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Re: Varying HVDC PS
Original poster: "Chris Brick by way of Terry Fritz <twftesla-at-qwest-dot-net>" <cbrick-at-rebelbase-dot-com>
>Yes, the very same PS. The HVPS schematic shows how to make a driver that can
>vary the output HVDC with a potentiometer and the 5 vdc ps -- like you have
>I'm interested in driving the HVPS with a function generator (limited -at- 5
>vdc). This should create a variable HV output of many different types of wave
>forms. If the frequency response of the PS is good enough then maybe the SG
>can be eliminated and the TC primary tank directly driven. So, does anyone
>know the frequency response of these HVDC power supplies?
When we originally got these power supplies and tested the first one on my
little 4" coil, we hooked a signal generator up to the enable pin to vary
the on time. I don't recall the actual frequency that we were able to
pulse the pin at but it was relatively high. I'm sure we got it up past
120hz. The coil made some nice sounds as we varied the frequency. A
musical instrument of sorts. Have you pulled the cover off and looked at
the control electronics? You may be able to identify some of the parts and
figure out what the upper limit will be.
I have yet to let the smoke out of one of these and have four of them in
parallel running my large coil for 15+ foot arcs.