Re: T.C. Phone Home
Subject: Re: T.C. Phone Home
From: jim.fosse-at-bdt-dot-com (Jim Fosse)
Date: Wed, 24 Apr 1996 00:49:30 GMT
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On Tue, 23 Apr 1996 08:30:12 +0700, tesla-at-grendel.objinc-dot-com, you
>Subject: Re: T.C. Phone Home
>>Question : to what was the coil earthed? Also, were you effectively
>>using the building reinforcing as a strike return path?
>The bottom of the secondary is tied to a #0000 welding cable 15 feet
>long. This cable connects to a ten foot long galvanized commercial
>ground rod driven into the ground just outside of my test room.
>Overhead strike wires below my overhead lighting circuits, and 2 inch
>grid chicken wire mesh strike shield spaced 2 inches away from the
>one inside wall adjoining the rest of the building also tie in to this common
>ground point. Aside from the meshed wall, two walls and the roof are
>sheet metal. Since I have installed my strike wires and mesh I
>hardly ever actually hit the metal building walls directly. The fourth wall to
>the test room is a giant wooden door which alllows a full 12 foot high coil
>system to be wheeled outside for more serious high power tests.
>AC service ground is not tied to my TC secondary/strike ground, it has its
>own ground rod 30 feet away at the other end of the building where the AC mains
>come in underground, and where the overhead telephone lines come in and have
>their ground protection carbon blocks tied to the AC ground.
I'm going to resuggest a magnetic influence in light of your
grounding system. I am assuming here, that you do have RFI filters in
the power line to your TC.
If you have a portable cassette system, have someone listen to
it with a blank tape installed while you run your TC. Also try an AM
radio tuned to a "quiet" portion of the band.