Author Topic: Where to buy Tesla coil capacitors?  (Read 1124 times)

Offline jpb133

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Where to buy Tesla coil capacitors?
« on: May 07, 2019, 05:31:12 PM »
There used to be loads of cornell dubilier 942c capacitors and others ideal for tesla coils all over ebay, but sadly I see few to none now.

Where are people supposed to find good tesla coil capacitors?

I'm building a dual MOT coil with no doubler or ballast and need about 100nf. The only one on ebay that looked like it might work was this one:

https://www.ebay.com/itm/LARGE-0-1-uF-25-KVDC-Energy-Pulse-High-Voltage-Oil-Poly-Capacitor-Tesla-Coil/222390242989?hash=item33c77dcead:g:zSkAAOSw241YisCL

Does this seem like it would work? Any other suggestions?
« Last Edit: May 07, 2019, 05:40:12 PM by jpb133 »

Offline Hydron

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Re: Where to buy Tesla coil capacitors?
« Reply #1 on: May 08, 2019, 11:55:00 AM »
If you can't tell what dielectric it is using, don't buy! Anything that isn't polypropylene is unlikely to be worth using.

Unfortunately I can't help much picking spark-gap coil capacitors, only had experience with caps for DRSSTCs (which have more options available due to lower peak currents).

Offline sjsimmo

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Re: Where to buy Tesla coil capacitors?
« Reply #2 on: May 08, 2019, 01:29:47 PM »
Condensor Corps website shows how to check what type of dielectric the capacitor is using:http://www.condenser.com/projects/condenser/

It is a Kraft/Polyester not polypropylene, so it's probably not suitable.
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Offline MRMILSTAR

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Re: Where to buy Tesla coil capacitors?
« Reply #3 on: June 14, 2019, 06:10:11 PM »
Go to "pupman.com". This is the original TC site. Post a request for anyone wanting to sell pulse-rated capacitors such as Maxwell or CD. You may find some. I have bought some myself through "pupman.com".
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Retired electrical engineer

Offline Mads Barnkob

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Re: Where to buy Tesla coil capacitors?
« Reply #4 on: June 17, 2019, 10:46:56 AM »
I used to participate in group-buys directly from digikay, so we all could get a better price when buying a total of 500 caps: https://www.digikey.dk/product-detail/en/cornell-dubilier-electronics-cde/942C20S15K-F/338-3958-ND/1929493

I have a spare MMC, made from 942C capacitors that I would be willing to sell, depends on your location if it is worth shipping, it is the original for my large DRSSTC, but I never used it before upgrading to large GTO snubber caps. You can see if you scroll down to "14th May 2012" here: http://kaizerpowerelectronics.dk/tesla-coils/kaizer-drsstc-iii/
http://www.kaizerpowerelectronics.dk - Tesla coils, high voltage, pulse power, audio and general electronics

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Re: Where to buy Tesla coil capacitors?
« Reply #4 on: June 17, 2019, 10:46:56 AM »

 


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