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Re: Cap Location (fwd)
---------- Forwarded message ----------
Date: Tue, 13 Jan 1998 00:51:43 +0000
From: "John H. Couture" <couturejh-at-worldnet.att-dot-net>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: Cap Location
At 05:27 AM 1/12/98 +0000, you wrote:
>
>From: Greg Leyh[SMTP:lod-at-pacbell-dot-net]
>Sent: Sunday, January 11, 1998 6:20 AM
>To: Tesla List
>Subject: Re: Cap Location
>
>>
>>
>> Tesla in the CSNotes said he thought the gap across the transformer was
>> better than the cap across the transformer as you and Mr. Cox suggest. He
>> based this on the fact that the current from the cap did not have to go thru
>> the gap to get to the TC primary winding.
>
>??? Did he say where the current _did_ go, if not thru the gap?
------------------------------------------
Tesla's sketch in the CSNotes (July 2, 1899) for the gap across the
transformer showed two capacitors, One was in parallel (Cp) with the TC
primary winding and the other (C1) was in series. Tesla said "The
oscillations are started by the operation of the break (gap) in the circuit
LpCp and continue much longer." There is less current thru the break and
more thru the primary when compared to the capacitor across the transformer
circuit. I have never tried this TC circuit so cannot comment on the results.
I agree that normal gap opening would not cause damaging voltage
transients but I believe it is possible on rare occations that the gap
opening could be at micro dt and at a time of large currents in the primary
winding. However, to prove this would require destructive testing, not
recommended. Nevertheless, something of this nature is happening as
evidenced by the multitude of burned out transformers and capacitors.
John Couture