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Re: Big Time Coil Problems...
Hi Paul,
> Original Poster: pmathus-at-learningco-dot-com
>
> I could be wrong about this, but isn't mica lossy at RF frequencies,
> and a poor choice for MMC use? Terry can probably confirm or deny
> this. I think poly caps are what you want to be using. . . .
Mica caps are a poor choice for MMCs but only because they are
so horrendously expensive. RF-wise, they are an excellent choice.
What do all those old radios have in them?? I was lucky enough to
be given a box full of transmitting micas and two of them are still
going strong in a small coil I sold a year ago despite being thrashed
at their rated voltages.
All my MMCs use polypropylene-foil caps.
Regards,
Malcolm
> And, as everyone else has already pointed out, you probably want
> something closer to .015 uf or bigger.
>
> hope this helps,
>
> paul
>
>
> ______________________________ Reply Separator
> _________________________________
> Subject: Re: Big Time Coil Problems...
> Author: Tesla List <tesla-at-pupman-dot-com> at InterNet
> Date: 2/15/00 8:13 PM
>
> >
> >Original Poster: "Ryan Ries" <spud-at-wf-dot-net>
> >
> <snip> Our caps are mica transmitting caps >in series to make .00325µf at
> 20Kv.
> I believe this is where we are going >wrong. We can get no output at all
from
> the coil no matter what. Do we >just need a better capacitor system to
> fix the
> whole thing? <snip>
> >
>
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