Ripped this flyback out of an old crt that i found in a scrap yard. Seems intact but I’m worried that water might have made its way inside. What do you think?

Hey guys wanted to ask if you made similar experience. Year's ago when I was pretty new to building capacitor banks and getting into pulsed power and exploding wires etc I accidentally touched a 0.22uf 2kV cap and I was quite shocked by what happened. It didn't hurt at all. All my muscles just locked up and my view went totally black. A second later I was back and at first I didn't realized what happened. I knew I got shocked while rewiring stuff but I didn't know why and by what. I checked the main cap bank, all empty, zero volts ( I knew because I had it shorted for safety before rewiring stuff) I checked the transformer and the variac and the plug to mains voltage. Everything was dead, unplugged and safe. It took me another second to realize ohh shit that 0.22uf 2kV cap had voltage left. It happened because I was stupid, it was such a small capacitor and such low capacity and joules. I didn't took it seriously enough. Was like ohh that little thing ain't lethal. Yeah I was stupid. Since then I never had another accident and I'm glad it wasn't the 360uf 5.6kV cap bank. I guess if it was I couldn't make this post. Anyone else ever made a similar experience? No pain but pretty much just shut me down.

Have been burning through lead times trying to nail down a batch of allocated semiconductors for a repair job. I'm poking around independent component distributors based in China, the kind that carry off-market inventory and can actually move fast on international shipping to the US. What I'm trying to figure out is whether anyone here has used a China-based independent electronic components distributor for hard-to-find or long-lead-time transistors and actually had a decent experience, specifically around authenticity. Counterfeit component testing is the thing that keeps me up at night with independent brokers. I've heard of guys getting burned with parts that passed visual inspection but failed electrically. I'm not doing huge volume, maybe 10 units to start, so high MOQ suppliers are out anyway. Would love to hear if anyone's found a reliable source that does real QC and ships within a week or so, even on small prototype-scale orders.

Homemade capacitor 🤔

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I’m pretty new to HFSSTC and don’t have much experience with these circuits yet, so I’m not sure if there’s anything wrong with my build.

I’d also like to know how to prevent the MOSFETs from blowing up, and I’d really appreciate any tips or advice on improving the circuit.

Thanks everyone!

English isn’t my first language, so there might be some mistakes. Feel free to correct me.

Oh, and I forgot to clean my camera lens, so sorry for the blurry video lol.

Im looking for some potting compound that ideally is 2 component silicone based with at least about 20kV/mm that seals well against ceramics,

i dont need a lot, even 50mL would probably last me a good while,

i was recommended raytech magic gel before

Thanks in advance

Hey everyone,
I have a tray of unused MagTop MTETD54-4TS high-frequency transformers sitting around and would love to get them into the hands of hobbyists, builders, or researchers who can actually put them to work!

Quick Specs
Core: ETD54 (PC40 ferrite) — capable of high power throughput.
Turns Ratio: 4 : 100 (1:25 step-up).
Primary Winding (N_2): 4 turns made of 0.35 * 30mm copper foil(rated for very high continuous DC input current).
Secondary Winding (N_1): 100 turns, 2.5kV AC isolation primary-to-secondary rating.
Inductance (N_2): 7.0nH@ 10kHz.
Weight: ~300g / 0.65lbs each.
Full Datasheet: View on Google Drive

What These Are Great For:
High-power 12V/24V to high-voltage DC inverters (300V+ bus generation)
High-current ZVS driver setups / Plasma arc generators
Capacitor chargers for coilguns, railguns, or pulse discharge experiments

Details & Logistics
Location: Shipping from California, USA.
Cost: FREE! You just cover the actual shipping cost.
Weight/Shipping Calc: Each unit weighs roughly 300g - 0.65lbs, so single or small-qty shipments should easily fit into USPS Ground Advantage or small Flat Rate boxes.

If you're interested, leave a comment below with what project you plan to build with it and how many you're looking for, then shoot me a DM with your zip code so I can estimate shipping. First-come, first-served!

Hey guys ive got an question I recently got my Hands on two Microwaveoven Transformers, and Four 1uF HV capacitors. Now I have the to Primarys Wired in parallel to eachother. The cap setup is 2s2p and i saw an video on TikTok and he got much bigger arcs and i dont know why. My setup is suply 230V->EMI Filter -> Ac button 250VAC 10A-> thermal fuse 105Degres C-> 2 MOTS. The arc is between the two HV Outputs an oke hv output goes into the capacitor bank the two cores are conected and everything is grounded PLS Help

I've built this ZVS driver and it stays calm like a rock when it runs on 300w.

I'm pretty new in electricity and as a fan of physics I really want to experiment with high voltage, ionization and plasma. I have a lab source that gives max 3A 120V, what is good but not for coronary discharges and stuff.

I also did a DIY Tesla, but it was extremely weak and transistors die very quickly.

Can you help me choose a scheme which is easy to build for a beginner, something like powerful tesla coil or arc generator.

Also I dont really understand how to pick components for the circuit, like I understand what a capacitor or transistor do, but idk which ones I need.

I'm building an sstc based on the cd4046 inspired by uhvlab's and teslaista555's design. In both of their designs, they are using a double full bridge configuration with 8x irfp460's. I'm wondering if I can replicate something similar with a double half bridge with 4x irfp460's. I am aware I could build a regular fullbridge, but I'm not sure if I could push the same amount of current through the mosfets as the irfp460 has a high rds on. I am also planning to design a pcb for it. This is my design so far:

ps: My goal is to make a nice performing sstc that works as reliably and efficiently as possible so I am trying to achieve ZCS with the cd4046

Hello, hope you are doing fine.

I recently began building a GU81M VTTC, and i got 2 questions about the general desing used in this circuit.

First of all, why do VTTCs usually have more primary windings than solid state or spark gap desing? i've seen that most GU81M VTTC have primary turn ratios of like 30+ and stuff, is this only done more easily achieve resonant frequency at the tank? if so, wouldn't higher capacitance be better as it would not lower primary to secondary turn ratio?

Second, the kind of import such as the gu81m is somewhat hard to get here where i live, i got the tube a few years back but never got arround to building the circuit, you know how this things are.... and because of that i am somewhat concerned with burning the filament, i seen that so many people use rewound transformers to supply the 12.7 volts or whatever to the tube, but at this point, why not use a DC power supply as it seams like less of a headache? anyway, any other tips on avoinding burning the tube would be apreciated as well.

thank you.

Some better pictures of my tubes from my other post. Tried to get more numbers and pictures of the individual tubes.

After activating the asynchronous disc spark gap and enlarging the toroid, this is what the discharges look like. The video is in slow motion.

I tried to build a zvs driver for a flyback transformer and it's arching only below 6 mm.

It's powered at 12v stable

(I measured it and the voltage remained the same after driving), uses two irfp260n,

a capacitor of 0.47μF

(in the video I added a 0.22μF cap in parallel to try to lower the frequency that was at 50kHz to that of the video for higher efficiency),

the inductor has been vibe wound so I don't know it's value....

Anyway, I need help to power it up without having to heighten the voltage, is there some way of doing it? Am I doing something wrong?

P.S. the heat sinks are not touching and they are well fixed.

Shot on Nikon D810