[Milsurplus] Replacing/rebuilding old stud-mount caps
Barry Hauser
barry at hausernet.com
Thu Jan 12 09:09:50 EST 2006
Hi gang
I have a number of old pre-war and '40's receivers that have three or four
stud-mount filter caps. These include Scotts and Nationals. These are not
electrolytics, but oil-filled paper caps with two insulated terminals and
I'm pretty sure all of them are 4 mfd.
Modern poly's and orange drops don't go up that high, at least none I've
seen listed. Tops seems to be 1 or 2 mfd. Might be a bit messy putting in
a bunch of them in parallel.
Anyone know of a good replacement technique? Would you up the capacitance?
Go with electrolytics?
If they test good, I'm inclined to leave them alone, but I dunno. I do have
one or two cases where the caps are broken. They have phenolic or bakelite
insulators between the can and the threaded mount which is a weak point if
they get rapped -- unlike regular, single terminal stud mount cans where the
can and mounting threads are all metal and solid.
Barry
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