|[AMRadio] Oil filled capacitors|
k4kyv at charter.net
Tue May 20 01:38:33 EDT 2008
I ALWAYS mount mine terminals up. I have seen too many oil leaks to trust
doing it otherwise.
One of the reasons that the EPA is so paranoid about PCB is that it gives
off dioxin when it burns. They are worried that the building might catch
fire and incinerate the oil.
Except for burning it at high temperature, the toxicity of the oil has been
blown out of proportion. Until some time in the late 50's or early 60's,
brake fluid reportedly contained PCB to make it hold up under high
temperature. The amount that has leaked into the environment from radio
capacitors and transformers is a drop in the bucket compared to its
The property of PCB that makes it so useful is that it is an excellent
electrical insulator while a good conductor of heat. Usually, a substance
that is a good heat insulator is a good electrical inulator (glass for
example) while a good conductor of heat is also a good conductor of
electricity (copper and other metals is a good example). That makes it an
excellent dielectric for capacitors and transformers. It is also effective
in conucting heat away from brake components.
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