Weird capacitors???

[greenacarina]

In my various scavenging ventures I've come across some odd looking caps


They look like a roll of foil in a glass case. Are they particularly good for anything, or especially crappy?
Thanks.
Chris

[jonathan perez]

polystyrene!

good stuff. what values do you got?

[Peter Snowberg]

Polystyrene are some of the best caps out there. Their only downsides are cost (unless you're recycling ) and sensitivity to heat.

[rockgardenlove]

People use these for wahs I've seen, eh?

Are they made new still?  Anybody got a handy Mouser pt. #?

[markm]

I've recycled a few of these but, the ones I've gotten have been chicklet shaped not round 

[MikeH]

What did you get these out of?

[greenacarina]

They came from a 70's all-in-one home stereo. Got a bunch of GE trannys as well.
Will have to look and see what values are there.
Chris

[Ronsonic]

Those are polystyrene caps.

Good: great spec's, sound and ratings.

Bad: they fail as noisy or intermittent and fail more often than other caps.

Best for tone networks and I use them on the input of the treble boosters I build.

Ron

[Barcode80]

my SD-1 has a bunch of these, i thought they were mica  hmm, i might have some old 70's electronics lying around... maybe time for a scavenger hunt.