[R-390] The second 390A

[dog]

For the most part the thing is now working. I stopped getting obsessed 
with measuring all the oscillators and just plugged the sig gen in the 
balanced port and I have signal except at 28MHz. Not sure what that's 
about since all the 2nd xtal oscillators work. I need to tighten up the 
spring on the Oldham coupler and I'm sure it's still not as sensitive as 
it should be but I also notice while changing the MC knob, the volume 
goes up and down, not always on the detent. Might need to pull the RF 
and clean and register that bandswitch. It may need a good RF alignment 
also. I just can't remember what I've done to this thing because it's 
been apart for so long. The mechanical filters are sort of a kludge too, 
repairing them was not completely successful. Starting at 4KC and lower, 
the signal decreases noticeably but they do have the correct BW. I did 
also find a bad RG58 cable I've been using, it produces a lot of noise 
in the RX when plugged into the antenna. The BNC connectors are probably 
loose or there's a break in the cable somewhere.

I have a mod on the carrier level meter adjustment using the original 
pot and want to try that. I did install a 10 turn pot in the other one. 
So there's plenty to do, as well as start mowing the 20 acre field in 
this heat. I better get started before it gets too  hot.