[R-390] New R-390A owner

[JAMES T BRANNIGAN]

Ron,
You don't mention the kind of CW operation you are contemplating.
For anything but very casual operation the R-390A needs help.
A good DSP audio filter for starters.  Turn off the AGC, audio near full and
ride the RF gain.  Forget Break-in, because the recovery time is too slow,
same for monitoring CW.  Even 5W will blow your ears off.  Inject a sidetone
oscillator in the audio chain.

With 5W a small relay can be used for antenna switching and muting.

The last problem is tuning speed.  The R-390A tunes much too fast for CW (or
SSB) A 5:1 vernier is a good compromise.  The problem is finding one, or
shimming it,  to fit the undersize shaft.

Jim


> > --- Ronald Davis <RDavis24@carolina.rr.com> wrote:
> > [can I] run a QRP transmitter [with] R-390A as a receiver?
> > I have two different antennas but they are close in one point
> > [would] 5 watts ...harm the front end of the R-390A?
> > Also is there a way I can mute the receiver