|[AMRadio] VFO for 20V-3|
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.
> ----- 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
>> 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
>> tube through a capacitor.
>> You would pull out the oscillator tube, of course. Perhaps, a Heathkit
>> VFO - being more common - would work.
>> Dave, W3ST
>> Publisher of the Collins Journal
>> Secretary to the Collins Radio Association
>> 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
>>> 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
>>> Bob W6TR
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