[Collins] 32S1 crystals

Jim Brannigan jbrannig at optonline.net
Wed Sep 21 19:25:52 EDT 2005


Yes to all below......
additionally:
If you want to work Xcv with the 32S-3 and a 75S (particularly with a narrow 
CW filter) you need to add a 455.00 crystal to the CW position in the 32S-3.

Jim


> 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 dsired "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.
>
> 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



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