[AMRadio] WTB Both chokes and AF gain for 75A-4

[Donald Chester]

The AF gain pot is 500K, logarithic (audio) taper.  Should be easy to 
find a replacement or salvage from an old piece of audio equipment. 
Mine was noisy.  Tried contact cleaner but that only fixed it for about 
a month and it became scratchy again.  Then I sprayed it with WD-40, and 
it has worked perfectly ever since.  That must have been 10 years ago.

Don k4kyv