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Re: Commercial SSTC



Original poster: "Gav D" <gdingley@xxxxxxxxx>

Hi Mike,
I think the supply to the H-bridge is controlled via an SCR,
i.e.instead of using an in-line rectifying diode, and thyristor is
used instead, like a lamp dimmer. The phase controlled waveform with
this arrangement will introduce the necessary harmonics to give that
disruptive discharge effect. A reservoir capacitor of just the right
size may even give the disruptive discharge exponential
characteristic.

Gavin

On 6/24/06, Tesla list <tesla@xxxxxxxxxx> wrote:
Original poster: "Mike" <mike.marcum@xxxxxxxxxxxx>

I've seen that on ebay a few times. The "safer" waveform thing sounds
like snake oil to me. The pic doesn't show his feet. The energy has
to go somewhere no matter the waveform, most likely that left rf
burns at the strike points and worse ones where they exit on his
feet, esp if he has shoes on with poor contact to ground. I'd like to
see a video of that to tell how long he kept his arm there. Can't be
certain without buying one and measuring it, but looks like by the
sparks the waveform is a cross between disruptive and
continuous,  probably using a driver circuit similar to Terry's, but
not user programmable, and no primary resonant circuit that a drsstc
has. Too bad I can't rent one of those to reverse engineer it, if it
turns out to not be snake oil they just made farady suits for
stuntmen obsolete, assuming it can be scaled up like a conventional coil.

Mike

----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Saturday, June 24, 2006 10:06 AM
Subject: Commercial SSTC


>Original poster: "S&JY" <youngsters@xxxxxxxxxxxxxxx>
>
>Coilers,
>
>I ran across a website of a company that manufactures and sells SSTCs. See
>http://www.teslacoil.net/images/SSTC-3-disWEBBuy.htm .  According to the
>description and photos, it uses 4 IGBTs in an H-bridge, with power to it
>controlled by an SCR, runs a max of 240 volts on the
>primary, produces about 36 inch leaders, and apparently is not a DRSSTC. It
>produces "safer waveforms"--anyone know what that means?  Does anyone have
>any details on its circuit, theory of operation, etc.?  It
>sells for about $500 and includes a lifetime repair warranty (a gutsy thing
>to do in my opinion).
>
>On the negative side, there are pictures of the leaders from the SSTC-3
>jumping to someone's hand and arm, and claiming that it produces much milder
>unpleasant reactions than does a DRSSTC or SGTC.  Even though he says one
>should not perform that experiment themselves, pictures speak louder than
>words and may lead others to try it with unfortunate results.  DON'T DO
>THAT!
>
>Anyway, if you know something about this particular SSTC, please share it
>with the rest of us.
>
>Thanks,
>--Steve Y.
>
>