 a question about steves micro sstc
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Stuart G.
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Wed Nov 21 2007, 08:53PM
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Registered Member #495
Joined: Thu Nov 09 2006, 01:29PM
Location:
Posts: 11
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I'm about to build my first tesla coil and was thinking about using steve's micro sstc circuit
however I was woundering why c3 has such a high voltage rating
anyone know why?
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Mates
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Registered Member #1025
Joined: Sun Sept 23 2007, 07:53PM
Location: Czech Rep.
Posts: 566
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Stuart G. wrote ... I'm about to build my first tesla coil and was thinking about using steve's micro sstc circuit however I was woundering why c3 has such a high voltage rating anyone know why?
First: The inductance of the primary rises the voltage a lot...
Second: The ability of the cap to handle AC volatage goes down very rapidly with the frequency...
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Steve Ward
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Registered Member #146
Joined: Sun Feb 12 2006, 04:21AM
Location: Austin Tx
Posts: 1055
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Mates has it pretty much right. The voltage spikes are around 400V peak, and that they occur at a frequency of ~700khz, i went with an overbuilt ceramic cap there. Its really not a physically large device though and 1nF ceramic caps are very common in TVs and monitors (of the CRT type).
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