Author Topic: Regarding an MMC for a QCWDRSSTC  (Read 1170 times)

Offline TDAF

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Regarding an MMC for a QCWDRSSTC
« on: February 19, 2018, 08:11:58 AM »
Now, I've sen a lot of people here use small PP capacitors for their MMC
my question is will thesehttps://www.ebay.com/itm/10PCS-CBB22-Through-Hole-Polypropylene-Film-Capacitors-1uF-400V/182362515272?hash=item2a75a72748:g:wsgAAOSwal5YNFZr
kind of caps work??
they're really cheap where i live

Offline Hydron

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Re: Regarding an MMC for a QCWDRSSTC
« Reply #1 on: February 19, 2018, 09:42:42 AM »
I would suggest finding something with a datasheet!

MMC capacitors for a QCW should not be very expensive - it's probably worth using something with known specifications unless you're on an extreme budget.

Offline TDAF

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Re: Regarding an MMC for a QCWDRSSTC
« Reply #2 on: February 19, 2018, 10:53:11 AM »
The mere act of having a datasheet makes a capacitor morbidly expensive in my opinion

Offline Mads Barnkob

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Re: Regarding an MMC for a QCWDRSSTC
« Reply #3 on: February 19, 2018, 11:09:47 AM »
They are properly very similar to the Panasonic ECWH capacitors that was used back in the old days, I got 3 kinds in my MMC calculator list http://kaizerpowerelectronics.dk/calculators/mmc-calculator/ and there is also a datasheet in the table of good MMC capacitors: http://kaizerpowerelectronics.dk/theory/good-mmc-capacitors/
http://www.kaizerpowerelectronics.dk - Tesla coils, high voltage, pulse power, audio and general electronics

Offline TDAF

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Re: Regarding an MMC for a QCWDRSSTC
« Reply #4 on: February 19, 2018, 01:32:51 PM »
hmm...
These capacitors might just work!!
Thanks a lot for all your help!!!
I plan on using 20 in series and 10 of these in parallel to give me about 50nF of capacitance

Offline Hydron

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Re: Regarding an MMC for a QCWDRSSTC
« Reply #5 on: February 19, 2018, 01:36:27 PM »
50nF is very large for a QCW coil - the required MMC normally works out to be under 20nF.

Offline TDAF

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Re: Regarding an MMC for a QCWDRSSTC
« Reply #6 on: February 19, 2018, 02:52:00 PM »
so,how much tank impedance should i be shooting for??

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Re: Regarding an MMC for a QCWDRSSTC
« Reply #6 on: February 19, 2018, 02:52:00 PM »

 


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