RE: [TCML] Sec design trade-offs and considerations

[Paul Benham <PaulB@xxxxxxxxxxxxxxxxxxxx>]

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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