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Practical limits

Original poster: "Matt S. by way of Terry Fritz <twftesla-at-uswest-dot-net>" <matt777777-at-hotmail-dot-com>

I am nearing the point where I will fire up my coil for the first time (thanks
to those who responded to my "where to stop the house ground" - Gary Lau, after
reading your comments on your web site re: EMI filter hookup and looking the
schematic of mine, it's a no-brainer - thanks).
*** My question now is what are practical limits for distance between my coil
and computers, etc.  I have cheap 486's for my kids ethernetted (?) throughout
the house to my good computer... and  then the usual wiring, phone lines, Tv,
etc.  Not a lot of indoor space, but I'd really like to be able to run it
My Coil: 12kv/60ma NST, ~20" o.d. primary, 4.25" secondary, 17" o.d toroid.
I'm really hoping for comments from people based on actual experience as
opposed to: "you'll fry your brother's first grade teacher's dentist's 2nd
cousin's neighbor's pepper grinder in Latvia"  (no offense to Latvians).
But comments about what was actually fried unintentionally by people, and how
close/why would be great! (and especially how you would avoid it now).
(Christopher Boden, I noticed a post from you where you ran a coil in an
Internet Cafe? -- how far from the nearest computer? ... ).
Naturally, I have to add that I'm hoping to avoid a Faraday cage.
I purposely put this question off until it was almost done, so I could trick
myself into not being subject to the "what was I thinking" phenomenon (but it
didn't work).
Thanks in advance,

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