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30 BPS, 60 BPS tests
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From: Malcolm Watts [SMTP:MALCOLM-at-directorate.wnp.ac.nz]
Sent: Thursday, March 19, 1998 4:16 PM
To: Tesla List
Subject: Re: 30 BPS, 60 BPS tests
Hi John, all,
> From: John H. Couture [SMTP:couturejh-at-worldnet.att-dot-net]
> Sent: Wednesday, March 18, 1998 10:19 PM
> To: Tesla List
> Subject: Re: 30 BPS, 60 BPS tests
>
<snip>
> -----------------------------------------------
>
> Malcolm -
>
> Tesla said there was a negative charge at the secondary terminal of an
> operating Tesla coil. Richard Hull said he measured a positive charge. This
> is contrary to what Tesla said. It is also contrary to what I found in two
> types of test.
I saw a clear positive DC bias in the output of the mag when I
conducted single shot tests on it recently. I was running it from a
DC charger so given that the system will consistently peak on one
particular half cycle due to the k it was set at..... I will have a
close look at the photos when I get them back to see which it was.
The terminal cannot sustain a charge between gap firings. The RC time
constant simply won't allow it. I think Bert Hickman covered that
quite succinctly.
> I said the secondary circuit because this is an RCL circuit and not just a
> terminal connected to ground. What is the effect of an RF unsymmetrical
> dampened wave in an RCL circuit and operating like a Tesla coil? The charge
> can be and has been measured by several coilers.
For AC firing, the terminal would peak with a polarity dependent upon
the primary cap charge polarity. There may be an output bias
regardless due to point emission, field emission etc. That could be
due to emission from the probe itself also.
Malcolm