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Registered Member #79
Joined: Thu Feb 09 2006, 11:35AM
Location: Arkansas
Posts: 673
Hey guys, I've had great results just paralleling primaries on the same ZVS driver. I've done up to three in parallel with great success, then depending on what you want, you can series the flyback output for high voltage or parallel for more current. I went up to about 100kV, it was pretty scary.
Registered Member #241
Joined: Thu Feb 23 2006, 09:13PM
Location:
Posts: 19
Part Scavenger wrote ...
Hey guys, I've had great results just paralleling primaries on the same ZVS driver. I've done up to three in parallel with great success, then depending on what you want, you can series the flyback output for high voltage or parallel for more current. I went up to about 100kV, it was pretty scary.
wow that sounds nice so.. i start gathering a LOT of flybacks and driver parts Do you think its better spark show at series or paralleling the flyback outputs? or maybe i can like go for series and parallel
Registered Member #79
Joined: Thu Feb 09 2006, 11:35AM
Location: Arkansas
Posts: 673
Nope, it's a lot more fun to series them. Just be careful and just use a long chicken stick (no more screwdrivers). I wouldn't worry about parallel unless you're trying to drive a tesla coil or something, the spark is plenty hot enough for a good show. (at least mine was). I was using IRF540 MOSFETs for the ZVS driver. They died after a while when driving three in series, but I was seriously overdriving them.
Oh, yeah, I was using an oversized (like 1uF) cap and 25V input, with a large filter cap across the input if that helps anyone. Sorry, I didn't measure wattage, but the arc would initiate at about 80-100kV and then the arc looked like it was doing some 30mA or so. I know I wasn't pulling 3kW though, so I assume the output voltage dropped considerably as soon as the arc initiated. Anyway, good way to kill an afternoon.
Registered Member #78
Joined: Thu Feb 09 2006, 11:27AM
Location: Sydney, Australia
Posts: 133
Part Scavenger wrote ...
Hey guys, I've had great results just paralleling primaries on the same ZVS driver. I've done up to three in parallel with great success, then depending on what you want, you can series the flyback output for high voltage or parallel for more current. I went up to about 100kV, it was pretty scary.
Is this with 3 similar ones? Also, these didn't have the internal multipliers did they?
Registered Member #241
Joined: Thu Feb 23 2006, 09:13PM
Location:
Posts: 19
Hmm i am definately going to try these flybacks in series. About internal multipliers and stuff.. if you cant use flybacks from new model TVs (that is what was mentioned on the web site that gave me info about flybacks) then what model or what production date TVs should i look for.. Pls help me on this one because all the flybacks i can get hold of are new models and i am searching for a black&white TV now
Registered Member #95
Joined: Thu Feb 09 2006, 04:57PM
Location: Norway
Posts: 1308
Multiplier flybacks work fine, its just that the older AC flybakcs are often prefered. The old AC ones give better spark length and arcs so I've heard. I've had good results from a monitor flyback + ZVS driver + just 12volts, so use what you can find.
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Double flyback driver??
Do you think its better spark show at series or paralleling the flyback outputs? or maybe i can like go for series and parallel 
