[R-390] Can I stay?

[DJED1@aol.com]

Tapping into the audio works OK, that's what I did with my outboard (SS) 
product detector.  Also tapped into the diversity AVC to provide the fast 
attack needed for SSB.  Thus the audio controls and the meter work, as does 
the AVC switch and carrier meter.  The only problem you may have with the 
commercial unit is the voltage level- you need several volts RMS to drive the 
audio and over 10 VDC for the AVC.  I built output stages operating at 28V to 
drive the terminals on the R-390A.  My only unhappiness with my rig is that 
the BFO is not nearly as stable as the R-390A.  That's one reason I'm doing 
another version which will have a 100 Kc IF and crystal BFO.
Ed