RE: [TCML] VACUUM CAPACITORS

["Michael Creigh" <creigh@xxxxxxxxxxx>]

Thanks, I didn't really click onto the small capacities of these, but that
makes complete sense. I always wondered though if the larger ones could be
used in pulse applications as the dielectric doesn't get damaged in pulse
situations. A variable one would be a good way to tune a coil while running
instead of always stop starting as we have to. I also thought about building

my own variable capacitors with polypipe as the dielectric, wrapped on the
outside with foil and a length of aluminium pipe on the inside. Sliding it
in and out would change the capacitance.

Regards,
 
Michael Creigh

-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of DC Cox
Sent: Wednesday, 29 October 2008 2:42 PM
To: Tesla Coil Mailing List
Subject: Re: [TCML] VACUUM CAPACITORS

perhaps only for a very small vacuum tube coil.

main reason is the capacitance is usually too low and the units with higher
capacitance are very large physically.
this is due to the fact they use only air as their dielectric.

Dr. Resonance




On Tue, Oct 28, 2008 at 7:22 PM, Michael Creigh <creigh@xxxxxxxxxxx> wrote:

>
> Just wondering about these variable vacuum capacitors you see around. Are
> they any good for tesla coil use, and if not then why?
>
> Regards,
>
> Michael Creigh
>
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
>
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla

_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla