RE: [TCML] Spark gaps, Solid state switches and diodes

["Gary Peterson" <g.peterson@xxxxxxxxxxxx>]

> What circuit schematic are you referencing?  

That would be Terry's at http://www.teslaboys.com/SISG/SISGSchematic.pdf .

> It sounds like you're attempting to achieve a CW or near-CW mode of
operation.

Correct, the objective is to create undamped or partially damped
oscillations in the helical resonator.

> . . . SISG-driven coils are by definition, disruptive.

The term "disruptive discharge Tesla coil" derives from the specific type of
circuit controller or switch, colloquially known as the "spark gap," located
in the primary circuit.  The fact is, neither solid-state nor vacuum tube
Tesla coils, nor those driven by modified RF alternators are disruptive
discharge Tesla coils, sparks or no sparks.

G.P.

-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of Lau, Gary
Sent: Friday, February 06, 2009 9:16 AM
To: Tesla Coil Mailing List
Subject: RE: [TCML] Spark gaps, Solid state switches and diodes

What circuit schematic are you referencing?  Adding a spark gap to a circuit
using an SISG seems like wondering where the hay goes in a horseless buggy.

It sounds like you're attempting to achieve a CW or near-CW mode of
operation.  I'm not sure that's possible, as spark gap and SISG-driven coils
are by definition, disruptive.

Regards, Gary Lau
MA, USA


> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of Gary Peterson
> Sent: Friday, February 06, 2009 10:31 AM
> To: 'Tesla Coil Mailing List'
> Subject: RE: [TCML] Spark gaps, Solid state switches and diodes
> 
> Would an adjustable hyperbaric spark gap placed in between upper end of R1
> and the collector of the first IGBT provide SISG quenching?  The idea is
to
> have the transistors initially close the switch, as usual.  As the primary
> capacitor the voltage decreased the voltage drop across the quench gap
would
> also decrease and the spark would extinguish itself.  The idea is to turn
> the circuit controller switch off before the second primary capacitor
> discharge cycle begins.  I've also seen a sulfur hexafluoride filled
> adjustable spark gap, which might be used for the same purpose; that was
at
> Golkaland, CO.
> 
> Bart Anderson might want to investigate such a modification to his SISG
> machine in preparation for his upcoming experiments.
> 
> G.P.
> 
> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf
> Of DC Cox
> Sent: Wednesday, February 04, 2009 6:36 PM
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] Spark gaps, Solid state switches and diodes
> 
> Install a hyperbaric spark gap and you will be really amazed at the
> performance increase.
> 
> Dr. Resonance
> 
> 
> 
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> Tesla@xxxxxxxxxxxxxx
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