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4hv.org :: Forums :: Tesla Coils
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Mini Coil rebuild problems.

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Ken M.
Wed Feb 27 2008, 10:57PM
Ken M. Registered Member #618 Joined: Sat Mar 31 2007, 04:15AM
Location: Us-Great Lakes
Posts: 628
Yep Uzzors, it was the feedback, I thought the 7414's pins were setup a certain way, then when i tested the pins it turns out that I had messed up, Connected 2 outputs together and and was trying to pull an output from an input, Fixed it and it ran fine....until I put the topload on and then the fets blew up again, but this time I think it was overheating, since the heatsinks were crazy hot. TCguy first try running it and see if you can't draw a small arc, if you can its your feedback circuit.
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teslacoolguy
Sat Mar 01 2008, 05:09PM
teslacoolguy Registered Member #1107 Joined: Thu Nov 08 2007, 10:09PM
Location:
Posts: 792
no i cant draw any arc at all so that still leaves me up in the air about it.
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Ken M.
Sat Mar 01 2008, 06:06PM
Ken M. Registered Member #618 Joined: Sat Mar 31 2007, 04:15AM
Location: Us-Great Lakes
Posts: 628
Switch the primary wires around the ntry to draw an arc, if that doesn't work then try and switching the feedback wires if your using a CT. If still nothing then I don't know ATM.
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teslacoolguy
Sat Mar 01 2008, 08:43PM
teslacoolguy Registered Member #1107 Joined: Thu Nov 08 2007, 10:09PM
Location:
Posts: 792
i tested the waveform on the secondarys of the gdt and now i am getting a 60hz interfierence in the signal. last time i tested them i wasent getting that so i have no clue were that came from.
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