Oh wow, great build! You Germans always are the best when it comes to high voltage stuff :D I love the fact that you use availible chinese HV components, and the corona and sparks look very beautiful!
I think You haven't seen russian videos yet😂 they are sketchy but they have most amazing HV content 😂 and also look sytopyro's YT channel... His experiments are out of mind 😂
Very nice, simple and easy to made build! The sparks were absolutely beatifull. I wanted to try this recently but didn't want to order a flyback from the web so I bought a old tube tv amd took the transformer from it. But I managed tp break the transformer and now I have to find a new tube tv. Rip 20€
the system I worked on provided milliamps, I don't remember exactly - maybe 5ma max. It was a very large expensive system. Full of sulfur hexafluoride. If you want one - I would estimate $100,000.00 or so would do it. good luck. @@TravisTellsTruths
Beatifull, great work!!!! I suggest that you insulate the flyback aswell. Maybe put it in a little jar of the same oil, probably it have some "leaking current" before the multiplier.
You have a 12 stage CW... is there a limit on how long it can be, as in, some practical issues when too many stages are present? I'm thinking of building (for reasons) a 22 stage CW which cranks up mains voltage of 120vac rms to 7.5kv dc
Hello! It seems tempting to increase the number of stages up to infinity. But you increase the internal resistance with each stage and then you will have additional problems like corona when you use too many stages and at too high voltage. My 12 stages are in the upper reagion of useful stage-numbers. With your low voltage you want to achieve I'd try it out. You want to use 120 VAC at the input. But at which frequency? Multipliers don't really work with low frequencies like 50 Hz. Therefore the input-voltage should have frequencies around 30-40 kHz. Otherwise you will have to increase the capacitance of your capacitors enormous... Good luck
So the large series resistor in your ground path is to tame the spark a bit but also to reduce the current flow through the diodes on discharge? Since the diodes are rated at 20 mA? The one I built only has 8 stages but I used 20,000 V diodes rated for 100 mA. I don't put any resistance between the gap and have had no issues with the diodes. I actually built 2 circuits, the second one with the diodes in the other direction up the capacitor ladder, so I get a positive charge atop one and a negative charge atop the other. Common the ground point and spark between the top loads.
Thank's. One diode with 20 kV could be not enough for 20 kV input voltage from the flyback transformer. Therefore I took 2 of them in series to be on the safe side
I have a very similar setup that arcs up to 10+ inches, but with 2CL2FM 20kV 100mA diodes. However when I use resistors on the output to limit the current, the arc distance decreases by more than half, so I'm stuck using only 11 ohms. Why do you think that is? Could it be that my resistors wattage is too low (I used ~10W)? Also, did you connect the transformer's black output (HV return) directly to earth ground? Thanks.
Hello! You use just a single 11 ohm resistor with 10W? This is far too less. I am using 10 resistors in series with total 120W. This is for protecting my diodes in the multiplier. Without the resistors I would get longer sparks too. But I want to avoid damaging my multiplier. You can often see setups without any resistor. This is very risky in my eyes. My resistors are located between the negative side of the spark gap and the bottom input point of the multiplier. This point is also connected to ground/earth...
@@stoppi No, the 11Ω resistor is 100W, but when I tried larger value resistors, I used 10W, and the sparks ended up very small :( I'll have to try it with a higher watt resistor but I'm just wondering if the reason the sparks were small is because the resistor wattage was too low, or if it was for another reason, like not enough current being transferred to the secondary / my turn ratio.
@@vusiliyK as I said, using resistors will always reduce the spark intensity and length because the spark itself has a low resistance. Therefore most of the voltage will fall off across the resistors and this limits the sparks... I use 11 kOhm resistors and 11 of them in series, so totally 121 kOhm... But you can go lower with your resistance when you want to increase the spark intensity. But this will also increase the possibility of a damage... It is also a question of how long your runs are.
If you need oil for insulation, do not use natural oils. Use vacuum pump oil instead, this is synthetic oil and the cheapest one is the oil used for milking machine vacuum pumps. Natural oils will oxidise and get rancid.
The red 40 kV wire should be replaced with spark plug ignition wire with stranded copper conductor (*not* resistance wire). Then put it inside of 3/8" (9.1mm) I.D. vacuum tubing for more insulation. But I was thinking that instead of all the Cockcroft Walton multipliers, use a Marx generator.
What happens if you remove the R resistpr to ground , the current limiting resistor. I understand that it limits the current, but what is the significance of reducing the current in your circuit ? Thanks
Hi! Good question. The resistor should limit the current to protect the diodes of the multiplier. If I don't use the resistor the sparks will get much more intense but the diodes will be more burdened...
@@jackspratt4343 unfortunately I haven't measured the current. But with the resistor the current-limit can be estimated with ohms law I = output voltage of the multiplier divided by the resistance...
I have very smillar one build year ago but it was very inefficient and unstable. I personally prefer series flyback supply or xray transformer. Voltage multipliers are too unstable for me do much components are making them easy to break if one capacitor fails it might not break the multiplier but will Heat up and burn eventually.
At 0:30 you can see the schematics. The AC-flyback transformer is connected to the input of the multiplier. One input is also connected to ground and then with the resistors to limit the current of the discharge...
@@stoppi Brilliant. I see now. Thanks. If I have any sensitive electronic equipment nearby, should I move it before switching on the current. Thanks again.
Hello! For lower voltages there's the 10 kV per cm rule. With increasing voltages this value decreases. Therefore the estimate voltage for 26 cm sparks is around 200 kV.
Hi! For example here: highvoltageshop.com/epages/b73088c0-9f9a-4230-9ffc-4fd5c619abc4.sf/de_DE/?ObjectPath=/Shops/b73088c0-9f9a-4230-9ffc-4fd5c619abc4/Products/TRANSHF_15KVAC
e.g. out of an old legacy cathode tube TV set. These things can handle up to maybe 30-35 kV. (which was used for acceleration of electrons across the evacuated cathode tube). The kV rating had something to do with the longestpossible distance between the emitter plate and the screen front. (how long the cathode tube actually was and how big the screen was as well in dimension)
@@alphaindustries5775 you can run it without the resistors but then the diodes may be killed. The sparks would be much brighter and powerful without resistors...
@@stoppi was ich nicht ganz verstehe: Wenn du einen 264 kOhm Widerstand hast, müsste sich, bei 200kV, doch eine Leistung von von 151 kW ergeben, oder? Da P = U^2/R.wie kommst du auf die 132 Watt?
@@gunrunner110 hallo! Die 132W ist die nominalleistung der Widerstände, nämlich 12 Stück in Serie zu je 11W. Deine Rechnung stimmt schon rein theoretisch, nur fällt in der Praxis wenn nur ganz kurz diese Leistung an den Widerständen ab. Da bricht ja sehr schnell die Spannung ein bzw. Liefert die Kaskade nicht genug Strom nach. Aber super, dass du alles so genau beobachtest und hinterfragst. Bin ähnlich gestrickt ;-)
Hello stoppi, its me again from Slovenia. I have a qestion... Do you maybe have a spare ac flyback transformer for sale? I cannot find it in my country :( it must be AC flyback
Hi Gregor! I would have one for you, but I'd like to have 18 Euro for it and shipping to slovenia would cost 12 Euro with hermes, which is the cheapest one. Therefore I think that you would get one on ebay for less money...
@@gregca1234 For 30 Euro including shipping to Slovenia I can offer you a new one like in the video. Otherwise you can ask at a local electronics store or television repair store...
@@peterplatzer4713 bitte ;-) gutes gelingen beim Versuch. Die verlinkten Dioden sind mit 100mA spezifiziert und eigentlich nicht teurer als jene üblichen mit 20mA...
Hello! As shown in the video I used 20kV/20mA high voltage diodes (2CL20kV) and 30kV/1nF high voltage capacitors. Good luck with your project and be careful 😉
@@stoppi how you calculated the values of components. Means if I need 60kv output and input is 8 kv then how do I calculate the value of the diode and capacitor. And how many diodes and capacitors are required?
@@chetansoni6299 you have to inform yourself about a multiplier. If it has n stages, the output voltage is 2*n times the peak of the input voltage. So if the peak of the input voltage is f.e. 8 kV and you have 5 stages, then the output voltage will be 80 kV. Each stage consists of 2 capacitors and two diodes. The capacitors should be chosen for 2-3 times the input voltage. Therefore I recommend 30 kV capacitors at 8 kV input voltage. Then you are safe...
Hi! I have sold one last week. Now there are "just" 3 pcs remaining and maybe I will need all of them. But look at highvoltageshop.at in the internet. They are selling AC transformers for around 27 euro...
Thanks for posting. Ready to party? If you have a minute, we just recorded an original dance song. As fellow music fans, we'd love if you would take a listen. It's on our page. Hope you like it!
Oh wow, great build! You Germans always are the best when it comes to high voltage stuff :D I love the fact that you use availible chinese HV components, and the corona and sparks look very beautiful!
@Gavin Fisher how very odd of you to post this under this particular comment to this particular video
I think You haven't seen russian videos yet😂 they are sketchy but they have most amazing HV content 😂 and also look sytopyro's YT channel... His experiments are out of mind 😂
@@idko5452 well, I'm russian myself 😅😂 and I've seen styropyro's channel of course. There's lots of great HV builders out there :)
Clearly you haven't seen Andy's videos on the Photonicinductions channel
Awesome work, the Interstellar music makes it 100 times better
The fact that this has music from Interstellar makes it 100 times better!
Thanks for the tutorial on a hvdc multiplier
Safety first. Great video.
That was SO awesome 👌
Very nice, simple and easy to made build! The sparks were absolutely beatifull. I wanted to try this recently but didn't want to order a flyback from the web so I bought a old tube tv amd took the transformer from it. But I managed tp break the transformer and now I have to find a new tube tv. Rip 20€
Good luck with your experiments and be careful 😉
This guy has great contributions to the ozone layer!😂
Great Project
yeah yeah, bake in the 80's I worked on a system with a 500kv CW system
this was at the X-ray microbeam lab at the university of Wisconsin.
Tell us how... please.
how? @@TravisTellsTruths
Yeah, I want 500kv right now but very low current.
the system I worked on provided milliamps, I don't remember exactly - maybe 5ma max.
It was a very large expensive system. Full of sulfur hexafluoride. If you want one - I would estimate $100,000.00 or so would do it. good luck. @@TravisTellsTruths
Impressive !
😲Its.. incredible... 👏
Damn boy that was epic
Beatifull, great work!!!! I suggest that you insulate the flyback aswell. Maybe put it in a little jar of the same oil, probably it have some "leaking current" before the multiplier.
Use glycerine or water, not oil. Water only of ultra pure and deionized
Bravo... Good design...
That was intense
Beautiful bro🥰🥰
Wonderfull. You can even do exorcism to possessed people with this arc.
Is there way to order ready or semiready circuit? Can it be used as bipolar ioniser?
You have a 12 stage CW... is there a limit on how long it can be, as in, some practical issues when too many stages are present? I'm thinking of building (for reasons) a 22 stage CW which cranks up mains voltage of 120vac rms to 7.5kv dc
Hello! It seems tempting to increase the number of stages up to infinity. But you increase the internal resistance with each stage and then you will have additional problems like corona when you use too many stages and at too high voltage. My 12 stages are in the upper reagion of useful stage-numbers. With your low voltage you want to achieve I'd try it out.
You want to use 120 VAC at the input. But at which frequency? Multipliers don't really work with low frequencies like 50 Hz. Therefore the input-voltage should have frequencies around 30-40 kHz. Otherwise you will have to increase the capacitance of your capacitors enormous... Good luck
@@stoppi bi polar (one positive, one negative). So exactly same setup just opposite polarity. It would be a monster. Actually already is. Nicely done.
So the large series resistor in your ground path is to tame the spark a bit but also to reduce the current flow through the diodes on discharge? Since the diodes are rated at 20 mA? The one I built only has 8 stages but I used 20,000 V diodes rated for 100 mA. I don't put any resistance between the gap and have had no issues with the diodes. I actually built 2 circuits, the second one with the diodes in the other direction up the capacitor ladder, so I get a positive charge atop one and a negative charge atop the other. Common the ground point and spark between the top loads.
Please show me this? A picture or schematic I'm new.
Very nice. Why two diodes across on the Cockcroft?
Thank's. One diode with 20 kV could be not enough for 20 kV input voltage from the flyback transformer. Therefore I took 2 of them in series to be on the safe side
Are you going to use it for the parcel thieves ?
(Good work 👍)
Nice - but would like to see more sparks
I have a very similar setup that arcs up to 10+ inches, but with 2CL2FM 20kV 100mA diodes. However when I use resistors on the output to limit the current, the arc distance decreases by more than half, so I'm stuck using only 11 ohms. Why do you think that is? Could it be that my resistors wattage is too low (I used ~10W)? Also, did you connect the transformer's black output (HV return) directly to earth ground? Thanks.
Hello! You use just a single 11 ohm resistor with 10W? This is far too less. I am using 10 resistors in series with total 120W. This is for protecting my diodes in the multiplier. Without the resistors I would get longer sparks too. But I want to avoid damaging my multiplier. You can often see setups without any resistor. This is very risky in my eyes. My resistors are located between the negative side of the spark gap and the bottom input point of the multiplier. This point is also connected to ground/earth...
@@stoppi No, the 11Ω resistor is 100W, but when I tried larger value resistors, I used 10W, and the sparks ended up very small :( I'll have to try it with a higher watt resistor but I'm just wondering if the reason the sparks were small is because the resistor wattage was too low, or if it was for another reason, like not enough current being transferred to the secondary / my turn ratio.
@@vusiliyK as I said, using resistors will always reduce the spark intensity and length because the spark itself has a low resistance. Therefore most of the voltage will fall off across the resistors and this limits the sparks... I use 11 kOhm resistors and 11 of them in series, so totally 121 kOhm... But you can go lower with your resistance when you want to increase the spark intensity. But this will also increase the possibility of a damage... It is also a question of how long your runs are.
is wonderfull
If you need oil for insulation, do not use natural oils. Use vacuum pump oil instead, this is synthetic oil and the cheapest one is the oil used for milking machine vacuum pumps. Natural oils will oxidise and get rancid.
Where did you find the AC flyback?
I have bought mine from a member of a german high-voltage-forum.
The red 40 kV wire should be replaced with spark plug ignition wire with stranded copper conductor (*not* resistance wire). Then put it inside of 3/8" (9.1mm) I.D. vacuum tubing for more insulation.
But I was thinking that instead of all the Cockcroft Walton multipliers, use a Marx generator.
What happens if you remove the R resistpr to ground , the current limiting resistor. I understand that it limits the current, but what is the significance of reducing the current in your circuit ? Thanks
Hi! Good question. The resistor should limit the current to protect the diodes of the multiplier. If I don't use the resistor the sparks will get much more intense but the diodes will be more burdened...
@@stoppi ok. thanks for that answer.It's to prolong longevity of the components.
@@jackspratt4343 yes, exactly. But to create more remarkable sparks it would have been better not to use those resistor...
@@stoppi one more question of you don't mind. Do you have an estimate of the current WITH the limiting resistor AND without, please.
@@jackspratt4343 unfortunately I haven't measured the current. But with the resistor the current-limit can be estimated with ohms law I = output voltage of the multiplier divided by the resistance...
How does the flyback transformer help ? Thanks
You need an AC high voltage source at the input of the multiplier. In my case I used a flyback transformer powered by a zvs-circuit...
this is a Soviet high-voltage transformer?
Bro is a totaly thanos in crating hv volts
I have very smillar one build year ago but it was very inefficient and unstable. I personally prefer series flyback supply or xray transformer. Voltage multipliers are too unstable for me do much components are making them easy to break if one capacitor fails it might not break the multiplier but will Heat up and burn eventually.
What does ac flyback do ???
You need a high voltage AC power supply at the input of the multiplier 😉
When you create the spark at the end, is one of the 'terminals' just a wire connected to ground ? Thanks
At 0:30 you can see the schematics. The AC-flyback transformer is connected to the input of the multiplier. One input is also connected to ground and then with the resistors to limit the current of the discharge...
@@stoppi Brilliant. I see now. Thanks. If I have any sensitive electronic equipment nearby, should I move it before switching on the current. Thanks again.
@@jackspratt4343 yes, I would remove them which are too near to the sparks and high voltage... Good luck
@@stoppi Will do, thanks.
How come 200kv? I thought 3.4MV/m so muxh further jump
Hello! For lower voltages there's the 10 kV per cm rule. With increasing voltages this value decreases. Therefore the estimate voltage for 26 cm sparks is around 200 kV.
nice video. Where can I get a flyback transformer like this?
Hi! For example here: highvoltageshop.com/epages/b73088c0-9f9a-4230-9ffc-4fd5c619abc4.sf/de_DE/?ObjectPath=/Shops/b73088c0-9f9a-4230-9ffc-4fd5c619abc4/Products/TRANSHF_15KVAC
e.g. out of an old legacy cathode tube TV set. These things can handle up to maybe 30-35 kV. (which was used for acceleration of electrons across the evacuated cathode tube). The kV rating had something to do with the longestpossible distance between the emitter plate and the screen front. (how long the cathode tube actually was and how big the screen was as well in dimension)
why the resistors by the spark gap?
to protect the diodes in the multiplier during the short circuit (sparks)...
@@stoppi Thank you :)
@@alphaindustries5775 you can run it without the resistors but then the diodes may be killed. The sparks would be much brighter and powerful without resistors...
@@stoppi was ich nicht ganz verstehe: Wenn du einen 264 kOhm Widerstand hast, müsste sich, bei 200kV, doch eine Leistung von von 151 kW ergeben, oder? Da P = U^2/R.wie kommst du auf die 132 Watt?
@@gunrunner110 hallo! Die 132W ist die nominalleistung der Widerstände, nämlich 12 Stück in Serie zu je 11W. Deine Rechnung stimmt schon rein theoretisch, nur fällt in der Praxis wenn nur ganz kurz diese Leistung an den Widerständen ab. Da bricht ja sehr schnell die Spannung ein bzw. Liefert die Kaskade nicht genug Strom nach. Aber super, dass du alles so genau beobachtest und hinterfragst. Bin ähnlich gestrickt ;-)
Hello stoppi, its me again from Slovenia.
I have a qestion... Do you maybe have a spare ac flyback transformer for sale? I cannot find it in my country :( it must be AC flyback
Hi Gregor! I would have one for you, but I'd like to have 18 Euro for it and shipping to slovenia would cost 12 Euro with hermes, which is the cheapest one. Therefore I think that you would get one on ebay for less money...
@@stoppi hi, i already searched ebay for it and its about 20€ but its around 35€ shipping and thats too much :(
@@gregca1234 For 30 Euro including shipping to Slovenia I can offer you a new one like in the video. Otherwise you can ask at a local electronics store or television repair store...
@@stoppi yes please , can you tell me your email adress that can i tell you my adress ? Thank you again :)
@@gregca1234 did he ever send it?
Anti-Theft device.
let me get this straight... you spent 500€ in diodes? ... great work btw, cool results
Hi! No, not 500 Euro but about 40 Euro for the diodes...
Can I have the links for the parts
diodes: de.aliexpress.com/item/1185394297.html?spm=a2g0s.9042311.0.0.27424c4dsDZHjH
capacitors: de.aliexpress.com/item/32904849899.html?spm=a2g0s.9042311.0.0.27424c4dsDZHjH
Danke
@@peterplatzer4713 bitte ;-) gutes gelingen beim Versuch. Die verlinkten Dioden sind mit 100mA spezifiziert und eigentlich nicht teurer als jene üblichen mit 20mA...
Danke
Sir i want to know how select components value please help.
Hello! As shown in the video I used 20kV/20mA high voltage diodes (2CL20kV) and 30kV/1nF high voltage capacitors. Good luck with your project and be careful 😉
@@stoppi how you calculated the values of components. Means if I need 60kv output and input is 8 kv then how do I calculate the value of the diode and capacitor. And how many diodes and capacitors are required?
@@chetansoni6299 you have to inform yourself about a multiplier. If it has n stages, the output voltage is 2*n times the peak of the input voltage. So if the peak of the input voltage is f.e. 8 kV and you have 5 stages, then the output voltage will be 80 kV. Each stage consists of 2 capacitors and two diodes. The capacitors should be chosen for 2-3 times the input voltage. Therefore I recommend 30 kV capacitors at 8 kV input voltage. Then you are safe...
@@stoppi what will be value of capacitor and diode?
@@chetansoni6299 diode: 20mA/20kV, capacitor: 1nF/30kV
Someone tell electroboom
Kool, but please not that music
Those AC flyback transformers are hard to come by. Are you interested in selling one of them?
Hi! I have sold one last week. Now there are "just" 3 pcs remaining and maybe I will need all of them. But look at highvoltageshop.at in the internet. They are selling AC transformers for around 27 euro...
jeahhh hahahaha phantom der oper.
Thanks for posting. Ready to party? If you have a minute, we just recorded an original dance song. As fellow music fans, we'd love if you would take a listen. It's on our page. Hope you like it!