[R-390] New R-390A owner

[John Kolb]

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