[AMRadio] dds information


Geoff/W5OMR w5omr at w5omr.shacknet.nu
Fri Jul 16 16:46:18 EDT 2004


Jim:

What am I, Chopped liver?

I've sent you a few different e-amils, but never a reply. 

What gives?

----- Original Message ----- 
From: "Jim candela" <jcandela at prodigy.net>
To: "Discussion of AM Radio" <amradio at mailman.qth.net>
Sent: Friday, July 16, 2004 3:16 PM
Subject: RE: [AMRadio] dds information


> 
> Neal,
> 
> I don't have a web site. Maybe your thinking about James Hagerty WA1FFL
> instead of me. Ask him at jim at buddytone.com
> 
> His option F covers 160:
> 
>  f.  1.8-2.3 MHz (160 meters +)
> 
> 
> Here are a few pictures of another OM's method of packaging the VFO. No
> expense was spared! I love to see a truly home-brewed project. The second
> link is the most informative. This is from K4VIB's QRP Website:
> 
> http://home.att.net/~w.harbourjr/ddsvfo_1.JPG
> 
> http://home.att.net/~w.harbourjr/ddsvfo_2.JPG
> 
> 
> Jim Candela
> WD5JKO
> 
> -----Original Message-----
> From: amradio-bounces at mailman.qth.net
> [mailto:amradio-bounces at mailman.qth.net]On Behalf Of Neal Newman
> Sent: Friday, July 16, 2004 2:31 PM
> To: Discussion of AM Radio
> Subject: Re: [AMRadio] dds information
> 
> 
>  Jim Do you have a website up?
> I run a few broadcast transmitters on 160 Meters AM.... looking for a
> crystal replacement to change Frequencys On 160 meters..  any plans on a
> VFO for these type Rigs?
> Neal Newman-KA2CAF
> Big Iron  collector
> http://www.angelfire.com/nj4/wttm/rca.html
> 
> Jim candela wrote:
> 
> >Bill,
> >
> > Below is the scoop on the WA1FFL version. His email address is listed
> there
> >at the top. Sure would be nice to have some clean sounding AM rigs on the
> >air that are also not drifting! This might be perfect for a Class E solid
> >state rig, as well as some boat-anchors.
> >
> >This unit will also power up at the minimum frequency like Don was saying
> >about his unit. A more sophisticated micro-controller, or computer
> interface
> >is needed for more "bells and whistles". For me, a plain-Jane DDS VFO is my
> >goal.
> >
> >Regards,
> >Jim
> >
> >
> >-----Original Message-----
> >From: James Hagerty [mailto:jim at buddytone.com]
> >Sent: Tuesday, May 25, 2004 7:57 PM
> >To: Candela, Jim
> >Subject: Re: Compact DDS VFO Information Request
> >
> >
> >I still have plenty of boards and parts. Nice to hear from a new reader.
> >My "kit" is a partial one with the hard-to-get components only.
> >A programmed microprocessor is included.
> >Note: R1, R8, and R9 are 1/4 watt, not 1/2 watt as stated in the parts
> list.
> >Parts Kit Information: To make the VFO as affordable and simple as possible
> >to build, I am offering a partial parts kit that includes the following:
> >     1. High-quality, commercial-grade p.c. board with the AD9835 DDS
> >surface-mount chip already soldered on (professionally done, not by me!)
> >     2. Output op amp (AD811AN)
> >     3. Microprocessor programmed for your band of choice, including
> socket.
> >This kit is available for a cost of $35.00 plus $5.00 shipping and handling
> >(overseas orders add $2.00, with payment with a bank check for
> U.S.Dollars).
> >The bands available as of today are:
> >     a. 3.5-4.0 MHz.
> >     b. 7.0-7.5 MHz.
> >     c. 5.5-5.0 MHz. (reverse tuning for local-oscillator operation);
> >5.0-5.5 MHz. also available
> >     d. 10.0-10.5 MHz.
> >     e. 14.0-14.5 MHz.
> >      f.  1.8-2.3 MHz (160 meters +)
> >The display reads 000.000-500.000 kHz  for all of these band choices.  I
> >also just finished a VFO with a 1 or a 10 MHz. tuning span (up to 14.5
> MHz).
> >I also have a 2 MHz span version.
> >
> >***I strongly advise using some filtering at the output of the VFO. If you
> >do not have a copy of the W7ZOI/K5IRK receiver
> >article (which contains some very nice lowpass/bandpass filter info) I can
> >supply a copy of the filter design data.I also have a CQ article by Doug
> >DeMaw regarding the use of solid-state VFOs with older vacuum-tube rigs,
> >which may be of
> >interest to you. ***In addition to the above, I am offering limited
> >quantities of the following: Industrial-grade, p.c.-mount BNC connectors
> for
> >$7.00 each (made by Trompeter) and I have one shaft encoder for $22.00.
> > All of the other parts are available from sources like Digi-Key, Mouser
> >Electronics, and All-Electronics. The latter has very nice surplus displays
> >for under $10.00. Anything by Optrex or Varitronix should work.
> >     My parts kit has only the premium parts which builders would have
> >trouble getting in small quantities.  Selling the kit this way saves the
> >builder a lot by giving him the flexibility for choosing displays and
> >enclosures, output connectors, using junk box parts, etc. and it prevents
> me
> >from having to stock several thousand dollars worth of parts.
> >
> >***Please make all checks out to: James Hagerty.
> >     My address is: 64 Nonquit Lane, Tiverton, R.I. 02878, U.S.A.
> >     I am also including a short assembly and applications ideas guide
> along
> >with the premium parts kit. It's about 3 pages. I have built 6 boards and I
> >had no trouble whatsoever getting any of them working.
> >      73, Jim   WA1FFL
> >
> >
> >-----Original Message-----
> >From: amradio-bounces at mailman.qth.net
> >[mailto:amradio-bounces at mailman.qth.net]On Behalf Of BILL WINTER
> >Sent: Friday, July 16, 2004 1:09 PM
> >To: amradio
> >Subject: [AMRadio] dds information
> >
> >
> >where can one obtain pre-programed cpu chips for either (or both)
> >the wa1ffl or the kg6cyn dds devices? I can handle everything else.
> >Bill
> >______________________________________________________________
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