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Forums
4hv.org :: Forums :: Tesla Coils
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Help for MOT SGTC

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twist2b
Fri Nov 22 2013, 05:03AM
twist2b Registered Member #2086 Joined: Tue Apr 21 2009, 02:33AM
Location:
Posts: 117
redruM69! I had seen your work before browsing youtube I didn't know you were on 4hv haha. that is an awesome system you got there. Did it cost you a lot?
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redruM69
Fri Nov 22 2013, 06:34AM
redruM69 Registered Member #31557 Joined: Tue Aug 06 2013, 02:38AM
Location:
Posts: 58
twist2b wrote ...

redruM69! I had seen your work before browsing youtube I didn't know you were on 4hv haha. that is an awesome system you got there. Did it cost you a lot?

Thanks!
The spun aluminum toroids, and the 942c caps were the expensive bits. The rest is trivial stuff. A lot was just junk that I collected over time.
On Halloween I had it on display outdoors. Streamers occasionally peaked around 6ft! Not bad for a 5.25" coil!
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Dr. Dark Current
Fri Nov 22 2013, 09:47AM
Dr. Dark Current Registered Member #152 Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Has anyone mentioned the charging inductor, which is required in a DC-powered SGTC?
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Patric
Sun Nov 24 2013, 07:22PM
Patric Registered Member #2899 Joined: Wed Jun 02 2010, 06:31PM
Location: Deinze, Belgium
Posts: 254
Patric wrote ...

Thank you very much, it is all clear now for me! The capacitor is the only thing that bothers me. What value is optimal? I think 10 to 20nF is enough for me. I have several choices:
http://www.ebay.com/itm/200844654385
http://www.ebay.com/itm/190931420792
http://www.ebay.com/itm/190855218801
http://www.ebay.com/itm/200963004770
Can you please help me once more? I will use two MOT's with AC.
Please can someone give an opinion about those capacitors? I'll be very grateful!
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redruM69
Mon Nov 25 2013, 06:15AM
redruM69 Registered Member #31557 Joined: Tue Aug 06 2013, 02:38AM
Location:
Posts: 58
Patric wrote ...

Thank you very much, it is all clear now for me! The capacitor is the only thing that bothers me. What value is optimal? I think 10 to 20nF is enough for me. I have several choices:
http://www.ebay.com/itm/200844654385
http://www.ebay.com/itm/190931420792
http://www.ebay.com/itm/190855218801
http://www.ebay.com/itm/200963004770
Can you please help me once more? I will use two MOT's with AC.

The first one, no idea. As for the other 3, I've messed with doorknobs in the past. The old surplus ones are hit or miss, most often miss. They aren't pulse rated and usually dont work. If you are going to use doorknobs, try to find TDK or Murata pulse rated ones. I've had some success with those in the past.
Have you considered building an MMC with 942c series caps?
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Patric
Mon Nov 25 2013, 06:41PM
Patric Registered Member #2899 Joined: Wed Jun 02 2010, 06:31PM
Location: Deinze, Belgium
Posts: 254
Caps are so (...) expensive! But thank you! smile
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