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Re: [TCML] Sec design trade-offs and considerations
Hi Paul,
Not sure what you are getting at with self res freq ? I don't know what it
is and doubt I would be able to measure it. The caps are supposed to have
zero L&R though think that's a bit of a lie in the datasheet as they must
have *some*.
They are all flat plate caps, over 200 of them in parallel. Any problems
there would probably be self inflicted with all the wiring, though they are
fixed between 2 large sheets of copper sheet and all kept as physically
close as possible. I can send you some images off list if needs be.
Chris
----- Original Message -----
From: "Paul Benham" <PaulB@xxxxxxxxxxxxxxxxxxxx>
To: "'Tesla Coil Mailing List'" <tesla@xxxxxxxxxx>
Sent: Tuesday, November 27, 2007 10:44 AM
Subject: RE: [TCML] Sec design trade-offs and considerations
Hi Chris,
Have you measured your capacitors self resonant frequency?
Cheers,
Paul
Paul Benham
Senior RF Engineer
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-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of Chris Swinson
Sent: 24 November 2007 16:01
To: Tesla Coil Mailing List
Subject: Re: [TCML] Sec design trade-offs and considerations
John ,
Chris,
It sounds to me that you're planning to use the SCR to replace the spark
gap. The tank will ring down while the SCR is turned *on*. The SCR will
extinguish when the energy rings down sufficiently. If this is what you
plan, it's not a new idea. I've used SCR's in this way in Tesla coils,
Lou B. has done it, Malcolm W. has done that and probably others too.
Terry's SISG coils use the same concept except he used an IGBT which
is kept on during the transfer time. The overall concept being that the
solid state
device is not switched at the RF frequency, but rather at the break-rate
frequency.
John
True the SCR idea is not a new idea. You are correct in what you say. Though
whay should be a new idea is to use 2mhz high Q system and a 1,000uF tank
cap all at low voltage... If this has already been done before then I would
like to review the specs and data, would save me weeks of time in
development! I started this project about 8 months ago now :-(
Chris
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