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Re: Filter Choke Design

tesla-at-grendel.objinc-dot-com On Mon, 11 Mar 1996 10:00:45 +0700, you
wrote:

>>From ed-at-alumni.caltech.edu Sun Mar 10 11:13 MST 1996

>Subject: Re: Filter Choke Design
>
>Re: Filter Ringing
>Jim:  
>	Don't know what your model is, 
check  ftp.bdt-dot-com/home/jim.fosse/tank.* for the pspice dwg, cir, and
output files. I'm using perfect parts on this with no Esr of Esl
included.

>but you may well be
>right.  I have done some simulation here which makes me wonder
>at the effectiveness of series filters, unless they are damped
>with series resistance of the order of the 5000 ohms Malcom
>mentioned in his note.  

oops, I missed this, does someone? Malcolm? have references?

>5 k series resistors wouldn't drop the
>output voltage much, but they dissipate about 20 watts at 60
>ma load current, and would need to withstand the voltage.  I
>have been thinking of a string of 1 k, 10 watt wirewounds in
>series.
IF you put the wirewound resistors(inductive) on the neon side they
could only help(?)

>	Would be interested in more on your modeling and the
>results.  Bottom line is that I kind of suspect that the
>wrong kind of series filter might actually stress the transformer
>more, rather than less.  Of course, proper safety gaps may
>"save the day".
Ah ha, until you run it without a strike ring like I did last night!
Even my safety gap couldn't help!  I reached the point where I was
blowing arcs out thru, transformer oil, tupperware, 3/16" plexy, 1/8"
plexy  1.5" air gap down to the press board baseboard!

MY 0.060" single layer polyethylene cap. let the smoke out.

Did you know that all electronic components are made of smoke? Don't
believe me, let the smoke out sometime and see how they work:)

	jim