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Re: capacitors
- To: tesla@xxxxxxxxxx
- Subject: Re: capacitors
- From: "Tesla list" <tesla@xxxxxxxxxx>
- Date: Sun, 16 Oct 2005 22:27:40 -0600
- Delivered-to: testla@pupman.com
- Delivered-to: tesla@pupman.com
- Old-return-path: <vardin@twfpowerelectronics.com>
- Resent-date: Sun, 16 Oct 2005 22:28:22 -0600 (MDT)
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Original poster: "Malcolm Watts" <m.j.watts@xxxxxxxxxxxx>
On 15 Oct 2005, at 17:42, Tesla list wrote:
> Original poster: Ed Phillips <evp@xxxxxxxxxxx>
>
> " Usually, mica
> caps are not good for Tesla work because they tend to overheat (power
> dissipation factor >1%) and the dielectric is brittle and not self
> healing."
>
> Something wrong there. Good mica caps have a very low dissipation
> factor (<0.001) and work great for RF as long as you don't exceed
> their voltage/current/frequency ratings. I have an 0.006 ufd 30 kV
> Sangamo capacitor which works just fine with a 15 kV NST and suitable
> gap. Wish I had about 3 more. Mica capacitors were used for spark
> transmiters for many years with great success.
>
> Ed
I built and sold a small TC using Sangamo mica primary caps about six
years ago. It is still in use and still works.
Malcolm