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4hv.org :: Forums :: Tesla Coils
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MOT Doubler with SGTC

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MRacerxdl
Thu Jul 31 2008, 01:21AM Print
MRacerxdl Registered Member #989 Joined: Sat Sept 08 2007, 02:15AM
Location: São Paulo, Brazil
Posts: 476
Hi, I am going back to my SGTC project until I didnt get a scope.
Yesterday I tested my MOT Doubler PS at the Tesla Coil, but I didnt have a good result.
I was working for 1s and stoped, when stoped I noticed an arc like mot arc in my SparkGap, like it be if the cap-bank wasnt there.
But if I unplug and plug again from the mains it start to work, and stop again.

I tryed one thing, reduce the C1 and C2 caps to 33nF each. It worked, but at low power (250W).
Someone knows what is the problem of my setup?

Here my schematic:
Link2

Thanks!
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Coronafix
Thu Jul 31 2008, 01:51AM
Coronafix Registered Member #160 Joined: Mon Feb 13 2006, 02:07AM
Location: Melbourne, Australia
Posts: 938
I would replace the L1 & L2 with power resistors because you are creating a resonant circuit with the 20uF caps.
What is the NST secondary for?
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MRacerxdl
Thu Jul 31 2008, 01:52AM
MRacerxdl Registered Member #989 Joined: Sat Sept 08 2007, 02:15AM
Location: São Paulo, Brazil
Posts: 476
the L1 and L2 are only for filter. The charge choke is the NST secondary wink
Here are some arcs that I can get with DC Out:
Link2
Link2
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Cain
Thu Jul 31 2008, 01:09PM
Cain Registered Member #624 Joined: Tue Apr 03 2007, 07:50AM
Location:
Posts: 59
if you sre going for a dc resonate coil you will need a better choke and a "de-Qing" diode before the choke
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MRacerxdl
Thu Jul 31 2008, 04:44PM
MRacerxdl Registered Member #989 Joined: Sat Sept 08 2007, 02:15AM
Location: São Paulo, Brazil
Posts: 476
Better choke? How much Inductance? More than 150H?
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