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Re: [TCML] Capacitor differences
Hi Miles,
Although the CD 940C caps use self-healing metalized film, they do not
use metal foil to provide a low resistance connection to the wire leads.
Instead, they use sprayed metal to contact the thin metalized layers. As
a result, they do not handle high currents very well. In Tesla Coil use,
they'll rapidly overheat and fail. The 942C caps use foil and metalized
film to create more robust end terminations, while still retaining
self-healing technology.
Back in the early days of MMC development (2003) Terry Fritz conducted a
number of tests to confirm which capacitor types performed well, and
which did not. He found the following:
Old numbers don't reflect the conpemporary state of the art.
"Thumper", presently the worlds largest DRSSTC, and current DRSSTC spark
length record holder,
Utilizes 100pcs 240C12W1P5K-F, 10 strings of 10.
Good for 9420Apeak, and 201Arms, The caps don't get warm and they don't
fail, at peak currents of up to 6000A.
Voltage/capacitance combinations, found in a classical tesla coils may not
be straightforwardly configurable, though.
Cheers, Finn Hammer
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