Re: 10kV here and 10kV there ...

On 4 Feb 2007 15:54:39 -0800, Winfield Hill
<Winfield_member@xxxxxxxxxxx> wrote:

I'm trying to finish the fab drawings for an instrument that seems
to have a little too much high voltage. Each part looks OK, but
there's that nagging feeling... Can't seem to shake it.

10kV here and 10kV there, and pretty soon you're talking real
voltage. -3kV for the Channeltron. -10kV max for one electrode,
-10.1kV plus a HV ramp for the other electrode.

+15kV for the voltage source powering the MOSFET stack for the
HV ramp. You may remember my 10kV 1us-long highly-linear ramp.

Actually I ended up with a 12 to 13kV ramp, which can last 0.5us
to 100us, but the first 10kV is very linear. AC-coupled, the HV
ramp takes the -10.1kV electrode down to -23kV. Let's see, we
have +15kV dc and -10kV dc, that's a 25kV AC coupling cap. OK.

Hmm, +15kV and -23kV, that's 38kV. In a 3.5" 2U chassis.
No wonder I'm nervous. Keep things far apart I guess.

Not much worse than an old color TV. I have an old Bertam 30 KV power
supply about that size, all air insulated, ancient and dusty, works
fine.

Got any pix? Schematics? Did you lose many fets getting the stacked
ramp thing to work?

Some sort of streak tubish spectrometer thing?

John

.

Relevant Pages

  • Re: 10kV here and 10kV there ...
    ... to have a little too much high voltage. ... -10.1kV plus a HV ramp for the other electrode. ... The differential to the chassis node will only be one of those two ...
    (sci.electronics.design)
  • Re: TZ Ground Short Issue
    ... and you determine which voltage rail it's shorted to. ... looking for a short somewhere around that ramp. ... removed the game from power. ...  If somehow coil power was shorted to that I ...
    (rec.games.pinball)
  • Re: TZ Ground Short Issue
    ... What this is that you measure voltage ... ground to your ramp that has the volts you are measuring. ... crappy DMM that I use for basic work and I have a nicer Craftsman DMM ... that this issue is with the diverter coil. ...
    (rec.games.pinball)
  • Re: 10kV here and 10kV there ...
    ... to have a little too much high voltage. ... Can't seem to shake it. ... -10.1kV plus a HV ramp for the other electrode. ...
    (sci.electronics.design)
  • Re: 10kV here and 10kV there ...
    ... to have a little too much high voltage. ... Can't seem to shake it. ... -10.1kV plus a HV ramp for the other electrode. ...
    (sci.electronics.design)
Quantcast