Electronics > Beginners

What kind of capacitors are these?

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David Hess:

--- Quote from: +Mikie on July 20, 2018, 12:34:38 am ---
--- Quote from: Z80 on July 19, 2018, 11:50:44 am ---I'd say they were mica caps, they look like old micas.  Being used in a substitution box they need to be accurate and stable.  I seem to remember most of the paper caps were cylindrical and as reliable as a 2 week weather forcast.
--- End quote ---

Yeah, my bad. Paper ones were always cilindrical, you could see the layers from the sides. It was fun unrolling them, that's about all they were good for :P
--- End quote ---

They did make rectangular paper capacitors as shown at the first post here for M1 and M2:

https://www.radiomuseum.org/forum/replacing_old_capacitors.html

My ESI impedance bridge uses mica capacitors are shown for M4 at the above link with the colored dots for the oscillator and filter.

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