[R-390] New R-390A owner

[JAMES T BRANNIGAN]

I use the R-390A as a second receiver with an S-line driving a 2KW amp.
The receivers are fed thru an Ameco pre-amp (usually off) with 2 RX outputs.
T/R switching is handled by the 32S-3 at the 100W level and MUTE is
controlled by the 32S-3 T/R control line.  Sidetone is built into the
S-line.
Using another antenna I can listen to B/C on the R-390A and transmit at the
same time.

Jim

> On Sat, 1 Jun 2002, Roy Morgan wrote:
>
> > At 08:45 PM 6/1/02 -0400, Ronald Davis wrote:
>
> > >   if it is possible to run a QRP transmitter and use the R-390A
> > >as a receiver?
> >
> > >  I am wondering if the 5 watts would harm the
> > >front end of the R-390A?
> >
> > No, it probably won't
>
> The operative word here is probably. When I was a Navy
> radioman aboard light cruisers, we had two 500 watt
> HF transmitters keyed continuously. The receive antennas
> were at some distance from the transmitting antenna, but
> we could light a small floresent bulb by touching one
> lead to the rx antenna jack. The ET's replaced open RF coils
> on the R-390's with some regularity. 5 watts with close
> spaced antenna may not be completely safe.
>
> >
> > >Also is there a way I can mute the receiver of the
> > >R-390A while im transmitting.
> >
> Roy described the 390 break in very well, but note that
> it mutes the receiver completely. Using an external relay
> on the receive antenna to short it and disconnect the rx
> would have the advantage of being able to monitor your
> own keying with the 390. I find it hard to send CW without
> hearing myself send - of course, I find it hard to send
> CW even if I can hear my own keying :)
>
> John   KK6IL