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Re: hvguy-dot-com new flyback driver
Original poster: "Area31 Research Facility by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rwstephens-at-hurontario-dot-net>
Matt and others,
I have a few large doughnut N.O.S. 60's color TV flybacks (FLY-445) for direct
25 kVDC without a tripler in a vacuum tube set as you describe encased in
silicone, not the crappy earlier wax jobs, for sale for $30 US each which
includes P&H to Canada or Continental US. Contact me off list if interested.
> ----- Original Message -----
> From: <mailto:tesla-at-pupman-dot-com>Tesla list
> To: <mailto:tesla-at-pupman-dot-com>tesla-at-pupman-dot-com
> Sent: Thursday, May 02, 2002 22:17
> Subject: Re: hvguy-dot-com new flyback driver
> Original poster: "by way of Terry Fritz
> In a message dated 5/1/02 8:25:19 PM Eastern Daylight Time,
> << When I was a kid, I perfected a flyback circuit that worked with a single
> 2N3055. The key was putting an inductor (couple of mH?) directly from base
> to emitter to suck the charge out of the base during turn off. I used 20
> turns of secondary on the bottom rung of the flyback, and 2 turns of
> tickler coil connected via a cap to the base. This was an oscillator. You
> start the oscillation by hitting a button which spikes the base line, then
> its free running. I used to be able to flash over and incinerate the
> biggest flybacks from the 70's, with about 30V Vcc. This circuit was very
> efficient since the L-C high pass character of the tickler circuit pulsed
> the transistor with a very short width. Rob.
> ps. I'd love to build one of these again, but those old flybacks are
> no-where to be found except in landfills
> Hmmm, sounds interesting.So an inductor would help out?What about using an
> inductor with a mosfet?
> Isnt it sad that those NICE flybacks are all under dirt?I REALLY wish I had
> more. I have an ok one but it has many secondary outputs although its a good
> 3in diam by 1in disk.Maybe we ought to "mine" these landfills?LOL im
> kidding!Any ideas where to get these?Surely they are stockpiled somewhere.