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Re: Scopes Away! - mosfet
Tesla List wrote:
>
> >From richard.quick-at-slug-dot-orgThu Sep 12 20:35:58 1996
> Date: Thu, 12 Sep 1996 06:32:00 GMT
> From: Richard Quick <richard.quick-at-slug-dot-org>
> To: tesla-at-poodle.pupman-dot-com
> Subject: Re: Scopes Away! - mosfet
>
> Quoting Malcolm Watts <MALCOLM-at-directorate.wnp.ac.nz>:
>
> > I consider the gap to be the worst possible part of any coil
> > system (bar 7000 turn secondaries of #40 wire :) I expect to
> > show that anyone who makes a primary with Q>>10 in a real
> > system is going to blow established records and rules-of-thumb
> > out of the water. Thanks, Malcolm
>
> Malcolm;
>
> If you can show me the wiring diagram I will built and test it!
> Yes, as we know, the gap is the Q killer. But there is no other
> ~cheap-easy~ way to switch spark gap type energies in a circuit.
>
> Richard Quick
>
> ... If all else fails... Throw another megavolt across it!
> ___ Blue Wave/QWK v2.12
I gotta' chime here, too. The mosfet would be the ideal switch if it
could just handle 22,000 volts and 600 amps of current at the same time,
the way the spark gap has since 1880! I love the fact that low voltage
FETS are gettin down to .01 ohm Rds. IGBT's are looking real good too,
but 2500 volts is max and you can't get 'em! I am dinkin' around with H2
Thyratrons in an effort to work with variable dwells that give a large
range of adjustments. When all the smoke clears and theoretical stuff is
pushed asside, when the wishes, hopes, and dreams for the future are
relegated to that future, FETs, IGBTs and all the other stuff of this
century is pretty pathetic when it comes to big power at high voltages.
The voilence contained a flaming air arc is still the best, low cost,
power switch on the planet over 2500 volts and 600 amps.
Richard Hull