Thanks Colin glad you liked it mate, so you decided to go with the GU81, I know you said you thought that was the plan.. I would maybe go for a slightly bigger primary form as a couple of people have had arcing issues with the 100mm one so maybe a 125mm would be a better option to make sure you have no issues, 100mm is very tight at this b plus and if the coil is slightly out of tune it could arc at high power,.. Steve
How have i not found your channel before now, i have been wanting to try & build a valve based coil for a long time, great video both of you, its made me go & purchase the GU81M required, i have a matched pair of MOT's & a big pile of vintage HV components ive collected up over the years, time to take the plunge i think.
@@T2D.SteveArcs Steve it was a brilliant watch, thanks for taking the time to share your knowledge with us all, its put my mind a little more at east about trying my hand with valves, for some irational reason ive allways been a bit nervy of them. its takes a lot of years & time to have that many goodies like you do & the knowledge to use them, ive been tinkering with HV for quite a few years, i come from a high power audio background so i had a good start for solid state coils, many younger folks would be horrified to see what i made out of all my old amplifiers from my big sound systems haha, i look forward to your next vid, keep up the awesome projects Luke
@@lukebowers536 that's awesome to hear Luke, after all it's my purpose for uploading my videos 😀👍, if you use Facebook I'm on there as "Steve Arcs" if you want to send me a friend request 👍👍 Steve
Would like to recreate.. russian tank caps, GU81M, diodes.. no problem. But where can I get a 150W tungsten lamp in my eco-friendly country? 😁 Kudos to Michelle, well done! She would make a great teacher, she has a clear voice and a good camera presence 👍 👍 👍
Thanks Tanner glad you liked it mate, I will be uploading more as we go along, im slowly building subscribers and getting a regular audience so moving in the right direction, Means a lot that you like my vids 😁👍👍 Steve
This was fantastic! Now I am torn whether or not to continue with the RSGCT... I really like the romance of the vacuum tube and those sword-like sparks!
I just built a GU81 coil based on your schematic and it works great ! Only 115 volts though. With a staccato circuit purchased from Eastern voltage research.
AWSOME 😎😎 115v doest make a difference as the mots still put out 2.2kv however the 60hz mains sinewave gives a period 16.6mS and 50hz give a 20mS period the ramp time is period X 0.5 so 10mS vrs 8.3mS this means you may get slightly shorter swords 🤷♂️.. Good work 😎 Steve
Hey Steve, I think the video is really great! I will definitely recreate it sometime. Be careful, your wife will soon be building better Tesla coils than you;)
Thanks mate really appreciate your feedback and support, and yeah I will definitely have to watch my back she will be beating my coils in no time to 🤣🤣🤣👍👍👍👍 Steve
I can affirm that this circuit works. Mine would have worked on the first try had I kept my HV wires short, separated and isolated and had I connected pin 5 of the GU81 to neutral or installed the SCR right away. Thanks Michelle for the inspiration and thanks Steve for all the help!
Thanks James really appreciated, im glad your build went well, and well done 👍 😎, I know this was your first Vacuum tube project so its really cool that you pulled it off and it ran straight away, I know you missed a connection due to a little confusion around the SCR but that's a minor, as for cable management and layout that's on us to an certain extent and we will be sure to talk about this more in any future build videos, its great that Shell's video inspired you I hope it does the same for others .. all the best Steve
@@T2D.SteveArcs I am really happy with it! Thanks for all the help! I definitely have the bug to build more. At some point I'll get started on the GU5A.
I know mate she did a great job🤣🤣 I know you will get yours going I have no doubt 👍👍 It was interesting running two coils at the same time from one staccato, I really wanted to know if we could re create it with different components, different diodes, tank cap, secondary, mots and top load etc Steve
Hey thanks Jimmy, really glad you liked our video and hopefully it was useful to you, we really appreciate your feedback, thanks for watching, Steve & s Shell 😁👍👍👍
Yes mate she ran it CW just before she said "right let's get the staccato wired up" 🤣 thanks for watching There are more videos of gu81 coils on my channel I'm getting 4 feet arcs now from a 1 foot secondary and still think we can get a bit more😁👍 Fantastic Soviet tubes, theres a GU39B coil on my channel aswel 13kw continuous 20kw intermittent..... Steve
@@T2D.SteveArcs Gahh, I saw that coil! That’s the biggest VTTC I’ve ever seen. I might have to pick up one of those Soviet tubes. I’ve been using some 833Cs and they are getting hot. Which diodes are working well for you? Do you have a source for quality Door knob caps? I’ve been thinking about using some 866a or 3b28 diode tubes for a rectified coil but I think that might be a bit too much filtered DC and hinder spark length.
@@jeffersondalton2023 yeah you don't want smoothed DC you want a level shifter like I use, you need the ramp and a syncronous staccato driver.... 10A10 diodes are cheap and work well... Watch all my coil videos mate theres quite a bit of info in them ... I'm using 10A10 diodes with movs on my GU39B coil and that can pull 20kw, Steve
@@jeffersondalton2023 door knob capacitors Ebay mate.. Theres better videos of GU81 coils on my channel too I'm getting over 4 feet arcs now from 1 foot secondary 4 to 1 ratio is really good but I still think I can get a bit more🤣👍
Ebay mate 😁👍doesn't have to be that exact tube to build a coil although if you do use something different while copying my design it will likely be out of tune and need a little tinkering to make perfect 👍👍 Steve
😀😂 thanks mate really appreciate you watching, i have better performance now so there will be a video of the finished coil at some point including the changes I made... Thanks Steve
Thank you Michelle. That was an excellent demonstration of your skills, and you are indeed a very good presenter. Do you get to keep the Tesla coil, or will Steve pinch it off you and tell people who haven't seen the video that he made it himself?😂
Thank you Peter, your support and kind words mean alot and No chance, that's how he got the first one! So I thought to record this build so he cant claim it! 🤣🤣 Look what happened when I taught him about xray transformers 🤣🤣 Michelle
Congratulations Michelle. Looks like "Battle of The Tesla Coils" has begun. In this corner, the challenger "Michelle". In the other corner, the old timer "Steve". Whose Tesla Coil will win? Great build and video and thanks.
Hi Barry, thank you so much for your support. I know your routing for the under dog 🤣🤣 I'm sure it's a battle I will win eventually 🤣 Take care. Michelle
Thanks mate, I will pass this to her, yes first time she built a Tesla coil 👍👍 she built other things though and she been in there with me building coils etc and of course I was there through this but she did it herself, she has a good understanding of electrolytics if not quite as interested as I am, that said I'm very she will make more videos in future given the positive feedback she has received from this video.. im very sick at the moment hence the lack of activity but hopefully I will recover and be back making content soon, thanks for watching all the best from the UK Steve and Shell 👍👍👍👍
Hi, Great build, I'm going to build that monster someday, but I have maybe half of the needed parts. I have a question, can I use as a bank cap microwave oven capacitor connected in series and stack to make up 12uF value? Or is that a bad idea? And what can happen if my cap bank will be smaller like 4uF and how long on full power without staccato this vttc can operate?
Hey guys, still waiting on my tank caps to get here. Just testing my tube out and was wondering, should there be continuity between pin 6 on the bottom and the other ear on top that isn't the anode (G3)?
Hey Steve! Thanks for all the help! Cap question: On the voltage doubler caps we're aiming for 10uf at 5KV, yes? Can we go a little higher in voltage like 5.5kv or 6kv? Will other caps work like Cornell Dubelier that are used in other tesla cap banks? I don't see why not, unless I am missing something about the behaviour of electrolytic. You did mention that's what you had on hand... and I overthink things.
The Higher voltage rating is preferable as it gives more head room mate, I'm not sure what you mean by other caps. If you can be more specific mate I can give a better answer, Cornell Dubelier make all different types of caps so if you can say which type that would be awesome and I can tell you my thoughts... Steve
Hi i have 2 questions, first of. Where the heck did u get this many 450v 330uf capacitors they are quite expensive. Secondly is this capacitor value important, does it have to be that high or is it possible to use for example 4.2kv instead of for. Im planning on building one of these, i have everything and the only thing missing. Is the Cap-bank, and to get on these values with MO-caps u need over 100
Hi thanks, you can just use two 120v MOTs mate, also I'm using a 25A variac but it doesn't need to be this big for this coil. Could even manage without a variac if you used a ballast maybe, or with a small variac and a contactor and helping hand inductor etc ... Thanks for watching glad you enjoyed the video and please take a look at my other VTTCs too😁👍👍all the best from the UK Steve and Shell 😁👍
Hi, the MMC doubler capacitor values and schematic 2 strings of x 14 330uF 450V (28 caps total) aswel as appropriate bleader/balancing resistors (82k ohms) iirc are in the video my friend ..
Hello, i don’t understand why you ve connected the two strings by their positive? Because to have 12uF with 330uF caps we have to put them in séries 330/28 makes 11,8uF
Love the video! Also question, correct me if I’m wrong but the voltage doubler part of the circuit is also a half bridge rectifier. If that’s true… is it necessary for the circuit? I’d estimate you’re getting about 4-5500v from the transformers so would it be feasible to just use a neon sign transformer that outputs 5kv? Thanks you!!!
Neon sign transformer doesn't put out enough current mate you need 1A plus to get descent output .. the voltage doubler is a half wave rectifier but it also shifts the sinewave up so its all above ground so not only do you get double the voltage you also get double the ramp time ie twice the arc propagation duration.. 10ms on 50hz and 7.5ms on 60hz apossed to half this ramp time on straight AC it makes the output much better and is needed my friend..
Hey thank you for this video, i've learned a lot from it. I'm in doubt about something, how do you tune your VTTC? is it by changing the turns in the primary like in a SGTC? because from the setup is seems a little bit harder since the cables are insulated and in that configuration.
Il make a more in depth video soon showing my 1.5Mhz coil and I will talk about impedance matching and tuning etc, thanks for watching, check out my other coils ... Steve
If you change anything then it will be out of tune and you will need to do your own tuning just remember that more secondary turns doesn't automatically mean more output, you want to keep the turns to 700t to 750t at this frequency in my opinion
Cool, I will have a look at it in the future, I thought they were same power.. I'm happy with this build I managed 42 inches from a 11 inch secondary so 4 to 1 ratio.. I want to move back onto my gu39 coil, I have had 4 feet from that coil so far but I'm sure we can get a lot more, havent really experimented with it yet... Thanks for watching Steve
@@T2D.SteveArcs for cw operation, i must sell my kidney on the black market to get big chunky gigadollar smoothing caps and also some megadollar tube with the cooling using the holy airplane turbine XDXD
Hey guys. Can't get the interrupter to work. i made a home made opto isolator with an led, a straw, some black tape and a photo transistor that triggers a 2n2222 that triggers the gate of the triac. I'm using a bt136 600e and I'm able to actrually turn the coil on with my first pulse but then it doesn't shut off. I added a corresponding LED to the output of the 2n2222 to use as an indicator to show when its turning off and on. Im using an 18650 for a battery. Any suggestions? Maybe my triac isn't the right one? once i trigger it with some pulse, it just says conducting. thanks so much
@@T2D.SteveArcs Ty for your quick reply. The shielded cable makes sense, I will try that. Also I have noticed that most ppl are using a scr as u have suggested. can you recommend me one to use? That way I know that its working for you at least lol Thank you so much man, you have been the best :)
Maybe a 200 ohm 200w variable resistor 🤷♂️ I prefer I lamp because they have a positive temperature coefficient also you can see straight away if the coil is oscillating and you Also get an idea of grid current from the brightness of the lamp.. I will try measure the cold resistance of a 100w and 150w tungsten lamp for you, you calculate the full power running resistance with ohms law as its vertually resistive ..
@@T2D.SteveArcs first thanks for your answer but im actually not that educated on elektronics it is sufficiant to understand the dangers but building a teslacoil is my ultimate project to educate myself more about this stuff i will try to find a bulp or a variable resistor . I apreciate your answer thanks again.
Yeah a few people had that problem, I suggest somwhere around 125mm mate, if the coil is even slightly out of tune it can arc to the primary form with that little clearance, 120mm to 130mm will solve the problem, sorry about that but as you can see that's what I used, what diameter secondary are you using? Steve
@@hugo0627 okay well that also gives you less clearance as the one I used was 70mm well actually 68mm .. i think its just the difference in metric and imperial maybe, or just different standard pipe sizes in Brazil? Idk, well I know now for future vids now so will be sure to allow for this 👍👍👍👍 Steve
@@GURONTV G1 and G2 tried together and G3 is tied to the cathode.. so technically it is in triode configuration but with G3 the suppressor grid tied to the cathode, you can also just tie all 3 Grids together but I prefer not to on two MOTs but if I was using 1 MOT only I would tie all the grids together... Steve
And when all 3 grids are together, G1,2,3 are more powerful together, then the triode will be more powerful, I'll try it in different ways, thanks Steve GURON
you should have made her wind her first secondary coil by hand. gain the same experience that the forbearers of the technology had to go through winding in there shop 1885 the first ac transformer was invented by Ottó Bláthy, Miksa Déri and Károly Zipernowsky. 1001,1002,....hahah. F that get the drill.
@@T2D.SteveArcsnope the drill was made for power procution in 1873, Zenobe Gramme, a Belgian inventor, invented the first commercially practical and sold it to Edison.
Nice work. We can tell that Michelle has a great teacher.
Thanks John. I have learned alot from Steven
Thanks for you support.
Michelle
Thank you both. I feel confident that I can do this now :)
That's great. Glad we have helped.
Take care
Michelle
I love the longer format, great job and i hope for more! :D also you make a really great team ;)
Thanks mate. Glad you enjoyed it.
Your support is appreciated
Michelle
This was a good watch. Good way of showing anyone can do it.
also super entertaining. T2d wife would be nice to see more often lol.
Thanks mate.
T2d wife lol
Michelle
Thanks mate appreciate your support
Thanks for watching
Steve
Fantastic and great to see your good lady tackle the project. Will be following this for my build, Colin
Thanks Colin glad you liked it mate, so you decided to go with the GU81, I know you said you thought that was the plan.. I would maybe go for a slightly bigger primary form as a couple of people have had arcing issues with the 100mm one so maybe a 125mm would be a better option to make sure you have no issues, 100mm is very tight at this b plus and if the coil is slightly out of tune it could arc at high power,..
Steve
Excellent build, very instructional and easy to follow. Will have to revisit to get ideas.
Thanks for your kind words and support.
Michelle
Brilliant Shell ! Even better watching the second time 'round ! I can't believe it was two years ago.
best coil instruct eva !!!! love your lab equipment !!
Thank you sir 👍👍
Very impressive results for such a small Tesla coil. Thanks for the detailed description.
Glad you liked it mate 👍
I need to up my game, I think your wife can solder better than me!
Superb stuff, impressive output!
Thanks mate 👍 really appreciated and thank you for watching..
Steve
How have i not found your channel before now,
i have been wanting to try & build a valve based coil for a long time, great video both of you, its made me go & purchase the GU81M required, i have a matched pair of MOT's & a big pile of vintage HV components ive collected up over the years, time to take the plunge i think.
Great stuff glad you like my content, theres loads of hv madness and i will be uploading again soon...
Thanks for watching
Steve
@@T2D.SteveArcs
Steve it was a brilliant watch, thanks for taking the time to share your knowledge with us all, its put my mind a little more at east about trying my hand with valves,
for some irational reason ive allways been a bit nervy of them.
its takes a lot of years & time to have that many goodies like you do & the knowledge to use them, ive been tinkering with HV for quite a few years, i come from a high power audio background so i had a good start for solid state coils, many younger folks would be horrified to see what i made out of all my old amplifiers from my big sound systems haha,
i look forward to your next vid, keep up the awesome projects
Luke
@@lukebowers536 that's awesome to hear Luke, after all it's my purpose for uploading my videos 😀👍, if you use Facebook I'm on there as "Steve Arcs" if you want to send me a friend request 👍👍
Steve
@@T2D.SteveArcs just found you on there, you will see me frequently doing terrible things with high voltage & huge lasers haha
@@lukebowers536 have you looked at my xray transformer videos?🤣
Would like to recreate.. russian tank caps, GU81M, diodes.. no problem. But where can I get a 150W tungsten lamp in my eco-friendly country? 😁
Kudos to Michelle, well done! She would make a great teacher, she has a clear voice and a good camera presence 👍 👍 👍
You have to recreate it! :D
@@Teslaundmehr I know, I owe you and Steve one 🤣
@@Teslaundmehr lol I'm on his case too🤣🤣👍👍👍
Hey thanks mate glad you liked it👍👍 ah a tungsten lamp in Gerecomany 🤔 errr a museum maybe? 🤣🤣 CE yay 🤣🤣🤣
Steve
@@dieckslyou have the components, come on you know you want to🤣🤣🤣🤣
keep up the good work, cheers to both of you.
Thanks mate really appreciate your support
Steve n Shell👍👍🤣
Awesome video mate! I love your videos!
Thanks Tanner glad you liked it mate, I will be uploading more as we go along, im slowly building subscribers and getting a regular audience so moving in the right direction,
Means a lot that you like my vids 😁👍👍
Steve
This was fantastic! Now I am torn whether or not to continue with the RSGCT... I really like the romance of the vacuum tube and those sword-like sparks!
Vacuum tubes are awesome check out my other Vacuum tube Tesla coil videos and shorts..
Thanks for watching
Steve
Nice, awesome output 👍👍👍👍😎
Thanks mate glad you liked it, I appreciate your support
Thanks Steve
Thank you! I did it, finally. Its working and I coudln't be happier. Thanks so much both of you :)
Excellent mate well done 👍👍
Steve
@@T2D.SteveArcs Couldn'ta done it without ya :)
@@JoshHopkinsYT 😊😁👍👍
Well explained. Keep up the good work bro!
Thanks buddy 👍😁 check out my shorts too. There is some awesome Vttc vids etc.. thanks for watching
Steve
i love your videos keep it up!
Thanks mate 👍
I just built a GU81 coil based on your schematic and it works great ! Only 115 volts though. With a staccato circuit purchased from Eastern voltage research.
AWSOME 😎😎 115v doest make a difference as the mots still put out 2.2kv however the 60hz mains sinewave gives a period 16.6mS and 50hz give a 20mS period the ramp time is period X 0.5 so 10mS vrs 8.3mS this means you may get slightly shorter swords 🤷♂️..
Good work 😎
Steve
Really great content!
Thanks so much and thanks for watching, really appreciated
Michelle
Hey Steve, I think the video is really great!
I will definitely recreate it sometime.
Be careful, your wife will soon be building better Tesla coils than you;)
Thanks mate really appreciate your feedback and support, and yeah I will definitely have to watch my back she will be beating my coils in no time to 🤣🤣🤣👍👍👍👍
Steve
hey she is good at announcing, Pretty awesome build too!
Thanks mate glad you liked it, really appreciate your support
Steve
Thank you for your kind words. It's really encouraging
Michelle
Outstanding A+ love it
Thanks for your support.
Michelle
Nice work! I bet you and her have absolutely no trouble keeping the spark alive in your relationship :P
🤣🤣 Thanks mate really appreciate and value your feedback,
Thanks for watching mate
Steve
I can affirm that this circuit works. Mine would have worked on the first try had I kept my HV wires short, separated and isolated and had I connected pin 5 of the GU81 to neutral or installed the SCR right away. Thanks Michelle for the inspiration and thanks Steve for all the help!
Thanks James really appreciated, im glad your build went well, and well done 👍 😎, I know this was your first Vacuum tube project so its really cool that you pulled it off and it ran straight away, I know you missed a connection due to a little confusion around the SCR but that's a minor, as for cable management and layout that's on us to an certain extent and we will be sure to talk about this more in any future build videos, its great that Shell's video inspired you I hope it does the same for others .. all the best
Steve
@@T2D.SteveArcs I am really happy with it! Thanks for all the help! I definitely have the bug to build more. At some point I'll get started on the GU5A.
@@jameshicks7125 AWESOME and your welcome mate 👍👍👍
Excellent, think you might be out your job. :-) I'm still fighting mine, but i'm not good at listing and have to do things my way. :-)
I know mate she did a great job🤣🤣 I know you will get yours going I have no doubt 👍👍
It was interesting running two coils at the same time from one staccato,
I really wanted to know if we could re create it with different components, different diodes, tank cap, secondary, mots and top load etc
Steve
Great video thank you
Hey thanks Jimmy, really glad you liked our video and hopefully it was useful to you, we really appreciate your feedback, thanks for watching,
Steve & s Shell 😁👍👍👍
Nice! Two MOTs for gu-81M is a bit too much, but it will work with staccato.
Thanks mate, glad you liked it thanks for watching really appreciated 👍👍😁
Steve
GOOD WORK SHELLY.
Thanks mate 👍👍👍👍😁
Shell
Double Mot?! That cap bank is huge. Impressive design💯!.
Yes mate she ran it CW just before she said "right let's get the staccato wired up" 🤣 thanks for watching
There are more videos of gu81 coils on my channel
I'm getting 4 feet arcs now from a 1 foot secondary and still think we can get a bit more😁👍
Fantastic Soviet tubes, theres a GU39B coil on my channel aswel 13kw continuous 20kw intermittent.....
Steve
@@T2D.SteveArcs Gahh, I saw that coil! That’s the biggest VTTC I’ve ever seen. I might have to pick up one of those Soviet tubes. I’ve been using some 833Cs and they are getting hot.
Which diodes are working well for you?
Do you have a source for quality Door knob caps?
I’ve been thinking about using some 866a or 3b28 diode tubes for a rectified coil but I think that might be a bit too much filtered DC and hinder spark length.
@@jeffersondalton2023 yeah you don't want smoothed DC you want a level shifter like I use, you need the ramp and a syncronous staccato driver....
10A10 diodes are cheap and work well...
Watch all my coil videos mate theres quite a bit of info in them ...
I'm using 10A10 diodes with movs on my GU39B coil and that can pull 20kw,
Steve
@@jeffersondalton2023 door knob capacitors Ebay mate..
Theres better videos of GU81 coils on my channel too
I'm getting over 4 feet arcs now from 1 foot secondary 4 to 1 ratio is really good but I still think I can get a bit more🤣👍
Well man, I dont have any idea where to get some of those fun toys. I will look around . Maybe the other Steve might be able help.
Ebay mate 😁👍doesn't have to be that exact tube to build a coil although if you do use something different while copying my design it will likely be out of tune and need a little tinkering to make perfect 👍👍
Steve
Very nice! I want to make it too.
😀😂 thanks mate really appreciate you watching, i have better performance now so there will be a video of the finished coil at some point including the changes I made...
Thanks Steve
amazing!
Thanks mate 😁👍 actually not the final version so needs a follow up video 🤦🏻♂️😅
Thanks for watching
Steve
I agree, this could be a segment or something.
Maybe 🤣👍
Thanks for watching
Steve
Thank you Michelle. That was an excellent demonstration of your skills, and you are indeed a very good presenter. Do you get to keep the Tesla coil, or will Steve pinch it off you and tell people who haven't seen the video that he made it himself?😂
Thank you Peter, your support and kind words mean alot and
No chance, that's how he got the first one! So I thought to record this build so he cant claim it! 🤣🤣
Look what happened when I taught him about xray transformers 🤣🤣
Michelle
@@T2D.SteveArcs 😂😂😂
@@peterjameson321 👍😁
Hey steve ive got 50-60cm arcs when i manualy pulse it and when i connected g3 to g2 and g1 ive got even more output 😁
Awsome man
Congratulations Michelle. Looks like "Battle of The Tesla Coils" has begun. In this corner, the challenger "Michelle". In the other corner, the old timer "Steve". Whose Tesla Coil will win?
Great build and video and thanks.
Thanks mate really appreciate your feedback and support...
Thanks
Steve
Hi Barry, thank you so much for your support. I know your routing for the under dog 🤣🤣
I'm sure it's a battle I will win eventually 🤣
Take care.
Michelle
@@T2D.SteveArcs
Cue the "Rocky" theme...
Wife building a TC? That's pretty close to peak reality.
😂😂🤷♂️
Nice,🔥👍
Thanks mate
Steve
Hello again I hope you're doing better. I'd like to know if she used a 0.4 mm diameter or section area wire for the secondary. Thanks.
you`re wife is badass bro, is this her first build? Awesome results
Thanks mate, I will pass this to her, yes first time she built a Tesla coil 👍👍 she built other things though and she been in there with me building coils etc and of course I was there through this but she did it herself, she has a good understanding of electrolytics if not quite as interested as I am, that said I'm very she will make more videos in future given the positive feedback she has received from this video.. im very sick at the moment hence the lack of activity but hopefully I will recover and be back making content soon, thanks for watching all the best from the UK
Steve and Shell 👍👍👍👍
nice.
Thanks mate. Glad you enjoyed it.
Steve
nice video
Thanks mate
Steve
nice video, 👍👍
Thanks Will glad you liked it and thanks for watching
Steve
Ótima bobina 😁
Thanks mate 👍👍
Hi, Great build, I'm going to build that monster someday, but I have maybe half of the needed parts. I have a question, can I use as a bank cap microwave oven capacitor connected in series and stack to make up 12uF value?
Or is that a bad idea? And what can happen if my cap bank will be smaller like 4uF and how long on full power without staccato this vttc can operate?
Nice video. What's that neon tube next to the coil on the desk at 17:06?
Hey guys, still waiting on my tank caps to get here. Just testing my tube out and was wondering, should there be continuity between pin 6 on the bottom and the other ear on top that isn't the anode (G3)?
Yes mate they are connected in the tube
Awesome video, I'm planning on building my own coil too :)
Does the tube get overpowered and heat up a lot or is it fine to run it continuously?
Hey Steve! Thanks for all the help! Cap question: On the voltage doubler caps we're aiming for 10uf at 5KV, yes? Can we go a little higher in voltage like 5.5kv or 6kv? Will other caps work like Cornell Dubelier that are used in other tesla cap banks? I don't see why not, unless I am missing something about the behaviour of electrolytic. You did mention that's what you had on hand... and I overthink things.
The Higher voltage rating is preferable as it gives more head room mate, I'm not sure what you mean by other caps. If you can be more specific mate I can give a better answer, Cornell Dubelier make all different types of caps so if you can say which type that would be awesome and I can tell you my thoughts...
Steve
Can u substitute the Electrolytic caps with microwave oven capacitors?
Yes
Hi i have 2 questions, first of. Where the heck did u get this many 450v 330uf capacitors they are quite expensive. Secondly is this capacitor value important, does it have to be that high or is it possible to use for example 4.2kv instead of for. Im planning on building one of these, i have everything and the only thing missing. Is the Cap-bank, and to get on these values with MO-caps u need over 100
I just had those caps on hand.. you can use a few microwave caps or whatever
Hi Steve, is the ground of the secondary the same ground as the one you connected the other components?
Yes mate its grounded to neutral
Very nice 👍. The tubes are quite hard to find 😐.
Depends where you live mate theres loads on Ebay etc from the eastern bloc...
Glad you liked it thanks for your support
Steve
@@T2D.SteveArcs okay🤔. Well are the capacitors ...(the tank caps )also available on ebay?
@@spandandutta2485 yes mate type door knob capacitor... same thing loads of Soviet stuff out there....
Steve
Good job I would love to build one But I live in Canada we don't have 240 Volts only 115 volts and 220 volts plus what size variac are you using?
Hi thanks, you can just use two 120v MOTs mate, also I'm using a 25A variac but it doesn't need to be this big for this coil. Could even manage without a variac if you used a ballast maybe, or with a small variac and a contactor and helping hand inductor etc ...
Thanks for watching glad you enjoyed the video and please take a look at my other VTTCs too😁👍👍all the best from the UK
Steve and Shell 😁👍
Hi m8... Very nice what you and your wife did!
How is it going with the X-ray transformer driver? 🙃
Thanks mate glad you liked it.. I haven't started on bigger xrt driver yet,
Thanks for watching
Steve
Hello could you tell me with capacitor you've used for the electrolytic mmc?Thank you both😁
Hi, the MMC doubler capacitor values and schematic 2 strings of x 14 330uF 450V (28 caps total) aswel as appropriate bleader/balancing resistors (82k ohms) iirc are in the video my friend ..
Hello, i don’t understand why you ve connected the two strings by their positive? Because to have 12uF with 330uF caps we have to put them in séries 330/28 makes 11,8uF
Because they are polarized caps and see some AC so its safer to make an AC capacitor.. 👍👍 thanks for watching my channel..
Steve
Love the video! Also question, correct me if I’m wrong but the voltage doubler part of the circuit is also a half bridge rectifier. If that’s true… is it necessary for the circuit? I’d estimate you’re getting about 4-5500v from the transformers so would it be feasible to just use a neon sign transformer that outputs 5kv? Thanks you!!!
Neon sign transformer doesn't put out enough current mate you need 1A plus to get descent output .. the voltage doubler is a half wave rectifier but it also shifts the sinewave up so its all above ground so not only do you get double the voltage you also get double the ramp time ie twice the arc propagation duration.. 10ms on 50hz and 7.5ms on 60hz apossed to half this ramp time on straight AC it makes the output much better and is needed my friend..
@@T2D.SteveArcs You are the the best! Thank you!
@@ChaseQuist-bv2du no worries mate 👍👍
Hey thank you for this video, i've learned a lot from it. I'm in doubt about something, how do you tune your VTTC? is it by changing the turns in the primary like in a SGTC? because from the setup is seems a little bit harder since the cables are insulated and in that configuration.
Il make a more in depth video soon showing my 1.5Mhz coil and I will talk about impedance matching and tuning etc, thanks for watching, check out my other coils ...
Steve
@@T2D.SteveArcs Okay thank you for answering, i'll be tuned for it, Cheers from Brazil
@@hugo0627 thanks Hugo, as soon as I'm well enough I will be posting videos on a regular basis again, thanks for watching...
Steve
I don 't have a 0.4 mm wire , can I use 0.12 ? I will be able to wind at 550 kHz
If you change anything then it will be out of tune and you will need to do your own tuning just remember that more secondary turns doesn't automatically mean more output, you want to keep the turns to 700t to 750t at this frequency in my opinion
This is amazing, I'll definitely build this one. Is the input voltage 120v or 240v?
UK 240v but as you can see in the video we use a variac so dont put full voltage on it probably 200v max on the mot primarys👍👍
@@T2D.SteveArcs Alright thanks, also what current and voltage is your SCR rated for?
Thanks man and Either 240v or 120v depends on the Mots you use, if you're in the US you will use 120v Mots..
Steve
good enough for gu-81m. try gu-81, it's more powerful
Cool, I will have a look at it in the future, I thought they were same power..
I'm happy with this build I managed 42 inches from a 11 inch secondary so 4 to 1 ratio..
I want to move back onto my gu39 coil, I have had 4 feet from that coil so far but I'm sure we can get a lot more, havent really experimented with it yet...
Thanks for watching
Steve
@@T2D.SteveArcs gu-81m is 350 watts, but gu-81 is 450w and the anode is thicker and bigger
@@dopedeala666 GU81m is 750w output and 450w anode dissipation falling to 650w at higher frequency
Steve
Yes mate you can connect cathode to ground for continuous wave operation
@@T2D.SteveArcs for cw operation, i must sell my kidney on the black market to get big chunky gigadollar smoothing caps and also some megadollar tube with the cooling using the holy airplane turbine XDXD
Hey, how many amps can your variac supply?and do you know how much does the coil draw? sorry for commenting too much 😁
The coil draws between 3A and 12A 240v depending on the bps
Which thyristor did you use to interrupt the cathode ?
1200v 10A because that's what I had on hand
@@T2D.SteveArcs 4 kV power After all, 4 kV of power goes to the cathode, how can it withstand?
@@GURONTV I'm not going into an explanation here mate but 1200v is fine, trust me 😅
Can you build one without using a tube?
Yes mate you can build a solid state coil👍👍
Steve
Hey guys. Can't get the interrupter to work. i made a home made opto isolator with an led, a straw, some black tape and a photo transistor that triggers a 2n2222 that triggers the gate of the triac. I'm using a bt136 600e and I'm able to actrually turn the coil on with my first pulse but then it doesn't shut off. I added a corresponding LED to the output of the 2n2222 to use as an indicator to show when its turning off and on. Im using an 18650 for a battery. Any suggestions? Maybe my triac isn't the right one? once i trigger it with some pulse, it just says conducting. thanks so much
Try a shielded cable, better to use a scr
@@T2D.SteveArcs Ty for your quick reply. The shielded cable makes sense, I will try that. Also I have noticed that most ppl are using a scr as u have suggested. can you recommend me one to use? That way I know that its working for you at least lol Thank you so much man, you have been the best
:)
@@JoshHopkinsYT I will look at what I'm using tomorrow for you mate, if I forget remind me👍
@@T2D.SteveArcs Thanks so much! I really appreciate you :) ⚡
@@JoshHopkinsYT no worries mate 👍👍
Well done
Thanks so much 👍👍thanks for really appreciated
Shell😁👍
Maibie in year 2058 i can recreate this when il get all materials🤣🤣🤣😂
Lol I'm sure you will get the materials sooner than that🤣🤣
Thanks for watching mate .
Steve
Can i replace the lightbulp with something i cant buy them in my country/cant find them
Maybe a 200 ohm 200w variable resistor 🤷♂️ I prefer I lamp because they have a positive temperature coefficient also you can see straight away if the coil is oscillating and you Also get an idea of grid current from the brightness of the lamp.. I will try measure the cold resistance of a 100w and 150w tungsten lamp for you, you calculate the full power running resistance with ohms law as its vertually resistive ..
@@T2D.SteveArcs first thanks for your answer but im actually not that educated on elektronics it is sufficiant to understand the dangers but building a teslacoil is my ultimate project to educate myself more about this stuff i will try to find a bulp or a variable resistor . I apreciate your answer thanks again.
@@tempusfugit4062 no problem 👍
@@T2D.SteveArcs would a100w and a 50or60w bulp in series work too?
@@tempusfugit4062 absolutely 👍that want to be in parallel though not series buddy 👍👍
Steve
I've built mine, but my secondary arced to primary 🤣🤣my form was only 100mm in diameter, i think i need a bigger one
Yeah a few people had that problem, I suggest somwhere around 125mm mate, if the coil is even slightly out of tune it can arc to the primary form with that little clearance, 120mm to 130mm will solve the problem, sorry about that but as you can see that's what I used, what diameter secondary are you using?
Steve
@@T2D.SteveArcs Oh i see, my secondary is 3'' or 75mm in diameter
@@hugo0627 okay well that also gives you less clearance as the one I used was 70mm well actually 68mm .. i think its just the difference in metric and imperial maybe, or just different standard pipe sizes in Brazil? Idk, well I know now for future vids now so will be sure to allow for this 👍👍👍👍
Steve
What interupter do u use?
Mains syncronous dual 555. 1200v SCR.
@@T2D.SteveArcs thx
vocês são tecnico em eletrotecnico ou eletricistas
Eletrical Engineer
Hi
Hey mate, good to see you here. 😎👍..
Steve
Lamp No switch in triod ?
It will switch in triode mate, but because I'm driving it at such high voltage it is better to run with the suppressor tied to the cathode 👍👍👍
@@T2D.SteveArcs I mean, your lamp is not triode, but pentode, the grids are not all together, one grid goes to the cap
@@GURONTV G1 and G2 tried together and G3 is tied to the cathode.. so technically it is in triode configuration but with G3 the suppressor grid tied to the cathode, you can also just tie all 3 Grids together but I prefer not to on two MOTs but if I was using 1 MOT only I would tie all the grids together...
Steve
And when all 3 grids are together, G1,2,3 are more powerful together, then the triode will be more powerful, I'll try it in different ways, thanks Steve
GURON
@@GURONTV yes if you are using only 1 MOT put all all 3 grids tied together but with two MOTs it is better to tie suppressor to cathode
Steve
Hello
Hi 😁
Thanks for watching
Steve
is 75mm diameter pipe ok? because in Germany there is only 75mm
Yes mate should be fine👍😁
Steve
@@T2D.SteveArcs ok thanks😄
@@motness no problem 😁👍
@@T2D.SteveArcs I just assembled the tesla coil and I only get about 2-3mm arcs, do you know what the error could be?
I think it will be fine mate 👍👍
Hello,nice Video!
Can you send me the schematics via Mail?
Greetings from Germany!
Hey thanks for watching man 👍err I don't really do emails but if you want to talk to me directly I'm on Facebook as Steve Arcs👍👍
Steve
you should have made her wind her first secondary coil by hand. gain the same experience that the forbearers of the technology had to go through winding in there shop 1885 the first ac transformer was invented by Ottó Bláthy, Miksa Déri and Károly Zipernowsky. 1001,1002,....hahah. F that get the drill.
It's one of the reason a drill was invented wasnt it?
🤣🤣
Steve
@@T2D.SteveArcsnope the drill was made for power procution in 1873, Zenobe Gramme, a Belgian inventor, invented the first commercially practical and sold it to Edison.
@@numatechprototypes222 awesome
Can u touch those arcs?
At low power yes, at high power you will get rf burns
Дайте схему прерывателя
Circuit breakers built into my variac mate👍👍👍 thanks for watching
Steve
@@T2D.SteveArcs He asked for an interrupter circuit
@@manreaper1238 mains syncronous dual 555 staccato (Steve Ward) design as far as I know 👍