Dielectric Absorption in Capacitors! Could it be the answer?

[NOSValves]

Man we need help........

[boom3]

Once upon a time, there was a company called Component Research

Corporation (CRC) that made hermetically sealed (glass to metal)

capacitors in teflon, polystyrene, polypropylene and other high-end

dielectrics for the military, NASA, and other critical applications.

They published a very interesting catalog that was an education in the

performance and testing of non-Mylar films. It was available in the old

EEM master parts catalogs (now replaced by the web, I suppose) Their

usual line of caps was cylindrical, in a natural aluminum color, with

the value and other information printed in black ink. If you find any

of these, hang on to them, they're golden. Sadly, CRC went under last

year and I am not sure of who has taken their place in the market. I

don't remember all their dielectric codes but J11 was teflon. Their

tolerences tended to be conservative. All the plus or minus 5 per cent

CRCs I've ever measured (some with lab grade LCR bridges) were closer

to 2 percent tolerance. At the time they were in production, their

speaker crossover value caps were pretty expensive, much moreso than

the GE motor caps. There are still retailers selling CRC caps, one is

DF Sales,

http://dfsales.com