[Collins] 32S1 crystals

[Gerald]

On Tue, 2005-09-20 at 19:53 -0700, Glen Zook wrote:
> Actually, the 32S- series work fine on CW when the
> heterodyne crystals from the 75S- series are used. 
> All you have to do is to put the Frequency Control
> switch in the "Trans VFO" position.  The spotting
> switch on the 32S-3 series the allows the transmitted
> frequency to be put where ever you want it including
> zero beating the other station.
> 
> On the 32S-1 this isn't possible.  However, I do not
> recommend using the 32S-1 or 32S-2 on CW.  The
> transmitter uses "sidetone" CW generation.  This can
> produce up to as many as 3 signals being transmitted: 
> The first being the desired "faux" CW signal on upper
> sideband.  The second is the "faux" CW signal that
> appears on the lower sideband.  The final signal is
> the residual carrier.  When the 32S-1 and 32S-2 first
> came out the FCC issued all sorts of violation notices
> to amateurs who were using the 32S-1 or 32S-2 on CW. 
> The KWM-2 and KWM-2A suffer from the same problem.
> 
> The earlier versions of the 32S-1, 32S-2, KWM-2, and
> KWM-2A which had a full wave (2 diode) circuit in the
> balanced modulator are much worse where the residual
> carrier is concerned.  Later models of all of these
> units have a 4 diode full wave bridge balanced
> modulator which helps very much with the carrier null.

There is a service bulletin detailing the change for the early
transmitters. I don't recall when I did it, but I know I have had no
complaints from my 32S-1 and one weekend I worked 72 sections on CW
Sweepstakes with it in about 550 contacts. Worked all states that way
too which was my goal.

As you say, run the PTOs separated and do a lot of spotting.

> 
> You can very carefully align any of these sidetone CW
> generator units to eliminate, for all practical
> purposes, both of the unwanted signals.  However, you
> have to "touch up" the alignment on a regular basis to
> keep from having problems.
> 
> The 32S-3 series does not have the problem of multiple
> signals.  These transmitters use true CW and only put
> out one signal instead of up to three.
> 
> As for "split frequency" it is definitely possible so
> long as both frequencies are in the same 200 KHz
> range.  For working SSB DX (like on 40 meters) I use a
> separate receiver (usually one of my 75S-1 receivers)
> to listen to the DX.  Then I transceive with my
> 75S-3A.  I listen for the station that the DX is
> working.  Many times the DX station is actually
> working a "pattern".  That is instead of coming back
> to a station calling on the same frequency he moves
> his receiver frequency something like 50 or 100 Hz. 
> The DX then moves up or down the band for several
> hundred Hertz then goes the other way.
> 
> I can determine in a very short period of time what
> the DX station is doing.  For example, the DX station
> is moving about 50 Hz up in frequency each time a
> station is worked.  I then set my frequency 50 Hz
> above the last station that was worked.  In 9 times
> out of 10 I am the next station worked.
> 
> As a "side note" (and not an advertisement) I do still
> make the interconnect cables for the S-Line (and
> several other manufacturers as well).  The details are
> on the Zcomco website which is listed at the end of
> this message.
> 
> Glen, K9STH
> 
>  Craig Roberts <crgrbrts at verizon.net> wrote:
> 
> 
> Without the crystals, you can't use your transmitter
> independently (which is essential for split frequency
> operation and desireable for CW).
> 
> Glen, K9STH
> 
> Web sites
> 

-- 
73, Jerry, K0CQ, Technical Advisor to the CRA
All content copyright Dr. Gerald N. Johnson, electrical engineer
50 years as a ham today.