mart, but it doesn?t have the spacer under the valve to keep it from sealing off against flat surfaces. In that case put something under the valve such as a piece of filter from an air handler filter to keep the valve supported off the top of the case so the valve does not lay on a flat surface and seal off before removing as much air as possible. The bag I bought is large enough to easily handle a DX 100 or Globe Champion 300. For me, perfect for long term storage. I used my shop vac to suck the air out and it worked, however, the valve is designed for the same size tubing that is on your house vacuum cleaner. either will work but I imagine the home vacuum will be easier to use and may be better. Don?t know if anyone else has a similar problem or if this will work for you but thought I would share. Jim W5JO From amradio at mailman.qth.net Fri Mar 27 11:26:23 2015 From: amradio at mailman.qth.net (Mel Farrer via AMRadio) Date: Fri, 27 Mar 2015 15:26:23 +0000 (UTC) Subject: [AMRadio] Equipment storage In-Reply-To: References: Message-ID: <102003921.1369799.1427469983549.JavaMail.yahoo@mail.yahoo.com> Hello Jim, I too have the same problem, but instead of the vacuum bag, I use a sealed bag with a couple of desiccant pouches to draw the moisture.? Easy to see the color change if the bag leaks. Mel, K6KBE From: Jim Wilhite To: AM Radio List Sent: Friday, March 27, 2015 8:00 AM Subject: [AMRadio] Equipment storage I have a bit too much equipment to keep it all in my shack and do not have a controlled climate building to store it in, rather I have a utility building that doubles as my garage.? I have a couple of receivers in the building and detest they are subject to the weather changes in that building so I decided to find a better way. I settled on the ?Space Bag? made by Ziplock.? They make a ?Jumbo? size and it fit my NC 183D with space to spare.? After applying the vacuum cleaner to the valve it sucked the air out of the bag.? That will give the equipment some protection against the elements of moisture and dust.? Since the equipment was designed by people who expected heat and cold the receiver should remain in good condition until I decide to take it out, at least it will be as clean as it was when I put it in.? Removing the moisture should reduce, if not eliminate, corrosion that can occur when metal is exposed to moisture in the air and temperature changes. I am sure the valve will leak some, but I can always evacuate it again.? You can buy a cheaper version sold by Wal-Mart, but it doesn?t have the spacer under the valve to keep it from sealing off against flat surfaces.? In that case put something under the valve such as a piece of filter from an air handler filter to keep the valve supported off the top of the case so the valve does not lay on a flat surface and seal off before removing as much air as possible.? The bag I bought is large enough to easily handle a DX 100 or Globe Champion 300.? For me, perfect for long term storage.? I used my shop vac to suck the air out and it worked, however, the valve is designed for the same size tubing that is on your house vacuum cleaner.? either will work but I imagine the home vacuum will be easier to use and may be better. Don?t know if anyone else has a similar problem or if this will work for you but thought I would share. Jim W5JO ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Archives: http://mailman.qth.net/pipermail/amradio/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio at mailman.qth.net To unsubscribe, send an email to amradio-request at mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From Tonne at Comcast.net Fri Mar 27 11:49:14 2015 From: Tonne at Comcast.net (Jim Tonne) Date: Fri, 27 Mar 2015 11:49:14 -0400 Subject: [AMRadio] KOMA radio In-Reply-To: <5514DD77.3070708@comcast.net> References: <8A36AA3E59C34F048A1F80676D428145@JimPC> <1e3001d06842$12cefe30$386cfa90$@earthlink.net> <5514DD77.3070708@comcast.net> Message-ID: <55157BFA.2080105@Comcast.net> >> KOMA had the biggest coverage area of all the Storz stations >> but listners wouldn't have guessed that the newest music on >> the planet came from a transmitter made in the 30s. And I suspect most listeners didn't realize that a Shafer automation system was providing the programming in the 60s. KOMA had it down pat - I think it may have sounded even better than "live." But I see in the blogs that some manager-types didn't think so. - JimT From amradio at mailman.qth.net Fri Mar 27 11:55:02 2015 From: amradio at mailman.qth.net (Bill Guyger via AMRadio) Date: Fri, 27 Mar 2015 15:55:02 +0000 (UTC) Subject: [AMRadio] KOMA radio In-Reply-To: <8A36AA3E59C34F048A1F80676D428145@JimPC> References: <8A36AA3E59C34F048A1F80676D428145@JimPC> Message-ID: <1146824813.2996712.1427471702258.JavaMail.yahoo@mail.yahoo.com> Hi All Been there and done this. A Microburst took out 3 out of 4 towers at?KTCK one?of my AM's here in Dallas in 2008. The three towers that went down were in line (and still are) and?so closely spaced that the guy wires are interlaced. One tower went down due to the Microburst and took out the other two. The 4th tower is off to the side forming an equilateral triangle with the North and center towers and was unaffected other than having some of the?outer Philistrand guys from the North tower and the?center tower pulling down on?its outer guys. I was able to cut those with a big pair of cable cutters?and tower 4 kept us on the air for the duration with a little creative third world engineering. You have no idea of the sick feeling when you?get to the site at 3:30 AM after dodging debris in roadways?and only see one tower standing. The kick in the teeth?on?KOMA?/ KOKC?is that Jack Sellmeyer AD5VO had been working for months on modifications to the array and generating?new engineering and?licensing documents for the station that?were going to be filed with the FCC?next week. Jack is one of the preeminent experts on directional arrays and he had been sweating blood and / or?pulling?the afore mentioned teeth?to make this array work and all for naught now. Bill AD5OL ? From: Jim Wilhite To: AM Radio List Sent: Thursday, March 26, 2015 8:41 PM Subject: [AMRadio] KOMA radio Last evening a F1 or so tornado took down the three tower array of KOMA radio in Oklahoma City.? The station is now KOKC and broadcasts talk.? I worked at KOMA from early 1967 till late 1968 and am very sad to see this destruction.? KOMA was on 1520 and shared the frequency with WKBW in Buffalo, NY.? KOMA served the Western US and WKBW served the Eastern part of the country.? Many people remember this station from the mid-fifties until it changed to country much later. This is a video story of the towers with some history and pictures of the destruction.? Until last night we had not had a reported tornado in Oklahoma, a very rare occurrence.? Then to have a minor one do this is amazing to me. http://www.themooredaily.com/news/the-story-behind-moores-destroyed-radio-towers Click on the picture for the video. Jim W5JO ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Archives: http://mailman.qth.net/pipermail/amradio/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio at mailman.qth.net To unsubscribe, send an email to amradio-request at mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From w5jo at brightok.net Fri Mar 27 12:01:12 2015 From: w5jo at brightok.net (Jim Wilhite) Date: Fri, 27 Mar 2015 11:01:12 -0500 Subject: [AMRadio] KOMA radio In-Reply-To: <55157BFA.2080105@Comcast.net> References: <8A36AA3E59C34F048A1F80676D428145@JimPC> <1e3001d06842$12cefe30$386cfa90$@earthlink.net><5514DD77.3070708@comcast.net> <55157BFA.2080105@Comcast.net> Message-ID: <0C6EE1DCE7814F53A37C53BD25AA64E0@JimPC> For those of you that are curious about the Shafer system, Deane Johnson has posted pictures of the system along with some of the control board and equipment on his site. http://www.pbase.com/deanej/koma_oklahoma_city The system worked very well, but the program directors and managers felt is lost the human touch as you suggest Jim. It had been removed by the time I arrived in March 1967 but the Western Electric transmitter was still there. Jim W5JO -----Original Message----- And I suspect most listeners didn't realize that a Shafer automation system was providing the programming in the 60s. KOMA had it down pat - I think it may have sounded even better than "live." But I see in the blogs that some manager-types didn't think so. - JimT From w5jo at brightok.net Fri Mar 27 12:04:33 2015 From: w5jo at brightok.net (Jim Wilhite) Date: Fri, 27 Mar 2015 11:04:33 -0500 Subject: [AMRadio] KOMA radio In-Reply-To: <1146824813.2996712.1427471702258.JavaMail.yahoo@mail.yahoo.com> References: <8A36AA3E59C34F048A1F80676D428145@JimPC> <1146824813.2996712.1427471702258.JavaMail.yahoo@mail.yahoo.com> Message-ID: <856C4D61CA894505907FAB07D2F4EDC2@JimPC> Bill, I hope Tyler Broadcasting will put the system back, but if they were modifying to change coverage maybe they will construct new elements? I wish Jack was around to tell more of the story about the current situation. Jim W5JO From: Bill Guyger Hi All Been there and done this. A Microburst took out 3 out of 4 towers at KTCK one of my AM's here in Dallas in 2008. The three towers that went down were in line (and still are) and so closely spaced that the guy wires are interlaced. One tower went down due to the Microburst and took out the other two. The 4th tower is off to the side forming an equilateral triangle with the North and center towers and was unaffected other than having some of the outer Philistrand guys from the North tower and the center tower pulling down on its outer guys. I was able to cut those with a big pair of cable cutters and tower 4 kept us on the air for the duration with a little creative third world engineering. You have no idea of the sick feeling when you get to the site at 3:30 AM after dodging debris in roadways and only see one tower standing. The kick in the teeth on KOMA / KOKC is that Jack Sellmeyer AD5VO had been working for months on modifications to the array and generating new engineering and licensing documents for the station that were going to be filed with the FCC next week. Jack is one of the preeminent experts on directional arrays and he had been sweating blood and / or pulling the afore mentioned teeth to make this array work and all for naught now. Bill AD5OL From amradio at mailman.qth.net Fri Mar 27 12:11:06 2015 From: amradio at mailman.qth.net (Bill Guyger via AMRadio) Date: Fri, 27 Mar 2015 16:11:06 +0000 (UTC) Subject: [AMRadio] KOMA radio In-Reply-To: <856C4D61CA894505907FAB07D2F4EDC2@JimPC> References: <856C4D61CA894505907FAB07D2F4EDC2@JimPC> Message-ID: <559838440.2954257.1427472666573.JavaMail.yahoo@mail.yahoo.com> I talked to Jack last night about 8:00 or so and he said they?got them back on the air around 4:30. He was in a meeting so I didn't press him for details. I plan on calling him back to see if he has time to talk. Bill ? From: Jim Wilhite To: AM Radio List Sent: Friday, March 27, 2015 11:04 AM Subject: Re: [AMRadio] KOMA radio Bill, I hope Tyler Broadcasting will put the system back, but if they were modifying to change coverage maybe they will construct new elements?? I wish Jack was around to tell more of the story about the current situation. Jim W5JO From: Bill Guyger Hi All Been there and done this. A Microburst took out 3 out of 4 towers at KTCK one of my AM's here in Dallas in 2008. The three towers that went down were in line (and still are) and so closely spaced that the guy wires are interlaced. One tower went down due to the Microburst and took out the other two. The 4th tower is off to the side forming an equilateral triangle with the North and center towers and was unaffected other than having some of the outer Philistrand guys from the North tower and the center tower pulling down on its outer guys. I was able to cut those with a big pair of cable cutters and tower 4 kept us on the air for the duration with a little creative third world engineering. You have no idea of the sick feeling when you get to the site at 3:30 AM after dodging debris in roadways and only see one tower standing. The kick in the teeth on KOMA / KOKC is that Jack Sellmeyer AD5VO had been working for months on modifications to the array and generating new engineering and licensing documents for the station that were going to be filed with the FCC next week. Jack is one of the preeminent experts on directional arrays and he had been sweating blood and / or pulling the afore mentioned teeth to make this array work and all for naught now. Bill AD5OL ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Archives: http://mailman.qth.net/pipermail/amradio/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio at mailman.qth.net To unsubscribe, send an email to amradio-request at mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From nq5t at tx.rr.com Fri Mar 27 12:14:49 2015 From: nq5t at tx.rr.com (GRANT YOUNGMAN) Date: Fri, 27 Mar 2015 11:14:49 -0500 Subject: [AMRadio] Equipment storage In-Reply-To: <102003921.1369799.1427469983549.JavaMail.yahoo@mail.yahoo.com> References: <102003921.1369799.1427469983549.JavaMail.yahoo@mail.yahoo.com> Message-ID: <4C32F9EB-BD68-4BA0-8F98-2C192FE10247@tx.rr.com> JIm .. Thanks for the tip. I?ll have to look at that. I?m facing having to put a GC300 and a large number of too-nice-to-ruin vintage receivers in temporary storage while we get ready to relocate cross country. The thought of just piling those things even temporarily in a POD or something is out of the question. Even sealed against moisture I?m concerned about the effects of heat in non-climate controlled storage. Don?t know what I?m going to do yet. Probably end up having to pay the price of having each piece separately packed or crated and then find a climate controlled storage facility somewhere. Wife says I should just sell it. I don?t consider that a viable option :) Grant NQ5T > On Mar 27, 2015, at 10:26 AM, Mel Farrer via AMRadio wrote: > > Hello Jim, > I too have the same problem, but instead of the vacuum bag, I use a sealed bag with a couple of desiccant pouches to draw the moisture. Easy to see the color change if the bag leaks. > > Mel, K6KBE > > From: Jim Wilhite > To: AM Radio List > Sent: Friday, March 27, 2015 8:00 AM > Subject: [AMRadio] Equipment storage > > I have a bit too much equipment to keep it all in my shack and do not have a controlled climate building to store it in, rather I have a utility building that doubles as my garage. I have a couple of receivers in the building and detest they are subject to the weather changes in that building so I decided to find a better way. > > I settled on the ?Space Bag? made by Ziplock. They make a ?Jumbo? size and it fit my NC 183D with space to spare. After applying the vacuum cleaner to the valve it sucked the air out of the bag. That will give the equipment some protection against the elements of moisture and dust. Since the equipment was designed by people who expected heat and cold the receiver should remain in good condition until I decide to take it out, at least it will be as clean as it was when I put it in. Removing the moisture should reduce, if not eliminate, corrosion that can occur when metal is exposed to moisture in the air and temperature changes. > > I am sure the valve will leak some, but I can always evacuate it again. You can buy a cheaper version sold by Wal-Mart, but it doesn?t have the spacer under the valve to keep it from sealing off against flat surfaces. In that case put something under the valve such as a piece of filter from an air handler filter to keep the valve supported off the top of the case so the valve does not lay on a flat surface and seal off before removing as much air as possible. The bag I bought is large enough to easily handle a DX 100 or Globe Champion 300. For me, perfect for long term storage. I used my shop vac to suck the air out and it worked, however, the valve is designed for the same size tubing that is on your house vacuum cleaner. either will work but I imagine the home vacuum will be easier to use and may be better. From manualman at juno.com Fri Mar 27 12:47:05 2015 From: manualman at juno.com (manualman at juno.com) Date: Fri, 27 Mar 2015 12:47:05 -0400 Subject: [AMRadio] Equipment storage Message-ID: I realized years ago when I put some of my good equipment in storage with vacuum bags and/or sealed boxes, that 99% of it I never had the desire or interest to use it again. Good stuff, but had no room or interest to bring it back into the operating area, so I sold it all over time. At least someone else had the chance to play with them. No regrets. Plus, it helped to clear out a lot of clutter and put some cash in my hand to buy other stuff. Pete, wa2cwa On Fri, 27 Mar 2015 11:14:49 -0500 GRANT YOUNGMAN writes: > JIm .. > > Thanks for the tip. I?ll have to look at that. I?m facing > having to put a GC300 and a large number of too-nice-to-ruin vintage > receivers in temporary storage while we get ready to relocate cross > country. The thought of just piling those things even temporarily > in a POD or something is out of the question. Even sealed against > moisture I?m concerned about the effects of heat in non-climate > controlled storage. > > Don?t know what I?m going to do yet. Probably end up having to > pay the price of having each piece separately packed or crated and > then find a climate controlled storage facility somewhere. Wife > says I should just sell it. I don?t consider that a viable option > :) > > Grant NQ5T > > From: Jim Wilhite > > To: AM Radio List > > Sent: Friday, March 27, 2015 8:00 AM > > Subject: [AMRadio] Equipment storage > > > > I have a bit too much equipment to keep it all in my shack and do > not have a controlled climate building to store it in, rather I have > a utility building that doubles as my garage. I have a couple of > receivers in the building and detest they are subject to the weather > changes in that building so I decided to find a better way. > > > > I settled on the ?Space Bag? made by Ziplock. They make a > ?Jumbo? size and it fit my NC 183D with space to spare. After > applying the vacuum cleaner to the valve it sucked the air out of > the bag. That will give the equipment some protection against the > elements of moisture and dust. Since the equipment was designed by > people who expected heat and cold the receiver should remain in good > condition until I decide to take it out, at least it will be as > clean as it was when I put it in. Removing the moisture should > reduce, if not eliminate, corrosion that can occur when metal is > exposed to moisture in the air and temperature changes. > > > > I am sure the valve will leak some, but I can always evacuate it > again. You can buy a cheaper version sold by Wal-Mart, but it > doesn?t have the spacer under the valve to keep it from sealing > off against flat surfaces. In that case put something under the > valve such as a piece of filter from an air handler filter to keep > the valve supported off the top of the case so the valve does not > lay on a flat surface and seal off before removing as much air as > possible. The bag I bought is large enough to easily handle a DX > 100 or Globe Champion 300. For me, perfect for long term storage. > I used my shop vac to suck the air out and it worked, however, the > valve is designed for the same size tubing that is on your house > vacuum cleaner. either will work but I imagine the home vacuum will > be easier to use and may be better. From ranchorobbo at gmail.com Fri Mar 27 13:03:32 2015 From: ranchorobbo at gmail.com (Rob Atkinson) Date: Fri, 27 Mar 2015 12:03:32 -0500 Subject: [AMRadio] Equipment storage In-Reply-To: References: Message-ID: Whatever you store, just make sure you don't put any crystal element mics in anything but dry controlled climate storage. Rob K5UJ From k4kyv at charter.net Fri Mar 27 15:32:12 2015 From: k4kyv at charter.net (Donald Chester) Date: Fri, 27 Mar 2015 14:32:12 -0500 Subject: [AMRadio] KOMA radio Message-ID: <002501d068c4$b96977c0$2c3c6740$@charter.net> Hate to hear about those old 4-sided towers. Probably Blaw-Knox; the clue is the single set of guys attached near the middle, rather than multiple sets of guys along the length of the tower. The term for that configuration is "cantilever tower". The guy wire insulators in the photo look similar to the ones on the towers at WSM, WLW and WFEA. The base insulators were likely in two cone-shaped sections stacked one on top of the other, one resting upside down fastened to the concrete pier and the other attached to the base of the tower. The first Blaw-Knox towers were diamond shaped like the ones at the above-mentioned stations, but they later changed the design to uniform cross section after it was discovered that the bulge in the middle screwed up some of the antenna calculations and the towers didn't always perform exactly as predicted. Most early radio towers of all configurations were four sided, but later designs are usually the familiar triangular cross-section. To reduce costs I suspect KOMA will replace the towers with new off-the-shelf modern designs, although WBT in Charlotte NC rebuilt their Blaw-Knox diamonds exactly like the originals after damage from hurricane Hugo. Here is more information and photos of Blaw-Knox towers. http://hawkins.pair.com/blaw-knox.html Don k4kyv --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com From Ron.K3PID at sbcglobal.net Sat Mar 28 16:50:13 2015 From: Ron.K3PID at sbcglobal.net (K3PID) Date: Sat, 28 Mar 2015 15:50:13 -0500 Subject: [AMRadio] Protocol to remove a stuck slug. In-Reply-To: <2056E18D3BF149C6A94AA4FF97D71143@LILESJLAPTOP> References: <2056E18D3BF149C6A94AA4FF97D71143@LILESJLAPTOP> Message-ID: Thanks Jim! I am working on a Hammarlund HQ-180 and discovered that T-10 in the 60 KHz chain was frozen solid. Couldn't budge the slug. In case you aren't familiar with T-10 the under chassis end is buried deep beneath a multi deck rotary switch and it would be a horrendous job to remove the transformer and even to just remove the can. It had to be repaired from the top! So taking a tip from you, I carefully drilled out the top of the can to just over 1/4" dia. then broke up and removed the frozen core. I used a small parts magnet to extract the pieces. The to be sure that the new slug didn't get stuck in some damaged threads, I ran a 1/4 - 28 tap into the core to clean up the threads. The new slug went in smooth and easy. Viola! just like new. Ron K3PID From w5jo at brightok.net Sat Mar 28 22:19:39 2015 From: w5jo at brightok.net (Jim Wilhite) Date: Sat, 28 Mar 2015 21:19:39 -0500 Subject: [AMRadio] KOMA radio In-Reply-To: <002501d068c4$b96977c0$2c3c6740$@charter.net> References: <002501d068c4$b96977c0$2c3c6740$@charter.net> Message-ID: <7A79993E7E7C426F8D145D2A2057153F@JimPC> You are right Don, they are Blaw-Knox. I forget the height but think they were about 300 ft. The last set of guys were about half way up. I tried to locate the coverage by the local newspaper but couldn't fine it. They had pictures of the base installation of one of them. I have yet to hear if they will replace them or not. The OKC competitor at the time, WKY had a Franklin which they repaired about a decade back, so maybe there is hope. Given the current call sign is KOKC and it is all talk, which serves a mostly niche market, I am not sure the revenues for the station will be enough to support replacement. The current owners bought the station a few years back and paid near 1.6 million for the license and location. One thing that KOMA had going was it drew a large sum of national revenue in those days and I am not sure what they do now. A fellow ham and friend was hired a few months back to work on coverage and the licensing of the station. I haven't talked to him so am not sure what they are up to. However I bet they very well may give up the 50 KW and coverage to opt for more of a local map. Sad deal all around. Jim W5JO -----Original Message----- Hate to hear about those old 4-sided towers. Probably Blaw-Knox; the clue is the single set of guys attached near the middle, rather than multiple sets of guys along the length of the tower. The term for that configuration is "cantilever tower". The guy wire insulators in the photo look similar to the ones on the towers at WSM, WLW and WFEA. The base insulators were likely in two cone-shaped sections stacked one on top of the other, one resting upside down fastened to the concrete pier and the other attached to the base of the tower. Don k4kyv From ranchorobbo at gmail.com Sat Mar 28 22:54:53 2015 From: ranchorobbo at gmail.com (Rob Atkinson) Date: Sat, 28 Mar 2015 21:54:53 -0500 Subject: [AMRadio] KOMA radio In-Reply-To: <7A79993E7E7C426F8D145D2A2057153F@JimPC> References: <002501d068c4$b96977c0$2c3c6740$@charter.net> <7A79993E7E7C426F8D145D2A2057153F@JimPC> Message-ID: http://www.fybush.com/sites/2004/site-040122.html The middle tower is what's left. They'll probably do what was done at WWVA and use it to hang in inverted L with a STA from the FCC. Or if they can get the broken part off safely, keeping the bottom half of the middle tower they can run that as a 90 degree tower with lower power on an STA. FCC often extends STAs as long as they are needed if the owner can prove financial stress or some other unavoidable delay, but licensees usually desire to get the old field intensity back as soon as possible. That's a desirable dial spot and power level these days. The QRN is lower at the high end of the band and everyone wants 50KW to overcome the noise floor. The stations in trouble are the 2.5 KW and less, or properties with no night time authorization. Sadly, the rebuild may not involve anything as impressive as the BK towers. Might wind up with Rohn 65. but radio receivers won't know the difference. 73 Rob K5UJ From ne1s at securespeed.us Sun Mar 29 09:37:13 2015 From: ne1s at securespeed.us (Larry Szendrei) Date: Sun, 29 Mar 2015 09:37:13 -0400 Subject: [AMRadio] Another 813 TX question In-Reply-To: <1427436259.13598.YahooMailBasic@web160602.mail.bf1.yahoo.com> References: <1427436259.13598.YahooMailBasic@web160602.mail.bf1.yahoo.com> Message-ID: <55180009.9040501@securespeed.us> On 3/27/15 2:04 AM, CL in NC via AMRadio wrote: > A while back, a friend gave me a homebrew transmitter with and 813 final to check out. It had a bad plate xfmr, gave it back to him to let him see if he could find a replacement for it. It was intended for CW only for 80-20, but had a novel AM section added at a later date apparently. The 'modulator' was nothing more than a transformer put in series with the 813 grid bias, and the primary was fed with a carbon mic, with low voltage fed through it, the primary and ground. I never did get the TX back, but I did plug a carbon mic in and looked at the grid with a scope and there was quit a bit of audio there. There was no gain control other than talking loud or louder I guess. Anybody ever run across this circuit or used it and how did it sound and what kind of percent mod did it give? > > Charlie, W4MEC in NC > I'm not very familiar with that particular circuit, Charlie, but it's an implementation of control-grid modulation, which is one of the "efficiency modulation" techniques similar to screen or suppressor grid modulation. The bias on the 813 control grid would need to be increased (made more negative) to the point where the 813 RF carrier power output is no more than 25% of the maximum CW output power, preferably less to allow headroom for positive peaks exceeding 100%. It can sound very good with good audio quality applied to the PA control grid, which of course you aren't going to get from a carbon microphone. I don't believe there are any limitations on modulation percentage other than the positive peak won't exceed the maximum CW output. 73, -Larry/NE1S From Ron.K3PID at sbcglobal.net Mon Mar 30 19:40:23 2015 From: Ron.K3PID at sbcglobal.net (K3PID) Date: Mon, 30 Mar 2015 18:40:23 -0500 Subject: [AMRadio] RE Protocol to remove a stuck slug. Message-ID: <182A15B27E5B4E9C95364934C817A19E@Zeus> Reference Jim Liles post... Thanks Jim! I am working on a Hammarlund HQ-180 and discovered that T-10 in the 60 KHz chain was frozen solid. Couldn't budge the slug. In case you aren't familiar with T-10 the under chassis end is buried deep beneath a multi deck rotary switch and it would be a horrendous job to remove the transformer and even to just remove the can. It had to be repaired from the top! So taking a tip from you, I carefully drilled out the top of the can to just over 1/4" dia. then broke up and removed the frozen core. I used a small parts magnet to extract the pieces. The to be sure that the new slug didn't get stuck in some damaged threads, I ran a 1/4 - 28 tap into the core to clean up the threads. The new slug went in smooth and easy. Viola! just like new. Ron K3PID From rsauvan at beyondbb.com Mon Mar 30 19:43:09 2015 From: rsauvan at beyondbb.com (Robert Sauvan) Date: Mon, 30 Mar 2015 17:43:09 -0600 Subject: [AMRadio] sources for alignment tools Message-ID: <5519DF8D.7010407@beyondbb.com> Hi all, I am in need of some new alignment tools. In particular, the hex head piece to tune coil slugs. I have been searching, but only find cheap looking plastic ones like I have presently. I would like to find something that is a bit harder and stronger than the ones I am finding. The ones I have, worked fine for a bit. But, when you run across a tough slug to turn, they sorta just slip and get rounded off due to the softer plastic. What is everyone using and where are you getting them? Thanks-Bob-W0YBS From w5jo at brightok.net Mon Mar 30 20:40:43 2015 From: w5jo at brightok.net (Jim Wilhite) Date: Mon, 30 Mar 2015 19:40:43 -0500 Subject: [AMRadio] sources for alignment tools In-Reply-To: <5519DF8D.7010407@beyondbb.com> References: <5519DF8D.7010407@beyondbb.com> Message-ID: Hi Bob, Philmore still has them. Philmore is part of Datek and you can go to Philmore-datak.com to locate a dealer. If you want to spend some time looking through their catalog then search for "Alignment Tools", just as you asked. I haven't looked in a while but the last time it was a bit of work to find them and get the number. I suggest you find a dealer near you and work with them, they have quicker search capabilities than going through the Philmore catalog on line. Philmore still has an assortment that will have what you need. That is the only place that I know about that has those kind of tools. They may be the same as you have, but if you don't find anyplace else, well you know that answer. 73 Jim W5JO -----Original Message----- Hi all, I am in need of some new alignment tools. In particular, the hex head piece to tune coil slugs. I have been searching, but only find cheap looking plastic ones like I have presently. I would like to find something that is a bit harder and stronger than the ones I am finding. The ones I have, worked fine for a bit. But, when you run across a tough slug to turn, they sorta just slip and get rounded off due to the softer plastic. What is everyone using and where are you getting them? Thanks-Bob-W0YBS From james.liles at comcast.net Mon Mar 30 21:36:07 2015 From: james.liles at comcast.net (james.liles at comcast.net) Date: Mon, 30 Mar 2015 20:36:07 -0500 Subject: [AMRadio] sources for alignment tools In-Reply-To: <5519DF8D.7010407@beyondbb.com> References: <5519DF8D.7010407@beyondbb.com> Message-ID: Hi Bob, I use a 2.5mm allan wrench to start them then the plastic. Helps to keep from splitting the slug. Kindest regards Jim K9AXN -----Original Message----- From: Robert Sauvan Sent: Monday, March 30, 2015 6:43 PM To: Hammarlund Mail List ; Hallicrafters ; AM Radio Subject: [AMRadio] sources for alignment tools Hi all, I am in need of some new alignment tools. In particular, the hex head piece to tune coil slugs. I have been searching, but only find cheap looking plastic ones like I have presently. I would like to find something that is a bit harder and stronger than the ones I am finding. The ones I have, worked fine for a bit. But, when you run across a tough slug to turn, they sorta just slip and get rounded off due to the softer plastic. What is everyone using and where are you getting them? Thanks-Bob-W0YBS ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Archives: http://mailman.qth.net/pipermail/amradio/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio at mailman.qth.net To unsubscribe, send an email to amradio-request at mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From manualman at juno.com Tue Mar 31 02:47:32 2015 From: manualman at juno.com (manualman at juno.com) Date: Tue, 31 Mar 2015 02:47:32 -0400 Subject: [AMRadio] sources for alignment tools Message-ID: It's much easier to split a soft powered slug that's very hard to turn or jammed in a core with an allen wrench. Get a good quality set of alignment tools that's designed for the job. Pete, wa2cwa On Mon, 30 Mar 2015 20:36:07 -0500 writes: > Hi Bob, > > I use a 2.5mm allan wrench to start them then the plastic. Helps to > keep > from splitting the slug. > > Kindest regards Jim K9AXN > > -----Original Message----- > From: Robert Sauvan > Sent: Monday, March 30, 2015 6:43 PM > To: Hammarlund Mail List ; Hallicrafters ; AM Radio > Subject: [AMRadio] sources for alignment tools > > Hi all, > I am in need of some new alignment tools. In particular, the hex > head > piece to tune coil slugs. I have been searching, but only find > cheap > looking plastic ones like I have presently. I would like to find > something that is a bit harder and stronger than the ones I am > finding. > The ones I have, worked fine for a bit. But, when you run across a > tough > slug to turn, they sorta just slip and get rounded off due to the > softer > plastic. What is everyone using and where are you getting them? > > Thanks-Bob-W0YBS From rbethman at comcast.net Tue Mar 31 08:18:19 2015 From: rbethman at comcast.net (rbethman) Date: Tue, 31 Mar 2015 08:18:19 -0400 Subject: [AMRadio] sources for alignment tools In-Reply-To: <5519DF8D.7010407@beyondbb.com> References: <5519DF8D.7010407@beyondbb.com> Message-ID: <551A908B.5030104@comcast.net> The GC Electronics kit # 5040 is the one to get. It isn't very expensive. It also does NOT have the "conductive" alignment tools. You have to watch carefully that the contents of the alignment kits do NOT have the conductive tools. There is "one" soldering aid in this kit that "very obviously" *IS* conductive. It is made of stainless steel ends with plastic in the middle. This is much better than the old Radio Shack cheap plastic alignment tools that were all different colors. Regards, Bob - N0DGN On 3/30/2015 7:43 PM, Robert Sauvan wrote: > Hi all, > I am in need of some new alignment tools. In particular, the hex head > piece to tune coil slugs. I have been searching, but only find cheap > looking plastic ones like I have presently. I would like to find > something that is a bit harder and stronger than the ones I am > finding. The ones I have, worked fine for a bit. But, when you run > across a tough slug to turn, they sorta just slip and get rounded off > due to the softer plastic. What is everyone using and where are you > getting them? > > Thanks-Bob-W0YBS From frsahu0003 at embarqmail.com Tue Mar 31 08:37:31 2015 From: frsahu0003 at embarqmail.com (FRANK HUGHES hughes) Date: Tue, 31 Mar 2015 08:37:31 -0400 (EDT) Subject: [AMRadio] alignment tools In-Reply-To: Message-ID: <1116291894.46137242.1427805451866.JavaMail.root@embarqmail.com> Hi, I have bought many from ebay, search for "radio alignment tools" 73 Frank KJ4OLL ----- Original Message ----- From: amradio-request at mailman.qth.net To: amradio at mailman.qth.net Sent: Tuesday, March 31, 2015 8:18:24 AM Subject: AMRadio Digest, Vol 134, Issue 9 Send AMRadio mailing list submissions to amradio at mailman.qth.net To subscribe or unsubscribe via the World Wide Web, visit http://mailman.qth.net/mailman/listinfo/amradio or, via email, send a message with subject or body 'help' to amradio-request at mailman.qth.net You can reach the person managing the list at amradio-owner at mailman.qth.net When replying, please edit your Subject line so it is more specific than "Re: Contents of AMRadio digest..." Today's Topics: 1. RE Protocol to remove a stuck slug. (K3PID) 2. sources for alignment tools (Robert Sauvan) 3. Re: sources for alignment tools (Jim Wilhite) 4. Re: sources for alignment tools (james.liles at comcast.net) 5. Re: sources for alignment tools (manualman at juno.com) 6. Re: sources for alignment tools (rbethman) ---------------------------------------------------------------------- Message: 1 Date: Mon, 30 Mar 2015 18:40:23 -0500 From: "K3PID" To: "AMRadio at mailman.qth.net" Subject: [AMRadio] RE Protocol to remove a stuck slug. Message-ID: <182A15B27E5B4E9C95364934C817A19E at Zeus> Content-Type: text/plain; format=flowed; charset="utf-8"; reply-type=response Reference Jim Liles post... Thanks Jim! I am working on a Hammarlund HQ-180 and discovered that T-10 in the 60 KHz chain was frozen solid. Couldn't budge the slug. In case you aren't familiar with T-10 the under chassis end is buried deep beneath a multi deck rotary switch and it would be a horrendous job to remove the transformer and even to just remove the can. It had to be repaired from the top! So taking a tip from you, I carefully drilled out the top of the can to just over 1/4" dia. then broke up and removed the frozen core. I used a small parts magnet to extract the pieces. The to be sure that the new slug didn't get stuck in some damaged threads, I ran a 1/4 - 28 tap into the core to clean up the threads. The new slug went in smooth and easy. Viola! just like new. Ron K3PID ------------------------------ Message: 2 Date: Mon, 30 Mar 2015 17:43:09 -0600 From: Robert Sauvan To: Hammarlund Mail List , Hallicrafters , AM Radio Subject: [AMRadio] sources for alignment tools Message-ID: <5519DF8D.7010407 at beyondbb.com> Content-Type: text/plain; charset=utf-8; format=flowed Hi all, I am in need of some new alignment tools. In particular, the hex head piece to tune coil slugs. I have been searching, but only find cheap looking plastic ones like I have presently. I would like to find something that is a bit harder and stronger than the ones I am finding. The ones I have, worked fine for a bit. But, when you run across a tough slug to turn, they sorta just slip and get rounded off due to the softer plastic. What is everyone using and where are you getting them? Thanks-Bob-W0YBS ------------------------------ Message: 3 Date: Mon, 30 Mar 2015 19:40:43 -0500 From: "Jim Wilhite" To: "AM Radio" Subject: Re: [AMRadio] sources for alignment tools Message-ID: Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Hi Bob, Philmore still has them. Philmore is part of Datek and you can go to Philmore-datak.com to locate a dealer. If you want to spend some time looking through their catalog then search for "Alignment Tools", just as you asked. I haven't looked in a while but the last time it was a bit of work to find them and get the number. I suggest you find a dealer near you and work with them, they have quicker search capabilities than going through the Philmore catalog on line. Philmore still has an assortment that will have what you need. That is the only place that I know about that has those kind of tools. They may be the same as you have, but if you don't find anyplace else, well you know that answer. 73 Jim W5JO -----Original Message----- Hi all, I am in need of some new alignment tools. In particular, the hex head piece to tune coil slugs. I have been searching, but only find cheap looking plastic ones like I have presently. I would like to find something that is a bit harder and stronger than the ones I am finding. The ones I have, worked fine for a bit. But, when you run across a tough slug to turn, they sorta just slip and get rounded off due to the softer plastic. What is everyone using and where are you getting them? Thanks-Bob-W0YBS ------------------------------ Message: 4 Date: Mon, 30 Mar 2015 20:36:07 -0500 From: To: "Robert Sauvan" , "Hammarlund Mail List" , "Hallicrafters" , "AM Radio" Subject: Re: [AMRadio] sources for alignment tools Message-ID: Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Hi Bob, I use a 2.5mm allan wrench to start them then the plastic. Helps to keep from splitting the slug. Kindest regards Jim K9AXN -----Original Message----- From: Robert Sauvan Sent: Monday, March 30, 2015 6:43 PM To: Hammarlund Mail List ; Hallicrafters ; AM Radio Subject: [AMRadio] sources for alignment tools Hi all, I am in need of some new alignment tools. In particular, the hex head piece to tune coil slugs. I have been searching, but only find cheap looking plastic ones like I have presently. I would like to find something that is a bit harder and stronger than the ones I am finding. The ones I have, worked fine for a bit. But, when you run across a tough slug to turn, they sorta just slip and get rounded off due to the softer plastic. What is everyone using and where are you getting them? Thanks-Bob-W0YBS ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Archives: http://mailman.qth.net/pipermail/amradio/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio at mailman.qth.net To unsubscribe, send an email to amradio-request at mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ------------------------------ Message: 5 Date: Tue, 31 Mar 2015 02:47:32 -0400 From: To: hammarlund at mailman.qth.net Cc: amradio at mailman.qth.net, hallicrafters at mailman.qth.net Subject: Re: [AMRadio] sources for alignment tools Message-ID: Content-Type: text/plain; charset=us-ascii It's much easier to split a soft powered slug that's very hard to turn or jammed in a core with an allen wrench. Get a good quality set of alignment tools that's designed for the job. Pete, wa2cwa On Mon, 30 Mar 2015 20:36:07 -0500 writes: > Hi Bob, > > I use a 2.5mm allan wrench to start them then the plastic. Helps to > keep > from splitting the slug. > > Kindest regards Jim K9AXN > > -----Original Message----- > From: Robert Sauvan > Sent: Monday, March 30, 2015 6:43 PM > To: Hammarlund Mail List ; Hallicrafters ; AM Radio > Subject: [AMRadio] sources for alignment tools > > Hi all, > I am in need of some new alignment tools. In particular, the hex > head > piece to tune coil slugs. I have been searching, but only find > cheap > looking plastic ones like I have presently. I would like to find > something that is a bit harder and stronger than the ones I am > finding. > The ones I have, worked fine for a bit. But, when you run across a > tough > slug to turn, they sorta just slip and get rounded off due to the > softer > plastic. What is everyone using and where are you getting them? > > Thanks-Bob-W0YBS ------------------------------ Message: 6 Date: Tue, 31 Mar 2015 08:18:19 -0400 From: rbethman To: amradio at mailman.qth.net Subject: Re: [AMRadio] sources for alignment tools Message-ID: <551A908B.5030104 at comcast.net> Content-Type: text/plain; charset=utf-8; format=flowed The GC Electronics kit # 5040 is the one to get. It isn't very expensive. It also does NOT have the "conductive" alignment tools. You have to watch carefully that the contents of the alignment kits do NOT have the conductive tools. There is "one" soldering aid in this kit that "very obviously" *IS* conductive. It is made of stainless steel ends with plastic in the middle. This is much better than the old Radio Shack cheap plastic alignment tools that were all different colors. Regards, Bob - N0DGN On 3/30/2015 7:43 PM, Robert Sauvan wrote: > Hi all, > I am in need of some new alignment tools. In particular, the hex head > piece to tune coil slugs. I have been searching, but only find cheap > looking plastic ones like I have presently. I would like to find > something that is a bit harder and stronger than the ones I am > finding. The ones I have, worked fine for a bit. But, when you run > across a tough slug to turn, they sorta just slip and get rounded off > due to the softer plastic. What is everyone using and where are you > getting them? > > Thanks-Bob-W0YBS ------------------------------ Subject: Digest Footer ______________________________________________________________ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio at mailman.qth.net ------------------------------ End of AMRadio Digest, Vol 134, Issue 9 *************************************** From rbethman at comcast.net Tue Mar 31 09:37:19 2015 From: rbethman at comcast.net (rbethman) Date: Tue, 31 Mar 2015 09:37:19 -0400 Subject: [AMRadio] alignment tools In-Reply-To: <1116291894.46137242.1427805451866.JavaMail.root@embarqmail.com> References: <1116291894.46137242.1427805451866.JavaMail.root@embarqmail.com> Message-ID: <551AA30F.5000204@comcast.net> List, There are two GC Electronics Kit # 5040 on ebay now. Regards, Bob - N0DGN From rbethman at comcast.net Tue Mar 31 09:46:55 2015 From: rbethman at comcast.net (rbethman) Date: Tue, 31 Mar 2015 09:46:55 -0400 Subject: [AMRadio] sources for alignment tools In-Reply-To: References: Message-ID: <551AA54F.1020003@comcast.net> List, Go to: They have 13 in stock and are only $18.74. Lot Cheaper than E-Pay! Regards, Bob - N0DGN From DonC at martineer.net Tue Mar 31 10:00:38 2015 From: DonC at martineer.net (Don Cunningham) Date: Tue, 31 Mar 2015 09:00:38 -0500 Subject: [AMRadio] sources for alignment tools In-Reply-To: <551AA54F.1020003@comcast.net> References: <551AA54F.1020003@comcast.net> Message-ID: <551AA886.9050202@martineer.net> I would just ask, has anyone bought one of these "GC" kits recently?? MANY of these names of electronic tools are like the TV's, etc and are NO longer the quality they once were. BEWARE, I bought myself the "roll up" set of GC tools that I drooled over for all my working years for myself as a retirement gift to myself and it's FULL of cheap, plastic tools. Just a word to the wise. Don, WB5HAK On 3/31/2015 8:46 AM, rbethman wrote: > List, > > Go to: > > > They have 13 in stock and are only $18.74. > > Lot Cheaper than E-Pay! > > Regards, Bob - N0DGN > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Archives: http://mailman.qth.net/pipermail/amradio/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio at mailman.qth.net > To unsubscribe, send an email to amradio-request at mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > From rbethman at comcast.net Tue Mar 31 10:29:29 2015 From: rbethman at comcast.net (rbethman) Date: Tue, 31 Mar 2015 10:29:29 -0400 Subject: [AMRadio] sources for alignment tools In-Reply-To: <551AA886.9050202@martineer.net> References: <551AA54F.1020003@comcast.net> <551AA886.9050202@martineer.net> Message-ID: <551AAF49.10700@comcast.net> Don, Sure did! They are fiber filled Delrin. A couple others are fiberglass. Got it last year. Regards, Bob - N0DGN On 3/31/2015 10:00 AM, Don Cunningham wrote: > I would just ask, has anyone bought one of these "GC" kits recently?? > MANY of these names of electronic tools are like the TV's, etc and are > NO longer the quality they once were. BEWARE, I bought myself the > "roll up" set of GC tools that I drooled over for all my working years > for myself as a retirement gift to myself and it's FULL of cheap, > plastic tools. Just a word to the wise. > Don, WB5HAK > > > > On 3/31/2015 8:46 AM, rbethman wrote: >> List, >> >> Go to: >> >> >> They have 13 in stock and are only $18.74. >> >> Lot Cheaper than E-Pay! >> >> Regards, Bob - N0DGN From ranickel at comcast.net Tue Mar 31 10:36:38 2015 From: ranickel at comcast.net (Robert Nickels) Date: Tue, 31 Mar 2015 09:36:38 -0500 Subject: [AMRadio] sources for alignment tools In-Reply-To: References: Message-ID: <551AB0F6.4040404@comcast.net> Here's a suggestion: stop by your local bike shop and pick up a small container of teflon lube for about $5. I use Finish Line Dry Lube on my bike so it's always handy - it's a suspension of teflon particles in a quick-evaporating solvent designed to leave a teflon coating behind. I've had some success using a drop or two to loosen stuck/tight slugs, but mainly I apply it to lubricate the slug and form to make it easier to turn next time, or to minimize the chance of breakage on ones that are tight. 73, Bob W9RAN From hallicrafterssr2000 at k9axn.com Tue Mar 31 10:52:07 2015 From: hallicrafterssr2000 at k9axn.com (Jim Liles) Date: Tue, 31 Mar 2015 09:52:07 -0500 Subject: [AMRadio] [Hallicrafters] sources for alignment tools In-Reply-To: References: Message-ID: Pete, My email folders are all screwed up and your right about the right tool. I am certain that I read somewhere someone has a very rigid alignment tool. Everything that I have is junk plastic. Point me. Kindest regards Jim K9AXN -----Original Message----- From: manualman at juno.com Sent: Tuesday, March 31, 2015 1:47 AM To: hammarlund at mailman.qth.net Cc: amradio at mailman.qth.net ; hallicrafters at mailman.qth.net Subject: Re: [Hallicrafters] [AMRadio] sources for alignment tools It's much easier to split a soft powered slug that's very hard to turn or jammed in a core with an allen wrench. Get a good quality set of alignment tools that's designed for the job. Pete, wa2cwa On Mon, 30 Mar 2015 20:36:07 -0500 writes: > Hi Bob, > > I use a 2.5mm allan wrench to start them then the plastic. Helps to > keep > from splitting the slug. > > Kindest regards Jim K9AXN > > -----Original Message----- > From: Robert Sauvan > Sent: Monday, March 30, 2015 6:43 PM > To: Hammarlund Mail List ; Hallicrafters ; AM Radio > Subject: [AMRadio] sources for alignment tools > > Hi all, > I am in need of some new alignment tools. In particular, the hex > head > piece to tune coil slugs. I have been searching, but only find > cheap > looking plastic ones like I have presently. I would like to find > something that is a bit harder and stronger than the ones I am > finding. > The ones I have, worked fine for a bit. But, when you run across a > tough > slug to turn, they sorta just slip and get rounded off due to the > softer > plastic. What is everyone using and where are you getting them? > > Thanks-Bob-W0YBS ______________________________________________________________ Hallicrafters mailing list Home: http://mailman.qth.net/mailman/listinfo/hallicrafters Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Hallicrafters at mailman.qth.net List Administrator: Duane Fischer, W8DBF ** For Assistance: dfischer at usol.com ** This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From DonC at martineer.net Tue Mar 31 12:10:28 2015 From: DonC at martineer.net (Don Cunningham) Date: Tue, 31 Mar 2015 11:10:28 -0500 Subject: [AMRadio] sources for alignment tools In-Reply-To: <551AAF49.10700@comcast.net> References: <551AA54F.1020003@comcast.net> <551AA886.9050202@martineer.net> <551AAF49.10700@comcast.net> Message-ID: <551AC6F4.1070706@martineer.net> Bob, I figured you had, but wanted to check. I didn't, and that was in 2004, and have been sorry ever since when I try to use the set. It might be okay if I were into TV repair, as it has a multitude of the screwdriver slot tools, but the hex tools are a joke. Thanks for posting the number, as I have been picking up old used ones as I can and finding them MUCH better than the new ones. 73, Don, WB5HAK On 3/31/2015 9:29 AM, rbethman wrote: > Don, > > Sure did! > > They are fiber filled Delrin. > > A couple others are fiberglass. > > Got it last year. > > Regards, Bob - N0DGN > > > On 3/31/2015 10:00 AM, Don Cunningham wrote: >> I would just ask, has anyone bought one of these "GC" kits >> recently?? MANY of these names of electronic tools are like the >> TV's, etc and are NO longer the quality they once were. BEWARE, I >> bought myself the "roll up" set of GC tools that I drooled over for >> all my working years for myself as a retirement gift to myself and >> it's FULL of cheap, plastic tools. Just a word to the wise. >> Don, WB5HAK >> >> >> >> On 3/31/2015 8:46 AM, rbethman wrote: >>> List, >>> >>> Go to: >>> >>> >>> They have 13 in stock and are only $18.74. >>> >>> Lot Cheaper than E-Pay! >>> >>> Regards, Bob - N0DGN > > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Archives: http://mailman.qth.net/pipermail/amradio/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio at mailman.qth.net > To unsubscribe, send an email to amradio-request at mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > From rbethman at comcast.net Tue Mar 31 12:31:59 2015 From: rbethman at comcast.net (rbethman) Date: Tue, 31 Mar 2015 12:31:59 -0400 Subject: [AMRadio] sources for alignment tools In-Reply-To: <551AC6F4.1070706@martineer.net> References: <551AA54F.1020003@comcast.net> <551AA886.9050202@martineer.net> <551AAF49.10700@comcast.net> <551AC6F4.1070706@martineer.net> Message-ID: <551ACBFF.7030806@comcast.net> Been there and did that too! The old Radio Shack ones. Pure junk! I've also accumulated a bunch of others over the years from CEI receivers. They were the predecessor to Watkins Johnson. Every single one had the required alignment tools in clips inside the covers. I've developed a bit of a collection. Regards, Bob - N0DGN From rbethman at comcast.net Tue Mar 31 13:01:53 2015 From: rbethman at comcast.net (rbethman) Date: Tue, 31 Mar 2015 13:01:53 -0400 Subject: [AMRadio] Semi OT: The DARK Side Message-ID: <551AD301.1000405@comcast.net> I've started down the path of working with Surface Mount Devices. [Look, these newer radios are using them throughout! If I want to modify my TS-2000, I have now gained the equipment and skills to do so!] Obtained a USB 20X to 800X Microscope. I also obtained a Hot Air Rework Station. I've been looking at the Microwave Arena. Quite frankly, the "better" known folks do NOT use ROHS solder either! Dr. Gerald N. Johnson, K0CQ, highly recommends 60/40 solder due to better plasticity time to work with. He has a presentation, In this is the differences in the ROHS vs. Sn/Pb solders. I've been working with it for a few months now. I use 0.015" Multicore SN60/40 solder. It can be a bit tedious, but the hands are still steady enough. Transparency blanks for printers make good stencils for masking the components locations to prep the boards. Then you need a "good" metal framed magnifier lamp. Not the plastic junk ones from Harbor Freight. Although you can use one before you decide to get serious. So far so good! Regards, Bob N0DGN From amradio at mailman.qth.net Tue Mar 31 13:05:52 2015 From: amradio at mailman.qth.net (Bill Guyger via AMRadio) Date: Tue, 31 Mar 2015 17:05:52 +0000 (UTC) Subject: [AMRadio] sources for alignment tools In-Reply-To: <551AC6F4.1070706@martineer.net> References: <551AC6F4.1070706@martineer.net> Message-ID: <1076451897.2201902.1427821552013.JavaMail.yahoo@mail.yahoo.com> I totally agree with the statements about the quality of?alignment tools! I've got?quite a?collection from all the Marti RUP and STL gear?and Motorola 2 way stuff I've tweaked?they're all the finest Chinese Sweat Shop quality available. The hex tools round off on the corners and the slot types break on the ends, manufacturers are just not interested in making them out of?Delrin or some such, they can sell more that way. For the cans in Marti RPU transmitters that have a?slug with a?TINY slot, I've taken to?using a Bourns (or equivalent) trim pot tweaker and filing the flat?metal blade?end down to fit in the slug slots.?That reduces the effect of metal in the?magnetic field as much as possible and cuts the breaking of the tweaker down to zero.?The gotcha is that there is still metal in the magnetic field, but a couple of extra SWAG tweaks gets things onto frequency. Bill AD5OL ? From: Don Cunningham To: amradio at mailman.qth.net Sent: Tuesday, March 31, 2015 11:10 AM Subject: Re: [AMRadio] sources for alignment tools Bob, I figured you had, but wanted to check.? I didn't, and that was in 2004, and have been sorry ever since when I try to use the set.? It might be okay if I were into TV repair, as it has a multitude of the screwdriver slot tools, but the hex tools are a joke.? Thanks for posting the number, as I have been picking up old used ones as I can and finding them MUCH better than the new ones. 73, Don, WB5HAK On 3/31/2015 9:29 AM, rbethman wrote: > Don, > > Sure did! > > They are fiber filled Delrin. > > A couple others are fiberglass. > > Got it last year. > > Regards, Bob - N0DGN > > > On 3/31/2015 10:00 AM, Don Cunningham wrote: >> I would just ask, has anyone bought one of these "GC" kits >> recently??? MANY of these names of electronic tools are like the >> TV's, etc and are NO longer the quality they once were.? BEWARE, I >> bought myself the "roll up" set of GC tools that I drooled over for >> all my working years for myself as a retirement gift to myself and >> it's FULL of cheap, plastic tools.? Just a word to the wise. >> Don, WB5HAK >> >> >> >> On 3/31/2015 8:46 AM, rbethman wrote: >>> List, >>> >>> Go to: >>> >>> >>> They have 13 in stock and are only $18.74. >>> >>> Lot Cheaper than E-Pay! >>> >>> Regards, Bob - N0DGN > > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Archives: http://mailman.qth.net/pipermail/amradio/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio at mailman.qth.net > To unsubscribe, send an email to amradio-request at mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Archives: http://mailman.qth.net/pipermail/amradio/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio at mailman.qth.net To unsubscribe, send an email to amradio-request at mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From amradio at mailman.qth.net Tue Mar 31 13:19:10 2015 From: amradio at mailman.qth.net (K6OSM via AMRadio) Date: Tue, 31 Mar 2015 13:19:10 -0400 Subject: [AMRadio] sources for alignment tools Message-ID: <260cf.fbe8b94.424c310e@aol.com> I am late getting into this discussion, I have a large collection of alignment tools from the 70's up to the 90's that I used on Farinon and Collins microwave stations. My collection apparently is U.S. made and has held up well for about 35 years. I still have several Motorola new in plastic pocket protectors that came filled with the most popular alignment tools for 2-way mobiles and base stations. If I can help identify any particular tool by name or size I am happy to help. Bob K6OSM In a message dated 3/31/2015 10:06:36 A.M. Pacific Daylight Time, amradio at mailman.qth.net writes: I totally agree with the statements about the quality of alignment tools! I've got quite a collection from all the Marti RUP and STL gear and Motorola 2 way stuff I've tweaked they're all the finest Chinese Sweat Shop quality available. The hex tools round off on the corners and the slot types break on the ends, manufacturers are just not interested in making them out of Delrin or some such, they can sell more that way. For the cans in Marti RPU transmitters that have a slug with a TINY slot, I've taken to using a Bourns (or equivalent) trim pot tweaker and filing the flat metal blade end down to fit in the slug slots. That reduces the effect of metal in the magnetic field as much as possible and cuts the breaking of the tweaker down to zero. The gotcha is that there is still metal in the magnetic field, but a couple of extra SWAG tweaks gets things onto frequency. Bill AD5OL From: Don Cunningham To: amradio at mailman.qth.net Sent: Tuesday, March 31, 2015 11:10 AM Subject: Re: [AMRadio] sources for alignment tools Bob, I figured you had, but wanted to check. I didn't, and that was in 2004, and have been sorry ever since when I try to use the set. It might be okay if I were into TV repair, as it has a multitude of the screwdriver slot tools, but the hex tools are a joke. Thanks for posting the number, as I have been picking up old used ones as I can and finding them MUCH better than the new ones. 73, Don, WB5HAK On 3/31/2015 9:29 AM, rbethman wrote: > Don, > > Sure did! > > They are fiber filled Delrin. > > A couple others are fiberglass. > > Got it last year. > > Regards, Bob - N0DGN > > > On 3/31/2015 10:00 AM, Don Cunningham wrote: >> I would just ask, has anyone bought one of these "GC" kits >> recently?? MANY of these names of electronic tools are like the >> TV's, etc and are NO longer the quality they once were. BEWARE, I >> bought myself the "roll up" set of GC tools that I drooled over for >> all my working years for myself as a retirement gift to myself and >> it's FULL of cheap, plastic tools. Just a word to the wise. >> Don, WB5HAK >> >> >> >> On 3/31/2015 8:46 AM, rbethman wrote: >>> List, >>> >>> Go to: >>> >>> >>> They have 13 in stock and are only $18.74. >>> >>> Lot Cheaper than E-Pay! >>> >>> Regards, Bob - N0DGN > > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Archives: http://mailman.qth.net/pipermail/amradio/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio at mailman.qth.net > To unsubscribe, send an email to amradio-request at mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Archives: http://mailman.qth.net/pipermail/amradio/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio at mailman.qth.net To unsubscribe, send an email to amradio-request at mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Archives: http://mailman.qth.net/pipermail/amradio/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio at mailman.qth.net To unsubscribe, send an email to amradio-request at mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From rbethman at comcast.net Tue Mar 31 13:47:59 2015 From: rbethman at comcast.net (rbethman) Date: Tue, 31 Mar 2015 13:47:59 -0400 Subject: [AMRadio] OT: SMT An example of sizes Message-ID: <551ADDCF.3080506@comcast.net> This is one pic through the Microscope. Note the measurement of the *one* soldering "pad" is measured at 0.338 micrometers. The entire part first, is .142" X .142" Now the measurement of the *one* soldering "pad" is measured at 0.338 micrometers. Regards, Bob - N0DGN From m0ghq at outlook.com Tue Mar 31 14:44:55 2015 From: m0ghq at outlook.com (Max Cotton) Date: Tue, 31 Mar 2015 19:44:55 +0100 Subject: [AMRadio] Semi OT: The DARK Side In-Reply-To: <551AD301.1000405@comcast.net> References: <551AD301.1000405@comcast.net> Message-ID: If you want to do some proper SMD work you will need some decent needle tweezers, Titanium ones are best, liquid flux is a must in a pen brush dispenser, I use a Weller WD-2M solder station with needle tips and hot tweezers - ideal for removal and replacement of small components, a Leister Hot air gun with a 3mm nozzle, a decent magnifier with an integral lamp, I also would recommend some 3.5/4.5 (YMMV) reading glasses and lastly a set of the old 'helping hands' to hold the job whilst you solder the board. Also all the anti-stat precautions are a must, wristband, mat etc.I do proto SMD work for a living, it is fun and challenging, I personally use silver loaded tin/lead solder it just flows nicely, all these tools are not out of the reasonable price to buy especially on the e markets nowadays. I have the same setup at home and I mend / build all sorts of electronics. I am not phased by hand working any SMD device nowadays even 0201's but I still find BGA's a challenge to rework hihi. I still prefer tubes over 3 legged fuses anyday though!73, Max M0GHQ/W8BX > Date: Tue, 31 Mar 2015 13:01:53 -0400 > From: rbethman at comcast.net > To: amradio at mailman.qth.net > Subject: [AMRadio] Semi OT: The DARK Side > > I've started down the path of working with Surface Mount Devices. > > [Look, these newer radios are using them throughout! If I want to > modify my TS-2000, I have now gained the equipment and skills to do so!] > > Obtained a USB 20X to 800X Microscope. > > I also obtained a Hot Air Rework Station. > > I've been looking at the Microwave Arena. > > Quite frankly, the "better" known folks do NOT use ROHS solder either! > > Dr. Gerald N. Johnson, K0CQ, highly recommends 60/40 solder due to > better plasticity time to work with. He has a presentation, > > > In this is the differences in the ROHS vs. Sn/Pb solders. > > I've been working with it for a few months now. > > I use 0.015" Multicore SN60/40 solder. > > It can be a bit tedious, but the hands are still steady enough. > > Transparency blanks for printers make good stencils for masking the > components locations to prep the boards. > > Then you need a "good" metal framed magnifier lamp. Not the plastic > junk ones from Harbor Freight. Although you can use one before you > decide to get serious. > > So far so good! > > Regards, Bob N0DGN > From manualman at juno.com Tue Mar 31 15:14:15 2015 From: manualman at juno.com (manualman at juno.com) Date: Tue, 31 Mar 2015 15:14:15 -0400 Subject: [AMRadio] [Hallicrafters] sources for alignment tools Message-ID: I bought one of those GC alignment tool pouches with 20 to 30 (maybe even more) different short, long tools with a wide variety of different ends back in the mid 70's. I'm still using those same tools. On the rare occasion I need an alignment tool that requires a unique end and/or shaft diameter, I generally fabricate it out of round wood stock or some fiberglass. The only time I remember having slippage with a tool, it was due to the previous owner(s) reaming out the slots in the core with probably the wrong tool. Sometimes dropping a length or two of dental floss down into the core and then inserting the tool provides the grip action you need to turn the core. Pete, wa2cwa On Tue, 31 Mar 2015 09:52:07 -0500 "Jim Liles" writes: > Pete, > > My email folders are all screwed up and your right about the right > tool. I > am certain that I read somewhere someone has a very rigid alignment > tool. > Everything that I have is junk plastic. Point me. > > Kindest regards Jim K9AXN > > > > -----Original Message----- > From: manualman at juno.com > Sent: Tuesday, March 31, 2015 1:47 AM > To: hammarlund at mailman.qth.net > Cc: amradio at mailman.qth.net ; hallicrafters at mailman.qth.net > Subject: Re: [Hallicrafters] [AMRadio] sources for alignment tools > > It's much easier to split a soft powered slug that's very hard to > turn or > jammed in a core with an allen wrench. Get a good quality set of > alignment tools that's designed for the job. > > Pete, wa2cwa > > On Mon, 30 Mar 2015 20:36:07 -0500 > writes: > > Hi Bob, > > > > I use a 2.5mm allan wrench to start them then the plastic. Helps > to > > keep > > from splitting the slug. > > > > Kindest regards Jim K9AXN From rbethman at comcast.net Tue Mar 31 15:41:45 2015 From: rbethman at comcast.net (rbethman) Date: Tue, 31 Mar 2015 15:41:45 -0400 Subject: [AMRadio] [Hallicrafters] sources for alignment tools In-Reply-To: References: Message-ID: <551AF879.3080200@comcast.net> Yep! Had one in '86. That one even had the spring removal tool. I have "most" of that set still here. A few have gone over the years. It was awfully hard to keep a young son out of MY tools! He even took apart a measuring tape when he was about 5. It scared the crap out of him. I came back after a several weeks long mission and found it on the floor in the Radio Shack in Georgia. Regards, Bob - N0DGN On 3/31/2015 3:14 PM, manualman at juno.com wrote: > I bought one of those GC alignment tool pouches with 20 to 30 (maybe even > more) different short, long tools with a wide variety of different ends > back in the mid 70's. I'm still using those same tools. On the rare > occasion I need an alignment tool that requires a unique end and/or shaft > diameter, I generally fabricate it out of round wood stock or some > fiberglass. The only time I remember having slippage with a tool, it was > due to the previous owner(s) reaming out the slots in the core with > probably the wrong tool. Sometimes dropping a length or two of dental > floss down into the core and then inserting the tool provides the grip > action you need to turn the core. > > Pete, wa2cwa From cw_de_n5op at sbcglobal.net Tue Mar 31 15:46:41 2015 From: cw_de_n5op at sbcglobal.net (Kimberly Elmore) Date: Tue, 31 Mar 2015 19:46:41 +0000 (UTC) Subject: [AMRadio] Semi OT: The DARK Side In-Reply-To: <551AD301.1000405@comcast.net> References: <551AD301.1000405@comcast.net> Message-ID: <1142034894.1088502.1427831201969.JavaMail.yahoo@mail.yahoo.com> I have to hand it to you, Bob: I'm impressed. My Dad, W5JHJ (SK 2007), had a shop for many years and started getting into SMD but his vision was failing and his eye-hand-coordination was getting worse, so he couldn't get very far into it. Somehow, I missed getting any of his SMD equipment from his estate (a sibling who had unrestrained access to their house for a while and may have disposed of it) but I would have liked to see what he had. He was only just getting into it... If you don't mind my asking, where did you get your rework equipment and what sort of ballpark costs have you incurred? If some of it was used, what was your source? 73, Kim N5OP On Tuesday, March 31, 2015 12:02 PM, rbethman wrote: I've started down the path of working with Surface Mount Devices. [Look, these newer radios are using them throughout!? If I want to modify my TS-2000, I have now gained the equipment and skills to do so!] Obtained a USB 20X to 800X Microscope. I also obtained a Hot Air Rework Station. I've been looking at the Microwave Arena. Quite frankly, the "better" known folks do NOT use ROHS solder either! Dr. Gerald N. Johnson, K0CQ, highly recommends 60/40 solder due to better plasticity time to work with.? He has a presentation, In this is the differences in the ROHS vs. Sn/Pb solders. I've been working with it for a few months now. I use 0.015" Multicore SN60/40 solder. It can be a bit tedious, but the hands are still steady enough. Transparency blanks for printers make good stencils for masking the components locations to prep the boards. Then you need a "good" metal framed magnifier lamp.? Not the plastic junk ones from Harbor Freight.? Although you can use one before you decide to get serious. So far so good! Regards, Bob N0DGN ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Archives: http://mailman.qth.net/pipermail/amradio/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio at mailman.qth.net To unsubscribe, send an email to amradio-request at mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From rbethman at comcast.net Tue Mar 31 16:10:08 2015 From: rbethman at comcast.net (rbethman) Date: Tue, 31 Mar 2015 16:10:08 -0400 Subject: [AMRadio] Semi OT: The DARK Side In-Reply-To: <1142034894.1088502.1427831201969.JavaMail.yahoo@mail.yahoo.com> References: <551AD301.1000405@comcast.net> <1142034894.1088502.1427831201969.JavaMail.yahoo@mail.yahoo.com> Message-ID: <551AFF20.50504@comcast.net> Kim, Picked up the USB Microscope on the E-Pay site. There is a Stateside seller, His "company" is T-Motorsport. The "seller name" is gold3288gold . The Air Rework station came from Amazon. 2 in 1 878AD Rework Soldering station Welder Hot air Gun & Tip 640W with iron and heat. It was $58.95 plus tax. I ordered the Kester 951 Soldering Flux Pen Low-Solids also. As I said, I have a 0.5Lb spool of Multicore, {Brand Name}, SN60/Pb40 in 0.015". Don't ask! I have a friend that works in a Multiplexer/Switch and the like Laboratory. I won't look a gift horse in the mouth! Regards, Bob - N0DGN On 3/31/2015 3:46 PM, Kimberly Elmore wrote: > I have to hand it to you, Bob: I'm impressed. My Dad, W5JHJ (SK 2007), > had a shop for many years and started getting into SMD but his vision > was failing and his eye-hand-coordination was getting worse, so he > couldn't get very far into it. Somehow, I missed getting any of his > SMD equipment from his estate (a sibling who had unrestrained access > to their house for a while and may have disposed of it) but I would > have liked to see what he had. He was only just getting into it... > > If you don't mind my asking, where did you get your rework equipment > and what sort of ballpark costs have you incurred? If some of it was > used, what was your source? > > 73, > > Kim N5OP From k4kyv at charter.net Tue Mar 31 18:58:15 2015 From: k4kyv at charter.net (Donald Chester) Date: Tue, 31 Mar 2015 17:58:15 -0500 Subject: [AMRadio] Old Solder Message-ID: <000601d06c06$2bc7c3a0$83574ae0$@charter.net> I have several partial 5 lb rolls of various sizes of old rosin core solder I have had on hand, some for decades. The old stuff doesn't seem to work as well as a fresh roll I picked up recently at an estate sale. When I use the old solder, it seems to be getting harder and harder to get the wire and terminal to take the solder. This is something that has occurred gradually, and I hadn't really noticed it until I tried the fresh roll and experienced the difference. I had always assumed solder not taking would be caused by oxidation of the metal, since some of my terminal lugs and hookup wire, and equipment I work on, may be older than the solder, but I discovered that fresh solder takes much better. I vaguely recall someone telling me that the rosin flux in the core deteriorates with age, something I took with a grain of salt, but maybe they were correct. With new rolls of solder getting increasingly expensive and the possibility that ordinary 60/40 lead/tin solder may eventually be unobtanium, I wouldn't throw out my old rolls. Perhaps liquid flux like what is used with circuit boards would help, by dipping the end of the solder rod into the flux before applying it to the connection. Just wondering, has anyone ever experienced this problem before? I had always assumed that solder was solder, and that a roll would outlast me if I didn't use it all up first. Don k4kyv --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com From w5jo at brightok.net Tue Mar 31 19:31:58 2015 From: w5jo at brightok.net (Jim Wilhite) Date: Tue, 31 Mar 2015 18:31:58 -0500 Subject: [AMRadio] Old Solder In-Reply-To: <000601d06c06$2bc7c3a0$83574ae0$@charter.net> References: <000601d06c06$2bc7c3a0$83574ae0$@charter.net> Message-ID: <072B05398EE44A86811AF7C4AADA5BBE@JimPC> Yes I have seen the same thing. I have some liquid and paste flux so, if I am using the old stuff, I paint the joint where I am soldering before I apply the solder. I had a joint outside that has been exposed to weather the past 4+ years that needed to be soldered. By using the flux the joint took the solder on the first pass. Jim W5JO -----Original Message----- I vaguely recall someone telling me that the rosin flux in the core deteriorates with age, something I took with a grain of salt, but maybe they were correct. Don k4kyv --- From james.liles at comcast.net Tue Mar 31 20:52:44 2015 From: james.liles at comcast.net (james.liles at comcast.net) Date: Tue, 31 Mar 2015 19:52:44 -0500 Subject: [AMRadio] Old Solder In-Reply-To: <000601d06c06$2bc7c3a0$83574ae0$@charter.net> References: <000601d06c06$2bc7c3a0$83574ae0$@charter.net> Message-ID: <3E1250A04DB44F31A892254C8B362C60@LILESJLAPTOP> Have you noticed that old tined wire is generally difficult to solder and even if you sand the surface off, it remains difficult until you reach the copper? I find this especially in final compartments. Kindest regards Jim K9AXN -----Original Message----- From: Donald Chester Sent: Tuesday, March 31, 2015 5:58 PM To: amradio at mailman.qth.net Subject: [AMRadio] Old Solder I have several partial 5 lb rolls of various sizes of old rosin core solder I have had on hand, some for decades. The old stuff doesn't seem to work as well as a fresh roll I picked up recently at an estate sale. When I use the old solder, it seems to be getting harder and harder to get the wire and terminal to take the solder. This is something that has occurred gradually, and I hadn't really noticed it until I tried the fresh roll and experienced the difference. I had always assumed solder not taking would be caused by oxidation of the metal, since some of my terminal lugs and hookup wire, and equipment I work on, may be older than the solder, but I discovered that fresh solder takes much better. I vaguely recall someone telling me that the rosin flux in the core deteriorates with age, something I took with a grain of salt, but maybe they were correct. With new rolls of solder getting increasingly expensive and the possibility that ordinary 60/40 lead/tin solder may eventually be unobtanium, I wouldn't throw out my old rolls. Perhaps liquid flux like what is used with circuit boards would help, by dipping the end of the solder rod into the flux before applying it to the connection. Just wondering, has anyone ever experienced this problem before? I had always assumed that solder was solder, and that a roll would outlast me if I didn't use it all up first. Don k4kyv --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Archives: http://mailman.qth.net/pipermail/amradio/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio at mailman.qth.net To unsubscribe, send an email to amradio-request at mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From w5jo at brightok.net Tue Mar 31 21:24:22 2015 From: w5jo at brightok.net (Jim Wilhite) Date: Tue, 31 Mar 2015 20:24:22 -0500 Subject: [AMRadio] Old Solder In-Reply-To: <3E1250A04DB44F31A892254C8B362C60@LILESJLAPTOP> References: <000601d06c06$2bc7c3a0$83574ae0$@charter.net> <3E1250A04DB44F31A892254C8B362C60@LILESJLAPTOP> Message-ID: <3482E5A40D314C9FB5E05F49094DDDFB@JimPC> I immerse it in vinegar until the color changes, rinse and solder happily. Jim W5JO -----Original Message----- Have you noticed that old tined wire is generally difficult to solder and even if you sand the surface off, it remains difficult until you reach the copper? I find this especially in final compartments. Kindest regards Jim K9AXN From james.liles at comcast.net Tue Mar 31 21:36:46 2015 From: james.liles at comcast.net (james.liles at comcast.net) Date: Tue, 31 Mar 2015 20:36:46 -0500 Subject: [AMRadio] Old Solder In-Reply-To: <3482E5A40D314C9FB5E05F49094DDDFB@JimPC> References: <000601d06c06$2bc7c3a0$83574ae0$@charter.net><3E1250A04DB44F31A892254C8B362C60@LILESJLAPTOP> <3482E5A40D314C9FB5E05F49094DDDFB@JimPC> Message-ID: <7B345E6B23E14592867982552E029B58@LILESJLAPTOP> Thanks Jim --- will try. Regards Jim K9AXN -----Original Message----- From: Jim Wilhite Sent: Tuesday, March 31, 2015 8:24 PM To: amradio at mailman.qth.net Subject: Re: [AMRadio] Old Solder I immerse it in vinegar until the color changes, rinse and solder happily. Jim W5JO -----Original Message----- Have you noticed that old tined wire is generally difficult to solder and even if you sand the surface off, it remains difficult until you reach the copper? I find this especially in final compartments. Kindest regards Jim K9AXN ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Archives: http://mailman.qth.net/pipermail/amradio/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio at mailman.qth.net To unsubscribe, send an email to amradio-request at mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From amradio at mailman.qth.net Tue Mar 31 23:35:49 2015 From: amradio at mailman.qth.net (CL in NC via AMRadio) Date: Tue, 31 Mar 2015 20:35:49 -0700 Subject: [AMRadio] Any core solder Message-ID: <1427859349.68114.YahooMailBasic@web160605.mail.bf1.yahoo.com> Does anybody know how solder is made? Even the small stuff would have 5 holes within its diameter filled with flux. How do they put 5 holes in it, and fill it with flux? Took a chance on the "How It's Made" TV show and asked them to do a show on that, but didn't even get an email back. Charlie, W4MEC in NC

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