Allan, a few troubleshooting thoughts off the top of my head:
Your late model Corsair has the keying loop so do you have the rear panel
jumper installed between TX OUT and TX EN? Did you advance the DRIVE
control so the ALC indicator lights on key down? After that, I would go
through the rig and apply a good contact cleaner (DeOxit) to all the
connections. If that doesn't fix it, I would check the BFO oscillator,
described in the manual on p3-21. Check the oscillator frequency in the
"LOCK" position (step 3). I do this with a general coverage receiver with
accurate readout in lieu of a freq counter.
73/GL,
Barry N1EU
On Fri, Oct 31, 2014 at 12:03 AM, Allan Taylor <k7gt.cw@gmail.com> wrote:
> Reflector folks:
>
> We are working on a late model Corsair II that I purchased last fall but
> never had occasion to turn on until May. It didn't work, had other things
> to
> do... Anyway, we have figured out why no CW receive (no BP filters
> operative
> in CW) and fixed it (reattached jumper around 1.8 filter slot). But we
> found
> that CW and LOCK don't transmit while SSB does. We think we have narrowed
> the problem down to the balanced modulator board but haven't gotten past
> that point.
>
> Does anyone have some specific suggestions that would apply to this
> problem?
>
> --
> 73 Allan K7GT
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