From: John H. Couture [SMTP:couturejh-at-worldnet.att-dot-net]
Sent: Monday, January 26, 1998 6:43 PM
To: Tesla List
Subject: Re: Voltage/Length (fwd)
Refer to my post regarding magnifying power to Jim Monte re: "Magnify power
The volt amps are VA not RVA referred to in the secondary.
The Tuve et al pickup probe was calibrated in their laboratory using a
known voltage in an electric field but at lower voltage levels. The probe
sensed the electric field around the Tesla coil. Everything was in oil.
Some time ago I posted information on tests I recently made with neon
transformers. I made a graphs which showed that with certain
resistor/capacitor combinations the VA "out" was greater than the VA "in".
However, the watts "out" were less than the watts "in".
At 04:54 AM 1/25/98 +0000, you wrote:
>From: Edward V. Phillips [SMTP:ed-at-alumni.caltech.edu]
>Sent: Saturday, January 24, 1998 10:27 AM
>Subject: Re: Voltage/Length (fwd)
>" Jim -
> Tuve, et al did build and test a 5 MV TC in 1930. A drawing is shown in
>the Tesla Coil Construction Guide. Also shown are some calculations on how
>they determined the power gain.
> The Guide also shows a test method to measure the TC secondary voltage of
>a small TC using a remote pickup probe. I made some tests with this setup
>using a small TC but the results were inconclusive.
> John Couture"
> What do you mean by power gain in the above statement?????
>Reactive volt-ampers in the secondary can never exceed those in
>the primary, even for a system without losses.... (Make that volt-amperes).
> I can't see how a pickup probe could give reasonable answers
>unless there were no corona or streamers.