Jim,
There is a reed relay that switches the receive antenna input. You can't
hear it unless the amplifier keying relay is disabled. The reed relay
makes a soft "ping" during keying.
Try switching the rcv antenna slide switch on the rear panel a few times
or shooting some contact cleaner into it.
73,
Bob WB2VUF
Jim Reid wrote:
>
> Hi,
>
> Am using my "old" Corsair II while I wait patiently for
> am Orion on order.
>
> Have been noticing that the rcv signals grow weak
> after a bit of time. A couple of quick "pops" on the
> PTT button, and bingo, back up comes the rcv'd
> signal. There is no linear in use, nor any connection
> to a linear and its' T/R relay through which both rcv
> and xmit signals would pass.
>
> In looking through my old Corsair manual, it seems all
> the T/R switching done using several diodes, thus the
> smooth and fast QSK. However, I do hear a relay
> clicking which the PTT button is pressed -- I assume
> this is the relay which would actuate a linear were I
> using one. But, certainly the rcv signal does not
> pass through that relay.
>
> So what is going on? Or is there a relay someplace in there
> through which the rcv signal is passing which whose contact
> can be, at least briefly, cleared by a couple of actuations
> of the PTT switch, or CW key?
>
> Seems odd that a diode in the T/R switching arrays would
> fault in such a way that the symptom I have would occur,
> but who knows?
>
> 73, Jim KH7M
>
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