After some talks with Claude about the design, it seems the pulse trigger described in the Korean patent would be the best. Discharging an inductor is just too slow (unless you already have high voltage PSU!). But then one needs to get the 300 V from somewhere which is not so clear to me how to do, unless you can rectify mains voltage through a VARIAC which I can try. Maybe instead of 1:1 transformer it could be 1:10 and a PSU with 30V. That could work.
So the parameters that would make sense for the pulse transformer is a ferrite core (E core), 18 turns primary 0.8 mm, 180 turns secondary 0.3-0.4 mm, the capacitor could be 10-20uF 500 V, the mosfet IRF840A. And maybe it will be possible to get to at least 2kHz pulsing. Now let's say we can have 10-2000 Hz pulses, with two C1 and C2 100 nF capacitors in the resonant circuit, the inductor L1 would have to be between higher than 66 mH...which is quite some turns of wire. For comparison, a coil with 100 turns of 0.8 mm wire with a 6x3x3 electrical steel core has 3 mH, another one with 170 turns has 7mH.
Then there is a possibility to work with an SCR instead of a MOSFET, which would make things easier, but no matter how I try, I cannot get higher than 333 Hz with a PSU that can do 30V 10A. Unless we use a bank of 4 capacitors, which I'd like to avoid if possible.
The voltage of the pulse only needs to be as high so it triggers the spark gap, or other negative resistance device. It is possible to get a spark gap at 75 V or 90 V.
I can recommend putting the patent and the specific circuit to Claude or ChatGPT and ask about that it is supposed to do and how. It explained me the pulse transformer yesterday and helped design it. It is possible to for example give it a list of parts that I have at home and it will try to make do with that. It needs some critical thinking and guidance, but it helps a lot.
07-10-2025, 06:42 AM (This post was last modified: 07-10-2025, 06:43 AM by andy.)
Hi kloakez,
thank you for your interest.
I took some days pause.
I tested some parts based on Coke Machine. I first do things without resonance and I try to get some gains. I think resonance helps to build up voltage. But I need current to create magnetic field in transformer to get output and get feedback somehow.
Instead of resonance I try pulse it manually by nmosfet on lowside, but not success yet.
I must to try harvest inductive kickback from primary coil collapse to put it back into capacitor C1.
I charge C1 by ZVS 35kHz stepped up to some hundreds of volts and instead of Varistor I have spark gap to surge overvoltage of cap. I tried 500V 1uF cap and input 35kV AC rectified to DC pulses (high voltage 1000V pulses putting into 500V cap is ok, because it takes many pulses to charge it to 500V and if it goes up surgearrester (parallel MOV or spark gap) fires and keeps cap voltage ok).
Then by nmosfet I discharge it into primary - I tried different duty cycles at 60hz, 200hz etc (not high freq).
Byt I had very resistive primary, so now I want low resistance primary to create high current when discharged. I think it could help me to get some results.
I work sometime with ChatGPT, I also try Claude, thanks for recomendation.
Hi Kloakez.
You could use tiny xenon strobe trigger transformer with SCR to fire it. A cap discharges into the primary of the strobe through SCR. Circuit: Cap pos to primary coil and SCR gate via Zener diode of chosen voltage (about 150v). SCR annode to other end of primary coil and cap negative to SCR cathode. Resistance value between cap and power supply sets frequency. The trigger transformers are cheap and size of a small coin. Made specifically for ionising a "spark gap".
Kind regards, Sandy.
07-12-2025, 09:07 PM (This post was last modified: 07-12-2025, 09:08 PM by Sandy.
Edit Reason: Spelling
)
Here it is with a xenon bulb as the "spark gap" the trigger transformer is the little yellow thing near the pot and i am using 3 series neons instead of a zener. This was from a different experiment but would maybe suit you current needs. Kind regards, Sandy.
your setup sounds interesting and I think it should have some interesting results. I like that you are using quite high voltage, that is more dangerous but more likely to yield results.
This guy is using the Zilano Full Disclosure circuit: https://www.youtube.com/watch?v=SNXMafJ58P4
Check the comment by Rick Friedrich, I have read it multiple times over a couple of weeks and every time it tells me a little bit more about how these things work. A spark or some sort of high dv/dt pulse (fast discharge) will create a lot of disturbance that can be harvested using a transformer (as in the video), or a battery.
And I found this comment by XRIX pretty interesting: "The HV side has the most capability of creating magnetism. So the caps reference that coil as the primary. The spark gap is a simple solution, but if you keep trying, you will be able to make it solid state. The power of the device, is seated at the size of the capacitor and how fast you can charge and switch it. and your transformer's ability to manifest the magnetic flux. If you can optimize those four parameters, you will have success."
Thanks for the suggestion Sandy, I was not aware it is possible to get xenon bulbs such as you show in the video. That would be significantly better than a spark gap. I thought it was necessary to prime them with some high voltage pulse and then they will spark based on some lower voltage. But it seems you didn't have to do that. Did you post your experiments anywhere? I would be interested in checking them out.
your setup sounds interesting and I think it should have some interesting results. I like that you are using quite high voltage, that is more dangerous but more likely to yield results.
This guy is using the Zilano Full Disclosure circuit: https://www.youtube.com/watch?v=SNXMafJ58P4
Check the comment by Rick Friedrich, I have read it multiple times over a couple of weeks and every time it tells me a little bit more about how these things work. A spark or some sort of high dv/dt pulse (fast discharge) will create a lot of disturbance that can be harvested using a transformer (as in the video), or a battery.
And I found this comment by XRIX pretty interesting: "The HV side has the most capability of creating magnetism. So the caps reference that coil as the primary. The spark gap is a simple solution, but if you keep trying, you will be able to make it solid state. The power of the device, is seated at the size of the capacitor and how fast you can charge and switch it. and your transformer's ability to manifest the magnetic flux. If you can optimize those four parameters, you will have success."
Thanks for the suggestion Sandy, I was not aware it is possible to get xenon bulbs such as you show in the video. That would be significantly better than a spark gap. I thought it was necessary to prime them with some high voltage pulse and then they will spark based on some lower voltage. But it seems you didn't have to do that. Did you post your experiments anywhere? I would be interested in checking them out.
Hi Kloakez.
The Xenon bulb does need a HV pulse to fire. I described the circuit in a previous post. The trigger transformers cost a few dollars. Look for "stobe light" parts. The xenons I'm using are only rated for something like 5 watts and have a limited lifespan, AFAIK. I haven't posted these experiments much because I haven't got OU and don't wanna waste your time.
Kind regards, Sandy
(07-20-2025, 06:42 AM)Sandy Wrote: Hi Kloakez.
The Xenon bulb does need a HV pulse to fire. I described the circuit in a previous post. The trigger transformers cost a few dollars. Look for "stobe light" parts. The xenons I'm using are only rated for something like 5 watts and have a limited lifespan, AFAIK. I haven't posted these experiments much because I haven't got OU and don't wanna waste your time.
Kind regards, Sandy
Oh right, you mentioned the strobe light, my mistake.
Well I think most of us don't have a workable OU, but the ones who experiment can learn from each other, inspire each other. I wouldn't say that just because you didn't get that thing that many of us are looking for and some spend decades to get that your experiments are a waste of time for us. Seeing how others approach the same problem can give you an insight and then you move further. Like now, when you showed me how to use the xenons.
07-26-2025, 05:08 PM (This post was last modified: 07-26-2025, 05:09 PM by kloakez.)
I think the resonance is important. I am close to resonance at around 235 Hz, with 100 nF capacitor (the one in series with the coil, the parallel one is not influencing the resonance somehow) and the coil has about 3H. What happens when I get close to resonance is that the spark gap starts firing like crazy, like cascaded firing. It fires twice for what would normally be one firing, then it fires three times for one firing when I get close to resonance. It is not so easy to describe. I'll try to start a build page and describe what I am doing, maybe it will be helpful to others. But it is not easy to achieve, the HV step up heats up very fast when I add power to get higher frequencies.
09-25-2025, 01:58 PM (This post was last modified: 09-25-2025, 01:59 PM by andy.)
Joel Lagace - Split The Positive
I like Joel's videos. And this one also, you should watch it.
And I was thinking about the circuit, how from one sine wave make two "square" waves and from each such "square" wave make sine wave again. Two from one.
Here is some idea
On left side scope is "Joel's square wave", or right side scope is output sine wave.
(only half of original sine wave is used here)
