[R-390] Orange Drop vs ceramic disc

[Ben Loper]

I started looking over the inside of my 75A-2 and I have at least 5
different kinds of caps.  I'm leaving the micas alone.  I already noted
several black beauties.  I'm thinking that any caps tied to ground I'll
replace with a disc and maybe use a OD for anything that is a coupling
capacitor.  I don't have a lot to replace so I have time to look at it in
the circuit and decide.