Author Topic: Jimmy drsstc  (Read 394 times)

Offline paulj

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Jimmy drsstc
« on: March 09, 2021, 09:49:55 PM »
Hello
i came across this webpage a few months ago, i feel like this is one of the very first drsstc built.

http://www.capturedlightning.org/hot-streamer/chunkyboy86/index.htm

Offline Hydron

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Re: Jimmy drsstc
« Reply #1 on: March 10, 2021, 11:21:38 AM »
Yeah it was the first as far as I know. Before this people had started looking into IGBTs but mainly as a spark-gap replacement, rather than for actually driving the resonant circuit. The guy was at high school at the time I think too.

Offline futurist

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Re: Jimmy drsstc
« Reply #2 on: March 10, 2021, 11:44:54 AM »
Interesting! Based on build log dates and nickname he was 16-17 years old
Where is he now?

Offline paulj

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Re: Jimmy drsstc
« Reply #3 on: March 10, 2021, 02:03:30 PM »
Going into the google archives, the first site to refer to drsstc is Steve Ward's site in 2005, but indeed looking further, I have the impression that the first research on IGBTs on tesla coil dates back to 2002 if Steve passes on the forum, he could confirm it to us. ?

Offline Hydron

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Re: Jimmy drsstc
« Reply #4 on: March 10, 2021, 02:54:07 PM »
If you want to dig through some of the history, I'd start with the Pupman list archives:

https://www.pupman.com/

Offline futurist

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Re: Jimmy drsstc
« Reply #5 on: March 10, 2021, 05:10:35 PM »
Did you notice his website banner? :D


He ripped off my DRSSTC so I am ripping off his title

Offline paulj

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Re: Jimmy drsstc
« Reply #6 on: March 10, 2021, 06:04:41 PM »
yes it's funny.

trolling ? :o

Offline Steve Ward

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Re: Jimmy drsstc
« Reply #7 on: May 02, 2021, 05:15:38 AM »
Hah! that website still exists!

I think Jimmy was the first to exploit double resonance h-bridge drive in a "transient" mode to make big sparks at high peak power, and thus the first recognizable DRSSTC.  That first machine ended up making up to 8 foot sparks with over 1kA from CM150s, really, quite groundbreaking for a first go. 

At around the time he was working on that first coil we were trading notes a lot.  That first DRSSTC used a microcontroller to generate gate pulses at a fixed frequency.  I was experimenting with "interrupted SSTCs" at that time where I began to stumble into near double resonance as my DC blocking capacitor started to resonate with some very low primary inductance, but it was Jimmy that helped me realize that and push it further.  I don't really think I invented anything in particular, but I did put out a number of decent designs that seemed to become standard. 

Like some sort of weird "high voltage forum fairytale", I actually work (remotely) with Jimmy, doing motor/inverter research and design. 


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Re: Jimmy drsstc
« Reply #7 on: May 02, 2021, 05:15:38 AM »

 


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