[R-390] Estra Cap in Filter Compartment

[Miles B. Anderson, K2CBY]

I can't say I've ever seen this mod. 

What I have seen is a mechanical 
filter with one pin shorted to the case. (Normally all 4 terminals 
 -- and both the input & output windings are floating.) 
The filter is perfectly good and will work fine except that it drags 
the DC (in my case the AGC bus on the output side) to ground. 

This "mod" sounds like it might be an attempt to cure a problem like that.

Miles Anderson, K2CBY
16 Round Pond Ln.
Sag Harbor, NY 11963
Tel.: (631) 725-4400
Fax.: (631) 725-2223
e-mail k2cby at optonline.net