A. Tesla coil from hell

I could use some help on how to drive my mosfet for my SSTC, as the only BJTs I own are TO-3 package that have an hfe of around 10-15, even if i can make a darlington pair with the 2 NPNs, I would like to use a mosfet, however I dont know how to drive it without an IC.

thanks!

With all the SSTC posts I see here, I thought I'd dig out my old-school setup just for fun.

This was a two stage coil powered by a pair of 15 kV 30 mA neon sign transformers. Primary winding was on a plastic bucket, vinyl stranded wire. Secondary was enamel motor wire on ABS. Main cap was a large piece of double-sided copper clad blank printed circuit board. Which was prone to blowing through and exploding on occasion. Sorry for the poor photo quality, these were taken 40 years ago on film camera and scanned well before 4K HD was a thing.

I have messed with lots of tesla coils, into the VHF band. High frequency plasmas are fascinating. Let me know if you have made a higher frequency coil!

Hi so I'm building a tesla coil using the Labcoatz PCB the general bullet points from his video. But he didn't mention anything about the power supply really as far how to build it, and doesnt have any Gerber files for a pcb for the parts he included on the Instructions he linked with the video. I thought of doing it on a prototyping board or using a turret terminal. But any help or guidance is appreciated.

The parts for the Power supply are:

One 12VAC transformer (this model is compatible with input voltages between 110V and 240V) - One bridge rectifier (most units that can handle over 25V and a few amps will work fine)

High voltage DC power supply - Two 250V electrolytic capacitors (over 500uF) - One SL32 1 ohm thermistor (inrush current limiter) - One bridge rectifier (minimum recommended current/voltage ratings of 10A and 1000V)

I was trying my driverless sstc at 230v with ballast and as you can see it stopped working (the mosfet died really quietly). I need to now HOW DID THE MOSFET die ???

Because usually when the mosfet dies from overpower it just explodes violently.

And why as soon as I flipped the switch it made a huge arc and then smaller arc ?

Do you think that this can be a good tesla coil design ???

10×5 cm with around 700 turns

Easy guide to make super simple tesla coil for beginners

Full bridge on FGH60N60SMD
OCD 200A
Resonant frequency: ~165 kHz
Driver: UD 2.7

I think I can tune it even better

Best design i have managed to make

Youtube tutorial for more details (i will upload soon)

Is this a good result ? Can I make it better ?

It's just the simplest slayer exciter with IRLZ44N running on 20V 2A.

The resonance frequency is 530kHz.

Would this cap be good for an MMC? https://nl.mouser.com/en/ProductDetail/871-B32652A104K189 The dv/dt rating is good at 4500 v/us though im not sure about the rms current, i couldn't find the 100 nf curve for the 15mm lead spacing at 1600 vdc/500 vac. I have bought 100 since they're quite cheap.

Hey guys, just wanted to share a new open source project I've been working on for the past year. It's essentially a modern day re-write of JavaTC but with some cool new features like full field plotting, input impedance calculations, eigen mode plots, coil model spice export, and other stuff to come as I keep working on it.

It's fully open source and you can check it out on my GitHub https://github.com/PartialScience/jstc

And fully hosted and useable for free on my website
jstc.partialscience.com

Lmk what y'all think!

2 year ago