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Re: [TCML] Plastic Capacitors "HG" series
Hi Ben
Your caps use a polypropylene-foil dielectric system and are, in fact,
made to operate in RF and pulse circuits. At one time, you could look at
a Plastic Caps glass-cased cap and tell of it was a DC Mylar cap (Red
color) or an RF polypropylene-foil cap (blue color), but I don't know if
this is still the case today. In any event, a call to the folks at
Plastic Caps would be a good idea, if for no other reason than to get
their catalog and a copy of the data sheet for your caps.
Because of their rigid cylindrical construction and misuse by some
previous coilers, Glassmike style caps have gotten a bad rap. They have
been known to overheat, and even explode, in Tesla Coil use. You may
want to consider enclosing them to prevent flying glass danger and
sprayed oil mess if you plan to use them in your coil.
Bert
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Ben Buxton wrote:
I picked up a bunch of these at a flea market the other day,
specifically HG 140-103 (0.01uF @ 14kvDC).
How suitable are these for coiling? I fried a doorknob cap in my coil
(thanks to cranking the variac up too high), and am thinking of
replacing the tank with these.
According to their site (http://www.plasticcapacitors.com/typehg.html),
they are suitable for RF currents.
Otherwise if they're not suitable, I'll turn them into a Marx generator :)
Ben
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