Re: ASRG & DC power oddity

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

Original poster: "G by way of Terry Fritz <twftesla-at-qwest-dot-net>" <bog-at-cinci.rr-dot-com>

Hi Weazle,

I am using a similar motor to turn an 8" plywood rotor with 5 
electrodes. I do not believe motor power is the problem. The motor is 
beating because it is slightly out of sync with the 60 hz mains freq. 
When the frequencies match up periodically, the doubler voltage will 
be peaking as the electrodes align. This situation will result in a 
stronger arc at that moment. I do not have this problem as I am 
running a much higher bps to keep bang size smaller.

best luck,
Gregory

>Hello Coilers,
>
>The milder weather we're having has let me carry on with some of my
>experiments with an ASRG and the DC power supply I'm developing and
>I've noticed an oddity.
>
>I'm using a 3450 RPM, 1/12 HP motor to turn a 6 inch teflon disk in
>which there are two flying electrodes passing thru the disk, spaced
>180 degrees apart.  The two fixed electrodes are on either side of
>the disk, meaning I get an alignment twice each revolution, or 120
>breaks per second.
>
>I notice that the motor has what I would term a beat note to it when
>running, the beat occuring roughly at one second intervals, sounding
>much like a twin-engined propeller driven aircraft when the engines
>are out of sync.  The spark when firing seems to follow this beat as
>well, and you can actually see the intensity of the arc varying with
>the beat note from the motor.
>
>The power supply is a twin MOT with the classic half wave doubler to
>give me about 11 KV unloaded.  I'm feeding the output of the doubler
>to the ASRG through two charging chokes (MOT secondaries) of 8.5 mH.
>The doubler cap is 1 uF., and the tank cap is 0.011 uF., yielding the
>recommended ratio as others have found.  I'm using my testing primary
>which in combination with the tank cap is resonant at about 430 kHz.
>and there is no secondary in the test setup.
>
>Can anyone on the list shed any light on this "beat note" behavior?
>Is it possible that my motor is under-powered to turn even a modest
>sized disk like I'm using?  Any suggestions are most welcome.
>
>73, Weazle, VE3EAR/VE3WZL
>
>Listening: 147.030+ and 442.075+
>E-mail:    weazle-at-hurontel.on.ca
>            or ve3ear-at-rac.ca
>Web site:  http://www.hurontel.on.ca/~weazle