[AMRadio] VFO for 20V-3

Bob Maser bmaser at tampabay.rr.com
Thu Jan 6 20:58:32 EST 2005

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 
> 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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