|[AMRadio] Oil filled capacitors|
AAR7IR - Mo MARS
AAR7IR at Hotmail.Com
Thu May 22 22:59:25 EDT 2008
My dad (KBØTLZ) who started out on spark gap in the West VA mountains was a
published research chemist for Mallinckrodt. Dad got a ticket after he
retired so he could
talk to his five boys on ten meters.
As you recall we had a huge dioxin issue in Missouri in the 80's.
Pop started his career on the tail end of the Manhatten project at WU in Stl
and he also
smoked for 50 years. He did die of cancer 2 years ago at the age of 83.
Dad said the EPA and the rest of them really didn't know what dioxin did to
but it was a fact that it degenerated in nature with exposure to natural UV.
I just thought I'd pass those words along. I am not a chemist (published or
so I can't validate Dad's words, but most of his contemporaries respected
How have things been going ?
I enjoy your postings.
----- Original Message -----
From: "D. Chester" <k4kyv at charter.net>
To: <amradio at mailman.qth.net>
Sent: Tuesday, May 20, 2008 1:38 AM
Subject: Re: [AMRadio] Oil filled capacitors
>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
> automotive use.
> 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.
> Don k4kyv
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