Re: Grounding question...
The short term "peak" current is relatively high. This high current in a
few microsecond time span means the current has a high freq value which
requires a larger ground than normal. A ground with some resistance will
cause this peak current to become an electromagnetic wave, ie, radiation
which is not desireable. It steals from coil performance. Also, if the
ground doesn't look solid to the signal it will not see the bottom of the
coil at zero potential and could begin presenting phase shift problems.
A real good ground with a fine strand cable like welding cable is
desireable. For a small coil running on a NST usually 4-6 AWG will suffice.
From: Tesla List <tesla-at-pupman-dot-com>
To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
Date: Friday, February 25, 2000 9:41 PM
Subject: Grounding question...
>Original Poster: "Michael Novak" <Acmnovak-at-execpc-dot-com>
> Why exactly do we need such a large, low impedence ground connection?
>all, the wire from the secondary is quite small... What's going on here?
>I've heard of coilers using welding cable for ground connections for coils
>wound with 22 guage wire.