[R-390] Gain drift

[dog]

Thinking about it today it seems like maybe I should just replace what I 
can in the plate circuit of V504, even in the transformer. Don't know 
what else to do.

In the meantime I repaired the 2KC filter from the other module, put it 
back in the other IF module so now I need to do some checks on it and 
try it in the RX. As I remember it too had some issues. All the 
pertinent caps are replaced in it too. Took me all day to get the filter 
back in with all the wires I had disconnected to get the filter out and 
also to find the issue with that filter. The filter is one that I 
replaced the innards with a plastic Collins 2KC filter of the same 
general specs. It's made the same way, just a plastic box. Not sure 
where the short was, but it seems OK now. I'm sure one of those #40 
wires from the coil to the contacts inside shorted to ground. I replaced 
them with #30 enameled wire. 40 is just too small for me to work with 
anymore.