[R-390] Reduced 500-1000KHz sensitivity

[Tisha Hayes]

I had the same problem with the 2-3 MHz band, it would have reduced
sensitivity (more like deaf) and I could jiggle the MHz knob and it would
come back.

I am not certain exactly what fixed it as I had to pull the RF deck but I
checked the alignment of the multi-stage rotary switch under the RF deck and
the multi-stage rotary under the crystal deck.

I cleaned up everything (Q-tips and DeOxIt) and jiggled the alignment some,
checking what contact tabs were closed at each rotary position and when I
reassembled the receiver the problem "went away".

Not very scientific, not very definitive but it worked. Took about a half
day to pull the deck, flip it on it's back and roll through all of the
positions, cleaning as I went and to put it back together again.

I did not have the satisfaction of pointing at a specific part or connection
and saying "aha!".

-- 
Ms. Tisha Hayes/ AA4HA
-
Optimist: *The glass is half full.*
Pessimist: *The glass is half empty.*
Engineer: *The glass is not sized correctly AND we need a backup system.*