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Re: RF Interference and Chokes
In a message dated 5/13/99 2:16:06 AM Pacific Daylight Time, tesla-at-pupman-dot-com
writes:
> Original Poster: Christopher Michaelis <cmichael-at-xmission-dot-com>
>
> Whenever I fire up the coil, my parents come out screaming and wailing
> because the phones, tvs (cable, not antenna), radios, and intercom (which
> is wired, not radio-based) are fuzzing about noisily.
>
> I've only got 2 little chokes from radio shack on it -- what do the tesla
> gurus recommend for protecting my 60hz line from feedback (is that what
> it's called?)
>
> Is there any other way besides a faraday cage to make my coil screw up
> radios a bit less? I'm quite far away from my house, so the neighbors can't
> be any happer than by parents.
>
> Thanks in advance
>
>
> Christopher Michaelis
Christopher,
I would advise to make sure you have a good RF ground for the bottom of the
secondary. Also connect the center contact of your safety gaps here as well
as the case of the neon sign transformer - if that is what you are using for
power.
I also use a separate ground rod for my 60 hz ground. The case of the AC
line filters as well as the case of the variac and any other items that
should be grounded in the control system should be connected here. Nothing
should go to the house third wire ground. I use this method of grounding and
have very little interference on the television. The cordless phone is
another story. It seems to be very sensitive. When the coil is running, you
don't use this phone.
You might also invest in some better line filters. I forget which mail order
place I ordered mine from but they were relatively inexpensive (surplus).
Ed Sonderman