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#2
11-10-2019, 11:39 AM
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#7
11-11-2019, 09:30 AM
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Using a trippler with a non-trippler fly like that will either short the trippler (they will sometimes straight rectify their input when they short and could feign normal opperation while loading the fly to death in such an application as a home brew power supply), or require you to drive the flyback much less than normal and possibly have lower current output. If you want more than 1mA it really would be better to get a modern or even used neon sign transformer (last ARCI swapmeet I got a used one for $1) or something similar. Also it can be hard for us TV collectors to find the flys we need...It would be better for future maintenance of your supply and for the collector community if you considered something else...
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Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 Last edited by Electronic M; 11-11-2019 at 12:00 PM. Reason: add something
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#8
11-11-2019, 11:18 AM
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I agree with what Electronic M said.
Tripplers contain capacitors and diodes. The diodes and capacitors have a maximum voltage they can withstand. Diodes also have a limit on the maximum current they can handle. The capacitors have to charge through the diodes and the charging current depends on the size of the capacitors as well as internal resistances in the devices. The bigger the capacitors the more current the trippler can output but also the charging current is higher. Flybacks can only output so much current, I doubt even a color flyback could stand more than 1.5 ma without burning out. You can't reliably predict how much voltage and power a flyback can handle by the size of the secondary winding. The cross section area of the core also limits the power. Even the frequency the transformer is operating at effects the output, the secondary is actually operating at much higher frequency than the 15,750 Hz horizontal because it is a narrow pulse. The flyback circuit is something that evolved over time for one purpose and the design is complex. Neon sign transformers are simpler as is another device called a oil burner ignition transformer (those are probably harder to find). Still another idea is an old automotive ignition coil and transistor drive circuit. You could build you own trippler circuit using parts that you know the specifications on with the alternate transformers. Do be VERY careful with these HV supplies, they can be lethal.
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#10
11-10-2019, 09:10 PM
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When you say the unit 'burned out', did it physically smoke? If not, how did you determine it's the fly that's bad and not some other component? Open winding? If no open winding, did you test it on a ringer?
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