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Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
Last year in May I bought one of these a fun little module. I gave the secondary a dip in polyurethane varnish, I don't know if it helped.
The airgaps are easily adjustable by using different thicknesses of shims (paper, plastic etc.)
As supplied the kit makes 5mm arcs easily but gets too hot for my liking within about 10 seconds of continuous use. For longer run time decrease the thickness of the shims/airgaps. (this kit uses a one transistor blocking oscillator so core heating is roughly proportional to frequency and smaller airgaps give lower frequencies)
The primary was easy to unwind and re-wind with a primary of my choice.
I think that this is an excellent bit of kit for anyone starting in high voltage experimentation.
im wanting to recalculate a primary for 1500 guass. but i got to go to work. i had all this figured out for my planar and UU cores, but need to look at my notes and maybe find the threads here on the forum.
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
ok im attempting to rewind them as a "flyback" type (conventional topology, not TV kind) with a diode+reset winding and no core gap. im not sure waht the volt/amps are for 1500 guass given the above info.
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Chinese Small 15kV Transformers and the Oscillograms that will Follow.
