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Hi group,

Does anybody know where I can get a copy of the full service manual
for a Comcal TRA922 manpack?

This is the crystal controlled version of the TRA921, covering 2-8
MHz, LSB, USB, AM and CW.

I currently have some circuits and a few sheets of the manual, but
need more information so that I can do a proper fault-findings and
alignment.

Regards,
Norman.

Norman,
Some time ago I had a schematic for one but I fed it into our
company's data that were starting to sell Military packsets. Engineers
spent MONTHS trying to figure what piece of equipment that schematic
was for.
I've retired now but don't think I could ask them for my schematic to
be returned.
Jim VE3DDY

Hi Jim,

Thanks for reading the question and replying. Hopefully, somebody out
there has the full service manual. I have the circuits but I need to
know the specification limits before I start adjusting things. I would
hate to blow the PA. The set I have has a much lower output on LSB.
Question is, is it the LSB that is low, or the USB that is high, or???
I think something might be a little funny in the modulator as well.
Hence the need for a manual.

Regards,
Norman. G8PLL.

--- In Racal-manpacks@..., "bambazonke01" <jimandruth@...>
wrote:

Norman,
Some time ago I had a schematic for one but I fed it into our
company's data that were starting to sell Military packsets.

Engineers

spent MONTHS trying to figure what piece of equipment that schematic
was for.
I've retired now but don't think I could ask them for my schematic to
be returned.
Jim VE3DDY

Norman,

If the 922 is merely the crystal version of the 921, then I would expect the manual for either set to be useful for what you want. Chances are that the modulator, drivers and PA stages are the same for both sets.

Maybe the service manual for the 921 is just as hard to find though.


73s

Richard
G7RVI

norm_bam wrote: