[R-390] R-390A Restoration Progress (at last)

[Richard W. Solomon]

I rewire the AC input to eliminate the RF Filter. Radio turns on
and makes noise. AF Gain control scratchiness eliminated by just
running pot back and forth several times.

I can hear WWV on 10 Mc (yeah !!) with a short wire, but as I
cycle through the B/W positions I notice the 4 Kc position has
a marked reduction in level (audio out). I removed the module
and gave the switch a shot of De-Oxit and I'll try it again tomorrow.

Hopefully the Mechanical Filter is OK, but what are the odds that
one or both Silver Micas are bad ? Would you recommend I just replace
both of them ? I suppose if I replace them both and still have the
lower level then the Filter must be kaput. I don't see any need for
4 Kc anyway !! Too narrow for AM.

Comments ...

73, Dick, W1KSZ