[Johnson] Viking II-CDC

[Kenneth]

So true they are getting insane prices for R390A on Ebay so the spares are
getting to be like gold bricks as well. If these R390A ever get valuable
enough to get me a Harley Davidson then My R390A is gone. 8^)  I notice Fair
Radio sale has the BC-221N for $65 bucks complete all you would have to do
is mate it with a good power supply and at the very least you would have a
fine piece of test gear.  Building some kind of matching unit to go between
it and your rig and you would have your VFO.  But you know something for the
WARC band using AM, and CW you have a limited frequency range for these
modes I would think it would be easier to just get crystals for those
frequencies and be done with it they can be rubbered a little so you would
not have an absolutely fixed frequency. At least you wouldn't have to worry
about having an unknown harmonic spur floating around from a homebrew setup.

                           Ken be W7ITC

-----Original Message-----
From: johnson-bounces at mailman.qth.net
[mailto:johnson-bounces at mailman.qth.net] On Behalf Of David C. Hallam
Sent: Thursday, December 29, 2005 1:17 PM
To: Johnson at mailman.qth.net
Subject: RE: [Johnson] Viking II-CDC

While those PTO's are not particularly hard to come by, they are not exactly
inexpensive selling for well over $100.

David
KC2JD

-----Original Message-----
From: johnson-bounces at mailman.qth.net
[mailto:johnson-bounces at mailman.qth.net]On Behalf Of Kenneth
Sent: Thursday, December 29, 2005 2:19 PM
To: 'Ed Tanton'; 'Walter Treftz'; Johnson at mailman.qth.net
Subject: RE: [Johnson] Viking II-CDC


I was looking at a 1956 issue of the Radio Annual in it has info on building
a VFO using a Collin's PTO.  The PTO used was the one out of the 75A series
receiver.  I see Fair Radio presently has PTO's from the KWM
series transceivers for $75 Dollars.  It should not be to hard to track
down a PTO for either a R388 (51J) or an R390A receiver, which is more like
the one used in the article.  With people who worship Collins 75A receivers
somebody using a Holey Collins PTO for a homebrew VFO might get you
excommunicated. 8^)

                          Ken de W7ITC

-----Original Message-----
From: johnson-bounces at mailman.qth.net
[mailto:johnson-bounces at mailman.qth.net] On Behalf Of Ed Tanton
Sent: Sunday, December 25, 2005 9:31 AM
To: Walter Treftz; Johnson at mailman.qth.net
Subject: Re: [Johnson] Viking II-CDC

Hi Walt... Viking IIs aren't all that rare-I don't know what the
"CDC" means. As for a BC-221... they are designed to be VERY
harmonic-laden-or at least, that's my impression. I wouldn't do it.
If you insist, use a multi-pole BPF tuned to the band you want to use
between the '221 and the Viking II.



72/73 Ed Tanton N4XY <n4xy at earthlink.net>
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