[TCML] MO Capacitors

[Bill Noble]

instead of spending $200, start scrounging - there must be surplus stores, 
there must be manufacturers of stuff that use capacitors - I once bought 
10,000 capacitors (if I remember right - it filled my car with boxes) for 
$40 - a bunch of folks on this list got them from me for various prices 
starting at $5 per bag of 100 - as my supply dwindled, I raised the price 
until the last 100, which sold for as I recall, around $25 or $35 per 100. 
My point here is that you can find what you want cheaply if you look.  And, 
even if you find it in the US, shipping a box full of capacitors from the US 
to you will cost $40 or so (USPS flat rate box), so you can find them here 
in the USA and have someone on the list repack and ship to you if the vendor 
won't ship internationally.  For your purposes all you really care about is 
cost and the dielectric - everything else is variable - you can parallel 
more if the capacitance is low, you can put more in series (or less) 
depending on voltage, so you really can use "almost anything", so long as it 
is of the right type.  Getting the word to surplus stores that you want a 
quantity of caps may let them pick something up for you at a much better 
price than trying to buy it cold.

--------------------------------------------------
From: "andrew" <andrew at customcomputers.co.nz>
Sent: Monday, November 30, 2009 12:29 PM
To: "'Tesla Coil Mailing List'" <tesla at pupman.com>
Subject: RE: [TCML] MO Capacitors

> Many thanks for replys re MO caps.
> I see they are used a bit in level shifter psu's sometimes.
> As for me, I am leaning back towards an mmc. I was just a bit reluctant to
> spend $NZ 200
> to build one if I didn't need to!
> Cheers
> Andrew
>
> -----Original Message-----
> From: jimlux [mailto:jimlux at earthlink.net]
> Sent: Saturday, 28 November 2009 4:08 a.m.
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] MO Capacitors
>
> andrew wrote:
>> Hi
>> Has anyone had any experience good or bad, using microwave oven
>> capacitors (approx 1mf, 2000v) in series for a tank cap in a Tesla Coil?
>>
>> Cheers
>>
>> Andrew Buxton
>> Noobie Kiwi
>>
> Not what you want.
>
>
> Too much capacitance, designed as a DC filter capacitor (at line 
> frequency,
> 50-60 Hz) and has very high loss at the several hundred kHz in a tesla 
> coil.
>
>
>
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