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Registered Member #3637
Joined: Fri Jan 21 2011, 11:07PM
Location: Buffalo, NY
Posts: 1068
Is there any safe or easy way of shorting out or taking out the HV diode from an epoxied DC flyback transformer? I'd like it to be pure AC, but don't have a way of getting an AC flyback. I've seen some people with shorted diodes but from the way it sounds, if the diode goes, so does the flyback. Any suggestions?
Registered Member #3414
Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
You can connect a big capacitor to it and blow the diode, but the coils don't seem to last long afterwards, you can take a grinder to it and short out the diode by soldering, but, again, the coils don't seem to last long, or....wind your own secondary.
Registered Member #3610
Joined: Thu Jan 13 2011, 03:29AM
Location: Seattle, WA
Posts: 506
Some flybacks have multiple diodes spread out between sections of windings. AC flybacks are not hard to come by though, they're on ebay frequently. As Ash suggested, you can also wind your own secondary on a salvaged core. It's not as hard as it sounds.
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
They fail so quickly because the diode(s) split the voltage from several seriesed' coils, which reduces the insulation requirements. If you get rid of the diodes the V eats the wire enamel and you have a failure mode of one kind or another.
My advice, buy an old but known good AC flyback, or wind your own, you'll be happier.
Registered Member #2063
Joined: Sat Apr 04 2009, 03:16PM
Location: Toronto
Posts: 352
you'll get ALOT more current if you coil your own secondary. and its AC too :D u can use it for a voltage multiplier, plasma globe and lots of fun stuff but its quite hard to get the voltage as high as a normal flyback though.
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Some way to "take out" the hv diode in a flyback?
