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Peak cap voltage, was 12kV, 30ma TC specs, 42" spark




From: 	FutureT-at-aol-dot-com[SMTP:FutureT-at-aol-dot-com]
Sent: 	Tuesday, September 23, 1997 5:12 AM
To: 	tesla-at-pupman-dot-com
Subject: 	Re: Peak cap voltage, was 12kV, 30ma TC specs, 42" spark

In a message dated 97-09-22 22:39:24 EDT, you write:

<<  I ran an async rotary (BPS at least 4x 
> Fmains) with a static gap planted firmly across it to catch misfires.
> First point of note was that the coil never emitted sparks until the 
> variac was turned well up. 

Hi Malcolm,

Sounds like the rotary gap spacing was too wide, or the electrodes 
happened to present at the wrong times.

>Second was that while I got a pleasing 
> tone, I always obtained the single waving streamer from the sphere 
> with virtually no variation and the ionization was severely clamping 
> the output.

This effect may be related to a high break-rate, and lower voltages?

> If I'd known the transformer was going to fail later that 
> day, I would have let the coil discharge to a ground under these 
> conditions to see exactly what sort of attached discharge it would 
> produce.

> It seems clear from my failure that it pays to adjust k carefully 
> before letting it totally rip or risk leaving a significant amount of 
> energy in the system to impinge itself on the transformer. No simple 
> answer here. If the gap quenches well and the secondary can't unload 
> fast, major problem. 

I agree, my secondary resonator unloads pretty quickly, maybe within
little more than one beat envelope of time.

> I now wonder whether Dr Resonance's observation 
> that low frequency systems seem to cause less kickback is related to
> streamer formation speed.

I was unaware of this observation by Dr Resonance...most intriquing.

Yah, plenty o' questions for sure,
John Freau

> ?? Heaps o' questions,
> Malcolm
  >>