[R-390] Gain drift

[dog]

Larry,

The 10dB jump measurement is on the plate of V504 on the mVmeter. I'm 
pretty sure the grid doesn't do that. A snap is typical when touching 
either the grid or plate with the probe. I've notice before when the 
gain jumps it's usually accompanied with a snap, but usually it's 
because of an interruption it the RX like switching from MGC to AGC or 
turning on the noise limiter or the like. No, I haven't been monitoring 
the voltage on the plate of V504. I was thinking about doing that very 
thing.

And yes, I'm still getting a bit of drifting around in the CL meter with 
constant input in AGC mode, but not like when the AGC line was disconnected.

Another thing I've noticed is sometimes when I switch the BFO on it's 
like the AGC has been whacked out and it takes a second or more to 
recover. I don't remember this happening before.

Although I've got the 2KC filter back in I notice I have a lot of loose 
connections in that module that I unhooked searching for the short in 
the AGC line (the filter). So I've got a bit of work and checking to do 
yet to get that module working. Might get it done today.

Wife helped me pull that filter apart, I used a small butane torch and 
she pulled on the cap. I had to wrap a wet cloth around the label to 
keep from melting it. It finally came out. It's easy enough to solder it 
back on with a decent iron.

Dave N3DT