RE: [TCML] Grounding rods

[Jeremy Chan <jeremy_runescape@xxxxxxxxxxx>]

'groundness' is apparently measured in Ohms, according to my neighbour who served as an engineer in the armed forces. he was observing me and my first ever recently constructed coil. according to him a good ground should have an impedance of less than 15 Ohms, though i'm not exactly sure how it is measured. from my past experience of brine vs copper, extensive corrosion occurs rapidly, so although initial results of a brine-copper earth may be good, i would tend to think that performance would deteriorate rapidly due to corrosion, though i do not personally have much experience in that area. also, it may be the case that corrosion occurs much more rapidly where i am, as i live in Singapore, 2 degrees north of the equator.
Regards,jeremySingapore

> From: Gary.Lau@xxxxxx
> To: tesla@xxxxxxxxxx
> Date: Fri, 24 Jul 2009 18:24:46 +0000
> Subject: RE: [TCML] Grounding rods
> CC: 
> 
> The short answer is, no, I haven't tried using a chemical ground.
> 
> The problem is, I'm unaware of any means to gauge the "goodness" of a ground system.  The truth is, the spark performance of a Tesla coil is relatively (maybe completely) unaffected by the quality of an RF ground system.  What IS affected is the degree to which RF and HV transients are coupled into one's mains wiring, but again, I'm unaware of any means to measure or compare mains corruption.
> 
> If you can detect a performance difference with different grounds in receiving VLF radio, you may be able to teach us something!
> 
> Regards, Gary Lau
> MA, USA
> 
> > -----Original Message-----
> > From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> > Behalf Of Mike Thompson
> > Sent: Friday, July 24, 2009 2:03 PM
> > To: Tesla Coil Mailing List
> > Subject: [TCML] Grounding rods
> > 
> > Hello All,
> > 
> >   I was wondering if anyone had played with a chemicle ground in the past. This is
> > basically a copper pipe with holes drilled in it and then hammered into the ground.
> > At that point brine solution is poured into the pipe to "activate" it. I have played with
> > these in the past regarding ground antennas and have had decent success and
> > was wondering if anyone had use one for a Tesla Coil ground.
> > 
> >   I am currently keep a small blog on my progress with building a Tesla Coil if
> > anyone is interested in seeing the ground rod I am proposing to use.
> > 
> > http://z0rb.livejournal.com/tag/teslacoil
> > 
> > Thanks
> > Mike T.
> > 
> > Homepage
> > http://home.comcast.net/~mikethompson236/index.htm
> 
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