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| |-+  High Voltage Stuff (Moderator: Hero999)
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Author Topic: Flyback Help  (Read 1837 times)
HVmaster221
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« on: February 07, 2012, 08:58:51 PM »

Hi. I'm new to the forums. I was experimenting with a color TV flyback, using a 2N3055 driver (I DO NOT want to kill myself with a ZVS) and i was getting an arc to ground with a spark gap I built, and then out of nowhere; my flyback stopped working. I was using a 10 volt 750 mA power supply. I checked the power supply with my multi-meter and it still read 10 volts and 750mA. I checked my transistor by using a different circuit and the transistor was fine. None of my resistors blew, but I did find one thing: my flyback was giving out .9 volts on the secondary! I'm thinking that I might have to buy a new flyback. If anybody knows where to get a cheap flyback online for about 6 US dollars, it would be great.
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Hero999
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« Reply #1 on: February 08, 2012, 01:14:12 PM »

It sounds like the secondary voltage on the flyback exceeded its maximum rating causing the insulation to fail, arc over and internally short circuit. The only fix is a new flyback.

To prevent this from happening again do the following: add more turns to the primary or reduce the power supply voltage and never operate the flayback open circuit.
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I do not answer private messages asking for help because no one else can: benefit from advice I may give or correct me if I'm wrong.

Please ask on the open forum if you have a question: if I know the answer, I'll be happy to help.

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