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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