[AMRadio] VFO for 20V-3


Neal Newman groucho at skyweb.net
Thu Jan 6 21:21:44 EST 2005


You May want to contact  Jack Gittings KA6JDZ He Builds a DipSwitch PLL 
Unit which replaces the Crystal.  He sells them On Ebay   I found it 
while searching for "am transmitter"


Bob Maser wrote:

> When I got my 20V-3 the coil sets had already been modified for 75M by 
> WA5MOE.  He followed the directions in the conversion manual 
> "published" by Bill Carns, N7OTQ.  I have the manual and it says to 
> remove the existing windings and replace with 22 turns of #24 silk 
> covered coil wire.  I don't think that silk covering is necessary.  
> Plain old Formvar coated solid copper wire is fine.  Do you have 
> Bill's manual?  I think he would send you one if you asked.
> Tnx for your input on the VFO.
>
> Bob
> ----- Original Message ----- From: "David Knepper" <cra at floodcity.net>
> To: "Bob Maser" <bmaser at tampabay.rr.com>
> Sent: Thursday, January 06, 2005 7:45 PM
> Subject: Re: [AMRadio] VFO for 20V-3
>
>
>> Bob, I, too, own a 20V-3 and would be interested in knowing how you 
>> changed
>> the two shielded coils to resonate on 75 meters.  Will these same coils
>> resonate on 160 meters.
>>
>> I finally, after much trial and error, got the buffer and driver 
>> coils to
>> work on 160 meters.  I had to remove wire from the coils.
>>
>> For a PTO,. I would recommend inserting it into the plate of the 
>> oscillator
>> tube through a capacitor.
>> You would pull out the oscillator tube, of course.  Perhaps, a Heathkit
>> VFO - being more common - would work.
>>
>> Thanks
>>
>> Dave, W3ST
>> Publisher of the Collins Journal
>> Secretary to the Collins Radio Association
>> www.collinsra.com
>> Nets:  3805 Khz, Monday/Wednesdays 8 PM EDST
>>          14250 Khz Saturday, 12 Noon EDST
>>
>> ----- Original Message -----
>> From: "Bob Maser" <>
>> To: "AMRadio" <amradio at mailman.qth.net>
>> Sent: Thursday, January 06, 2005 9:37 PM
>> Subject: [AMRadio] VFO for 20V-3
>>
>>
>>> I am nearing completion of my 20V-3 for 75M and was wondering what 
>>> VFO's
>>
>> are
>>
>>> available that easily interface with the 20V-3.  I was thinking of a
>>> Meissner but I can still remember its nick name the Signal Drifter 
>>> when I
>>> used one with a pair of 813's back in 1956.  I would appreciate the
>>
>> group's
>>
>>> comments.
>>>
>>> Bob W6TR
>>>
>>>
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>>
>>
>>
>
>
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