Re: Electronics shielding

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Richard W. by way of Terry Fritz <teslalist-at-qwest-dot-net>" <potluck-at-xmission-dot-com>

Hi all,
Those chips sound great and I suppose they may have inherent
anti-electrostatic architecture however it's OP-Amps I'll need to use,
mostly the LF347 and LM324. The supply pins will all have monolithic bypass
caps. I had totally forgotten about ground loops and thanks for jogging my
memory about that. Metal enclosures will be no problem. I've aquired several
stainless steel boxes about 4" x 6" x1 1/2" since the advice about using
metal enclosures and will shield the control enclosure as well. Thanks!!

What I have on the drawing board is electronic control of AC current in a
main control station that will be at least 20 to 25 feet from the coil
itself  After following the advice in previous posts that leaves the main
output cable, 30 feet 4/4, as my last concern that will provide up to 40
amps to a 10Kva pig further down the line. Electronics is one thing but
electrical is quite another and that's what I'm weak in. How can I protect
that cable? I'd hate to have to buy something with shielding like romex to
handle that much current.

Thanks again for the previous advice! <thumbs up>

Rick W.
Salt Lake


----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, March 31, 2003 10:01 PM
Subject: Re: Electronics shielding


 > Original poster: "by way of Terry Fritz <teslalist-at-qwest-dot-net>"
<dhmccauley-at-spacecatlighting-dot-com>
 >
 > Its just a simple PWM controller IC.  There are hundreds of them out there
 > that all do the same function.  There are probably thousands of Switch
Mode
 > Power Supplies using this
 > IC so its not suprising to find them in your computer power supplies.  The
 > only reason I really use it is because I have box loads of them here.  555
 > timers and other similar chips will do
 > the same thing.
 >
 > The Captain
 >
 >
 >  > Ot but anyone here have any experance using the tl494 outside of tesla
 > coil
 >  > work? They are found in computer power supplys commonly, sometimes
known
 > as
 >  > ka7500 or db494
 >  >
 >  > >3. Don't use any ICs except the 555 and the TL494 ;)
 >  > >
 >  > >You can see how my OLTC is put together at:
 >  > >
 >  > >http://www.scopeboy-dot-com/t3fnq.html
 >  > >http://www.scopeboy-dot-com/tesla/oltcpics.html
 >  > >
 >  > >Steve C.
 >  > >
 >  > >http://www.scopeboy-dot-com/
 >  > >
 >  >
 >  >
 >  >
 >  >
 >  >
 >
 >
 >