[Lowfer] Question on building homebrew variable caps...

Mon, 11 Nov 2002 19:53:46 -0600

Yep, I already have the big doorknob caps for the fixed portion. Bill says
that the variable cap will only have 1/2a running through it anyhow. So I
should be fine with one of my air variables with some of the suggested brush
mods to eliminate the losses there. I shall try to convince the XYL to buy
me a nice vacuum variable for Christmas. There have definitely been some
ideas today on this cap building. Thanks to all of you guys for your great
suggestions.
73's,
Mike>WE0H
http://www.we0h.us/lf.html

-----Original Message-----
From: [email protected] [mailto:[email protected]]On
Behalf Of BOB RIESE
Sent: Monday, November 11, 2002 7:05 PM
To: [email protected]
Subject: Re: [Lowfer] Question on building homebrew variable caps...

Ralph is correct. The Spark rig ran low power driven by an ignition
transformer
the Tesla coil with a pr. of 811as made lots of glass pieces. Tried
everything and settled on
a cap that was good for the voltage and current.. big door knob  BIG

Bob  K3DJC

>
>A quick trip over to one of the more serious Tesla Coil lists will
>provide you with a wealth of HV RF capacitor construction info.  Most
>of
>it, of course, is aimed at building plastic insulated, oil filled
>caps
>of up to 0.05 Uf rated to withstand 30 KV RF pulses without expiring.
>Nevertheless, the concepts used are applicable to LF uses as well.
>
>73,
>
>Ralph   W5JGV / WC2XSR / 13
>
>The current On-The-Air status of WC2XSR/13 is available at:
>http://home.att.net/~shmrg/wc2xsr-13_log.htm
>
>My 600 Meter Research Group files are at:
>http://home.att.net/~shmrg
>
>My Home Page is at:
>http://home.att.net/~ralph.hartwell
>Home of the Rife Biomedical Research Web Ring
>
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