[R-390] Break In Operation of R-390 & CV-591 Converter

[Robert Meyer]

When I set my station up (Central Electronics 200V and R-390A), I pondered this
problem to great length.  I can't run full breakin on CW but I did manage to
get some interesting things done.

I connected a pot through a relay to the RF-Gain terminals on the back of the
R-390A.  I have an antenna relay that allows a tiny bit of coupling across from
the transmitter when it's switched to transmit mode (although there's probably
sufficient leakage through coax cables to make this unnecessary.  When the
station is in recieve mode, the RF-Gain relay shorts the terminals on the back
of the R-390A so that I get full gain on receive.

The benefit of this method is that I can get sidetone through the receiver so
that I can tell if I'm getting artifacts on my CW (chirps, etc.), can tell if
I'm drifting, etc.  Also, if I'm using headphones on SSB, I can hear the
side-tone.  This has worked well since 1981.  I imagine if you wanted full
breakin, you could use some kind of solid state switch on the RF-Gain external
pot but I have no idea how fast the R-390A reacts to changes in this gain.

YMMV

'73 de N2DXN
Bob Meyer

P.S. If Paul, K2LMQ is still on list, my old Email died but this one works for
me, now!


--- Joe Foley <redmenaced at yahoo.com> wrote:

> 
> 
> --- "David C. Hallam" <dhallam at rapidsys.com> wrote:
> 
> > Has anyone had any experience operating break in
> > with the R-390 and & CV-591
> > converter.  My set is not fully muting when the
> > break in relay is activated.
> > I can hear the relay(s) pull in and the audio output
> > from the CV-591 drops
> > but I can still hear the station so I gather there
> > is still RF getting
> > through the antenna relay.  Is it just maybe dirty
> > contacts on the antenna
> > relay, or is there something else I need to do?
> +++++++++
> Yes, you'll need to reduce the RF GAIN on every
> transmission, that's why so many RF GAIN pots are worn
> out.  This is a common problem with the R-390's.
> 
> Joe
> 
> 
> 
> 
> 
> 		
> __________________________________________ 
> Yahoo! DSL � Something to write home about. 
> Just $16.99/mo. or less. 
> dsl.yahoo.com 
> 
> _____________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/faq.htm
> Post: mailto:R-390 at mailman.qth.net
> Unsubscribe: http://mailman.qth.net/mailman/options/r-390
> 



		
__________________________________________ 
Yahoo! DSL – Something to write home about. 
Just $16.99/mo. or less. 
dsl.yahoo.com