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Re: Unexpected Shock From TC
I have several extra secondary coils setting around on the work bench.
After running my TC for a minutes or so all the secondary coils on the work
bench become charged up. They are not connected to anything. They will
hold a charge for several minutes. I can put my finger close to any of the
coils and get a 1/4" spark jump from the coil to my finger. Also anything
in the room that is insulated will also get a static charge.
Gary Weaver
At 12:03 PM 5/5/99 -0600, you wrote:
>Original Poster: Brent L Caldwell <stretchmonster-at-juno-dot-com>
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>To Bill Langston, and all coilers:
>
> I noticed in your post that you (Bill) wrote that you got a shock by
>touching the TC long after it was turned off. I know of two reasons why
>this might happens, and how to fix each of them.
> One cause is that the tank capacitor can hold quite a charge after the
>coil is shut off. It usually bleeds off through the circuit after a few
>seconds, maximum. However, according to Terry Fritz, if some connection
>in the circuit is disconnected, this bleeding off may not happen. Ask
>around for ideas about bleeder resistors across the tank capacitor, and
>other ways to fix this.
> More likely, though, is that the secondary can hold a charge, too. I'm
>not sure if it has to do with the self capacitance of the coil, or the
>varnish on it, or what. However, I know that most big coils I have seen
>could give quite a zap if you touched the secondary, even several minutes
>after operation. Usually, the operator would take a grounded wire and
>touching it to the secondary to remedy this.
>
> Again, just thoughts of mine.
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> Brent
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