Subject: RE: UPDATE
From: richard.quick-at-slug-dot-org (Richard Quick)
Date: Thu, 11 May 1995 04:10:00 GMT
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* Original msg to: Lisanap-at-cats.ucsc.edu
Quoting Mark Napier:
MN> Sorry about the chopped message. Your answers are what I
MN> was looking for, though.
Glad I could help!
MN> I want to get a ground set up so that I can start running
MN> the tank and set up some vibration in the cap so that it
MN> will bubble out some. I'm trying to stick with the gradual
MN> "break-in" described in your archive.
Tried and true. I am not posting to steer people wrong.
MN> More questions about grounds:
MN> How much ground do you need for 1KVA? 2KVA?
OK, you are one of the people who are finally nailing me. Figure
roughly about 500 watts of input power (~.5 kVA) per 8 foot long
copper ground rod.
MN> Is there a correlation between the amount of power and the
MN> surface area in the ground?
MN> If so, then 1" pipe is better than 1/2" rod?
Depends on the soil, and the soil moisture content.
MN> I understand that there are variances due to moisture and
MN> soil, but I am wondering how many rods I have to drive for
MN> this particular coil. I will probably be moving within a few
MN> months, but I don't want to wait to fire this up.
You don't want to go through the trouble of building an inter-
ference free ground if you are only going to be using it
intermittently for a few months, especially at low power. Make
sure your immediate 60 cycle power ground is NOT connected to the
water pipe by using a VOM, then use the water pipe for low power
testing and tuning.
At power levels below 1 kVA, for short duration intermittent use,
I see no reason to sink $$$ or effort into a heavy ground system.
... If all else fails... Throw another megavolt across it!
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