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

[Jim]

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