Hello Greg,
Very impressive coil. The biggest that I have seen since that one in Oklahoma on rails a number of years ago. I don't have much experience with solid state coils as this one appears to be. Wouldn't it be easier and more reliable to use spark gap technology for a coil of this size and power level? My question is prompted by your picture of a blown IGBT which I am sure costs hundreds of dollars. But then again maybe you have a special application in mind that requires a variable firing rate or something else that I don't know about. Or maybe it is just the challenge.
Steve White
Cedar Rapids, Iowa
----- Original Message -----
From: "Greg Leyh" <lod@xxxxxxxxxxx>
To: tesla@xxxxxxxxxx
Sent: Tuesday, November 20, 2018 9:05:51 PM
Subject: Re: [TCML] Where is everyone?
Hi Steve,
I didn't post anything, since no one complained until now. ;>
Here's a 1/3rd scale prototype coil that I just finished, trying to run
at full output: https://www.lod.org/40ft-coil.html
Cheers,
Greg
On 11/20/2018 2:16 PM, tesla-request@xxxxxxxxxx wrote:
> Message: 5
> Date: Tue, 20 Nov 2018 09:54:14 -0500 (EST)
> From: Steve White<steve.white1@xxxxxxxxx>
> To: Tesla Coil List<tesla@xxxxxxxxxxxxxxxxxx>
> Subject: [TCML] Where is everyone?
> Message-ID:
> <38386862.25413530.1542725654848.JavaMail.zimbra@xxxxxxxxx>
> Content-Type: text/plain; charset=utf-8
>
> When I first joined the TCML back around 2002,I used to receive about 20 messages per day from the TCML. Now, I am lucky if I see a single message every few days. On occasion, I will see periodic bursts of postings in response to specific questions from members. Have all the members moved on to other interests or died? We need to determine a way to get new people interested in this hobby. I fear that most of the potential younger members are absorbed in computer-related things. There is nothing wrong with that. I spent most of my engineering career developing real-time embedded DSP software. We just need to discover a way to expand their interests into the world of physical hardware, especially high voltage. I built my first tesla coil, a small VTTC, when I was 16 and this is what got me interested in electrical engineering as a career. I periodically display my coils to kids in my neighborhood. I also plan to take my smaller coils around to schools for demonstrations.
>
> Thoughts?
>
> Steve White
> Cedar Rapids, Iowa
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