[Prev][Next][Index][Thread]
Re: toroid capacitance
>Date: Sun, 10 Nov 1996 22:31:18 -0700
>From: Tesla List <tesla-at-poodle.pupman-dot-com>
>To: Tesla-list-subscribers-at-poodle.pupman-dot-com
>Subject: toroid capacitance
>Reply-to: tesla-at-pupman-dot-com
>
>>From chip-at-poodle.pupman-dot-comSun Nov 10 22:30:55 1996
>Date: Sun, 10 Nov 1996 21:52:15 -0700 (MST)
>From: Chip Atkinson <chip-at-poodle.pupman-dot-com>
>To: Tesla List <tesla-at-poodle.pupman-dot-com>
>Subject: toroid capacitance
>
>Greetings,
>
>How does one measure the capacitance of a toroid? The only way I can
>think of doing so is to measure the inductance of a secondary without the
>toroid, and then attach the toroid and measure the frequency of
>resonance. From this, work backwards to get C. Any other ideas?
>
>Chip
>=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> Chip Atkinson
> http://bhs.broo.k12.wv.us/homepage/chip/info.htm
> --- Everyone is someone else's weirdo. ---
>=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Chip,
To determine the equivalent capacitance of an unknown topload I
install it on the secondary resonator and using a signal generator and
o-scope, measure the Fres of the combo. Then I remove the topload
off the resonator coil and attach a vacuum variable cap to the hot
end and ground. I tune the variable cap until I achieve the same
Fres and then after disconnecting this cap from the coil, using a
capacitance meter, I measure the value of the variable capacitor at
the chosen setting.
rwstephens