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" <[EMAIL PROTECTED]>
To: "Bob Maser" <[EMAIL PROTECTED]>
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" <[email protected]>
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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