Re: Mot DC Ps

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Luc by way of Terry Fritz <twftesla-at-uswest-dot-net>" <ludev-at-videotron.ca>


Hi Deano

I'm not ready to try a charging choke, I think this approach need more test
and you probably need
some kind of snubbing circuit to protect the diode ? Concerning the
resistance I find a stock of
200 units 10 Kohm 25W  I could build a MMR ;-)) but the more I think about
it I probably try a
big water resistance ( check the Jim Lux web site ) I KNOW I KNOW : DC and
water will produce a
mixture of oxygen and hydrogen in big quantity , if you mix enough air with
the gas mixture and
pomp it to the exterior it will be safe. I plan to use a 4" pipe PVC 30"
high, the upper
electrode will be movable and use a small vacuum cleaner with the intake
near the water and the
output to the exterior .

Luc Benard


Tesla list wrote:

> Original poster: "David Dean by way of Terry Fritz <twftesla-at-uswest-dot-net>"
<deano-at-corridor-dot-net>
>
> Hi
>
> When I looked at this the first time around I must have not been paying
> close attention. I missed the connection between the two filter caps and the
> lower two diodes. This is the same rectifier circuit used in the off line
> rectifier in computer power supplies. When the connection is there, the
> circuit is a full wave doubler and the lower two diodes do nothing. The PIV
> rating of the diodes needs to be 2*1.4*VRMS. When the connection is not
> there, the circuit is a full wave bridge rectifier with a PIV requirement of
> 1.4*VRMS. However in the diagram it shows two microwave oven diodes in
> seriesed for each diode position, so you are covered there.
>
> I tried a full wave doubler made with one MOT last summer. (6.5KV filtered
> DC output) I first tried resistance between the PSU and the static gap, but
> it burned up real quick. You need to have a lot of wattage for resistors to
> work. Then I tried a charging choke made from the secondary and core of
> another MOT, stripping several layers from the inside and the outside of the
> winding to make room for insulation. It worked, but only a few seconds. I
> suspect the choke ringing killed the diodes. Perhaps a charging choke with a
> dampening resistor would work, and the filter can't hurt. (I didn't have one
> on mine)
>
> later
> deano
>