[R-390] R-390A ....more AGC

[windy10605@juno.com]

I still have a problem with the carrier meter repeatability, crank
the RF gain down and back up and you get a completely different 
reading. Zeroing the meter varies also ...it's OK for a while, then
it's off again. Anyone experience that ? 

Got tired of the signal blanking and carrier meter kick when you 
switch from "Low" to "Med" AGC. Installed a 10V MOV from 
the AGC terminal screw to a ground screw on the back of the unit.
Minimal kick and blanking and no ill effects observed. Would have
liked a nominal 10V DC MOV but the smallest one Fry's has is the 
10V MOV which has a nominal 18V DC clip level. Lot better than
the over -100V spike when you dump the 2mfd capacitor. Zeners
were a tradeoff between peak current capability and minimum
series resistance. Never found a good match. At least MOVs have
no problem with that level of energy.

73  Kees K5BCQ