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sparks for cheap
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From: John H. Couture [SMTP:couturejh-at-worldnet.att-dot-net]
Sent: Thursday, August 20, 1998 4:05 PM
To: Tesla List
Subject: Re: sparks for cheap
JohnF -
Do you have any comments on why the sparks were the same length for the 4
KVA and 6 KVA inputs?
I think you will find that this would not occur with controlled sparks.
John Couture
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At 11:18 PM 8/19/98 -0500, you wrote:
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>From: Gregory R. Hunter [SMTP:ghunter-at-enterprise-dot-net]
>Sent: Tuesday, August 18, 1998 5:13 PM
>To: 'Tesla List'
>Subject: RE: sparks for cheap
>
>John,
>
>Did you isolate the HV leads from the cores on your "outboard" xfmrs, or
run them "as is". I have an identical pair of 900w MOTs that generate
2250vac each. I'd like to wire up 4 of them for 9kv. On my xfmrs, one HV
lead is connected to the core, and the other ends at a ceramic insulated
spade terminal. I'm wondering if I should clip the HV lead loose from the
core of the "outboard" units and insulate them before wiring them in
series. Otherwise, the 2250vac output of the "inboard" units would be tied
directly to the cores of the "outboard" units--a very odd arrangement. Any
advice?
>
>Greg
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>Sleepy Hollow
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>Mike, all,
>
>In the past, I've wired 4 MOT's with secondaries in series and obtained
>64" sparks. Some corona-sparkling could be seen between the core
>and winding on the "outboard" MOT's however, but they held. The
>system used a non-sync rotary gap, and a .08uF cap. Without ballasting,
>the TC drew about 6kVA. With ballasting, this was cut back to about
>4kVA, spark lengths were the same in either case.
>
>John Freau
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