[NewCandle] Power pulse SCR

[Keith Nagel]

Yes, the puks are expensive; I bought mine from a fellow on
ebay some years back. He's not in business anymore
or I'd send you some contact information. Mine were very
cheap but a few were bad, you should test them before you
fire an active circuit. The way you do this is to arrange
a voltage source with a _large_ resistor in series with the
SCR. Use a multimeter to measure current thought the SCR at the most
sensitive setting. Starting from 0 volts, slowly raise the voltage towards
the
rated voltage of the SCR. You should see very little leakage
current, not more than a few micro amps. If the current
begins to rise, stop. Derate that voltage by about 10% and
that's the safe operating voltage of the SCR. It can be
quite a bit lower for an SCR that's been abused, and such
SCRs may also fail. A good SCR will test at least to the
rated voltage, usually somewhat more.

I read the patent text in more detail, and didn't really come
away with a clear idea about best parameters for driving the circuit.
Without values of R and L for the antenna it's hard for
me to suggest a cap to fit. I'd say for starters you could
go with the electrolytics caps you mentioned, fire with a single shot and
test
increasingly larger capacity caps. With a setup similar to
the NASA arrangement with a mirror and laser you should
be able to get useful information from a single shot.
If the experiment works, and you get propulsion, we
can go on to design a continuous pulsing device.

K.

-----Original Message-----
From: newcandle-bounces at ipdiscover.com
[mailto:newcandle-bounces at ipdiscover.com]On Behalf Of Kyle R. Mcallister
Sent: Saturday, October 04, 2008 11:20 AM
To: New energy for the new world.
Subject: Re: [NewCandle] Power pulse SCR


Keith Nagel wrote:
> Hi All,
>
> As promised, here's a page with one of my designs for a power pulse SCR.
>
> http://www.kpnconsulting.com/Research10.htm
>
> This design uses a transformer to isolate the power side from the signal
> side, a little more complicated than what I described but well worth
> the trouble to build.

Looks good. I'll start checking around, see where I can find a large puk
SCR. Expensive guys to buy new.

Did you get my message about the pulse width? What value of capacitor do
you think would be good to start with here?

--Kyle

_______________________________________________
NewCandle mailing list
NewCandle at ipdiscover.com
http://ipdiscover.com/mailman/listinfo/newcandle_ipdiscover.com