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Re: [TCML] RF Ground and Brass
In a message dated 3/5/08 9:55:23 A.M. Eastern Standard Time,
>I'm curious how you came to noting several Amps of secondary base current.
On what size/power
>coil? Are you talking about peak or RMS Amps?
In Dan McCauley's "DRSSTC II" book, he shows simulation predictions of
secondary base current of ~8A peak, and measured of ~5A peak. These are of
sinusoids in 300uS square-ish pulse envelopes at 100 bursts per second. I can't do
the math on that one, but it seems to me that it works out to "a lot less than
1 amp RMS continuous". This on a 1kW coil.
>On my 15/60-powered coil, I once placed a small flashlight bulb in line
with the secondary base, and
>I think it only registered a modest glow (though my recollection is also
That's an interesting test!
> I recall that Terry Fritz
>(in a post dated 7-21-2000) had measured his base current, also with a
15/60 NST, as 350mA RMS.
If we were passing 10A RMS through our secondary bases, the typical 6"
coil wound with ~ 25ga wire would probably self-destruct very quickly!
It *does* seem a bit silly to splice a piece of 10ga THHN to a the
bottom of two thousand feet of 25ga like it's going to make a difference!
If nothing else, 10ga is much more visible in the dark and therefore
less likely to be tripped over, with disastrous results...
Center for the Advanced Study of Ballistic Improbabilities
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