RE: Microsim and filter design

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

Original poster: "Terry Fritz" <twftesla-at-uswest-dot-net>

Hi David,

	You want the filter to reduce the high frequency ringing that reaches the
transformer.

http://hot-streamer-dot-com/TeslaCoils/Misc/Filter.jpg

skows that one the gap side of the filter there is significant high
frequency signal but on the transformer side the high frequency noise is
vastly reduced.

Cheers,

	Terry


At 05:21 PM 1/21/2001 -0600, you wrote:
>Hi Duncan,
>
>I plugged the schematic from your transients1.gif into Microsim using the
>values you suggested. It seemed to work OK, however I was not sure what I
>was looking for, that is in relation to a Tesla coil, so I got a copy of
>Terry's simulation of a NST powered Tesla coil
> http://hot-streamer-dot-com/TeslaCoils/Misc/Newcoil.sch ) which is a very
>complete model and ran simulations of the filter voltage (across each side
>to ground), output voltage (toroid), and streamer current. I then
>substituted the filter you suggested and repeated the simulations both with
>and without the damping resistor. Results can be found at
>www.corridor-dot-net/deano/NewFiltr.zip . (336KB)
>
>This seems to work OK in the simulator, someone should try this on a real
>coil.
>
>later
>deano
>
>>
>> Hi Folks!
>>
>> I've recently unearthed a potentially (pardon the pun) very
>> useful circuit for filter application.  I've passed the
>> details to Terry off list and his response I have put below.
>> The file referred to, transients.zip, which is around 65k,
>> should appear shortly at
>>
>> http://hot-streamer-dot-com/temp/transients.zip
>>
>> This circuit promises to perform very well with much less
>> power consumed than the conventional filters we have been
>> using up to now.  For those who relate to this, the file
>> includes a theoretical derivation (Heaviside's operational
>> calculus) of its operation.  I'd be grateful if those of you
>> with microsim experience would give this filter circuit the
>> once-over (or more, depending if it rings ;-)  I'd suggest
>> values of 20mH for "little L", 160mH for L, 1nF for C and
>> 6,9k for R.
>>
>> Thanks.
>> Dunckx
>Snip
>