[R-390] Gain drift

[dog]

Well I had it on for about 6 hours today and no sign of the gain 
changing all that much. With the AGC jumper disconnected the Carrier 
meter is very sensitive over a small delta rf and with the same input it 
changed from 50 at startup to 25 later on and finally back to about 65. 
Changing the sig gen just a few uV will bring it back to 50. Once the 
AGC is in play that will change. I saw no difference on the plate of 
V504 nor the -9VDC diode load output nor the audible noise from the 
diode load. Tomorrow I'll hook up the RF section and put the RX back in 
order and see what it does from the balanced ant input.

Dave