[R-390] New (to me) R-390A Can't Tune SSB

[Joe Foley]

Try reducing the RF gain.

Joe





--- On Sun, 1/31/10, Jim <jbrannig at optonline.net> wrote:

> From: Jim <jbrannig at optonline.net>
> Subject: Re: [R-390] New (to me) R-390A Can't Tune SSB
> To: "Jerry Stern" <jsternmd at att.net>, R-390 at mailman.qth.net, "'Collins CCA Reflector'" <collins at listserve.com>
> Date: Sunday, January 31, 2010, 11:21 AM
> Can you tune in CW signals or use the
> BFO to beat against the CAL signal?
> If yes:
> Set BANDWIDTH to 8 (for starters)
> Reduce the RF GAIN until the CARRIER LEVEL stops bouncing
> Set the BFO for + or - 1 or so....
> Tune carefully and adjust the above as necessary.
> 
> Jim
> 
> 
> > Just got a very nice R-390A and the receiver appears
> very sensitive but
> > I cannot tune in SSB signals. Weak or strong stations
> are just garbled
> > as if the radio is on the wrong sideband. I have
> checked for any loosely
> > seated tubes and the usual tapping around to see if I
> can find any
> > microphonics or signs but to no avail.  The BFO
> does seem to be
> > functional, at least to my ear, but I guess the
> problems would still be
> > likely in this stage?  I will start changing
> tubes but would appreciate
> > any other diagnostic advice.  I wouldn't bother
> the list for this
> > question but I cannot find any way to search through
> the R390 archives.
> > 
> > 73 Jerry
> > 
> > K1JOS
> 
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