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Re: How do I get a good RF Ground? (and: Hello Again!)
From: Malcolm Watts[SMTP:MALCOLM-at-directorate.wnp.ac.nz]
Sent: Monday, October 27, 1997 3:42 PM
To: Tesla List
Subject: Re: How do I get a good RF Ground? (and: Hello Again!)
Hi Adam,
> From: Adam[SMTP:absmith-at-tiac-dot-net]
> Sent: Saturday, October 25, 1997 8:50 PM
> To: tesla list
> Subject: How do I get a good RF Ground? (and: Hello Again!)
>
>
> Hi again folks, I've been off the usa-tesla list since I finished my last
> coil back in summer '95, and it seems dead now, so I've joined this one.
> :-)
>
> My question for today is:
>
> I have a medium size coil that I wish to take around with me for
> demonstrations. By medium-sized I mean it is a 4.5" dia by 24" coil
> firing off 2 foot sparks with input from a 12kV/60mA neon. Outdoors, I
> have just been running a short piece braid from the coil to a 4 foot
> piece of copper tubing I hammer into the ground, but I really don't know
> anything about RF earth grounding or about what I am doing. I'm an EE,
> and I know the all basics, but when it comes to specifics I am an Audio
> and DSP guy; much more of a mathematician and programmer than power
> engineer.
>
> What I need is a solution for grounding indoors, especially one that will
> prevent damage to equipment that may be on the same power line, spoken
> from experience. Are powerline filtering chokes a big help?
>
> -Adam
I'd get rid of any braid in the system. It is a total loser at RF. In
fact I have yet to measure anything worse. I always use line filters.
Malcolm