RE: [TCML] microwave oven caps

["Dave Halliday" <dh@xxxxxxxxxxxxxx>]

http://en.wikipedia.org/wiki/Wheatstone_bridge

Replace the battery with an oscillator (100KHz or so). Put your Cap at Rx
and use a pot for R2.

You do not need a sine wave, a 555 chip would work well here.
http://www.talkingelectronics.com/html/SquareWaveOsc.html

Any sort of multimeter (digital or analog) works for Vg

When it zeros out, the resistance of R2 equals the reactance of your Cap at
the oscillating frequency.

Dave
 

> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx 
> [mailto:tesla-bounces@xxxxxxxxxx] On Behalf Of Scott Bogard
> Sent: Tuesday, May 20, 2008 10:50 AM
> To: tesla@xxxxxxxxxx
> Subject: Re: [TCML] microwave oven caps
> 
> 
> Jim,
>      I don't really know how to measure their apparent 
> resistance, and I 
> should mention they will be in parallel with a larger 80 nf maxwell.  
> I'll find a box to protect myself and hope for the best I guess!
> 
> Scott Bogard.
> 
> Jim Lux wrote:
> > Scott Bogard wrote:
> >> Hey all,
> >>      How long can I expect microwave oven caps to last in TC 
> >> service.  I am planning on using 20 in series for 40 kV 
> 50nf rating 
> >> for an experiment (not long runs, unless it works really 
> well and I 
> >> get carried away of course, you all know how that is.)  
> Just curious, 
> >> I don't want to waste them all for a few second run.

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