[R-390] R-390 SSB Product Detector mods?? Not A

[Gord Hayward]

There are lots of outboard ones that use the IF out.  No mods required 
and no
A or non-A issues.  Mine uses 2 balanced modulators with the split BFO 
fed 90
degrees shifted. The effect is SSB stereo.  Of course it does nothing to 
the SSB
signal but it really changes the noise.  Instead of a hiss it sounds 
like a waterfall
in 3D.  Less tiring and almost pleasant.

The AGC is likely a soure of grief but there are mods available, or use the
terminals on the back to supply your own from the detector system.

Have fun.

Cheers, Gord VE3EOS

-- 

Gordon L. Hayward, Ph.D., P.Eng.,
Associate Professor, Biological Engineering,
School of Engineering, University of Guelph,
Guelph, Ontario, N1G 2W1.