Re: Caps

• To: tesla-at-pupman-dot-com
• Subject: Re: Caps
• From: David Trimmell <davidt-at-pond-dot-net> (by way of Terry Fritz <twf-at-verinet-dot-com>)
• Date: Thu, 01 Apr 1999 18:31:02 -0700
• Approved: twf-at-verinet-dot-com

I have used ceramic caps in a small coil several years ago (30KV -at- 0.004
uFd), they worked ok for the power level. I was able to get 13 inch sparks
at 225 watts, using three series gaps at 7500V. They did get warm, but not
as fast as the gaps (no forced air cooling)! They make excellent RF bypass
caps, though.

Regards,

David Trimmell

At 05:57 PM 3/31/1999 , you wrote:
>Original Poster: Alex Crow <user-at-alexcrow.clara-dot-net> 
>
>Kevin
>
>It is possible, but they are high-loss and show poor stability vs. temp.
>They are not as strong as Polypropylene caps - refer to previous messages
>about MMCs (Multi mini caps) as well. The ceramic ones may heat up
>substantially, change their value and thus detune your primary. I have also
>heard of problems with reliability. You could try them, but you may need an
>oil bath to keep them cool, and one person I remember who used them reported
>that his sparks were much more spindly and violet-coloured compared with his
>home-made PE cap.
>
>Alex
>
>Tesla List wrote:
>
>> Original Poster: vitesse-at-primenet-dot-com
>>
>> Hello,
>>
>> Will a ceramic capactor work in a Tesla coil if it has the proper voltage
>> rating?
>>
>> Thanks
>> Kevin
>
>
>

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