Vacuum Tube Tesla Coil with the GU81M
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- เผยแพร่เมื่อ 2 ม.ค. 2025
- Hey🙂
Today i want to show you my newest build, where i try to achieve to build a VTTC that can run save for a longer time.
As always have fun and be save🙌⚡️⚡️⚡️⚡️
#teslacoil
#electronics
#highvoltage
Thanks man
She's a beauty!
@@VariacManiac Thanks!😇
Holy
Those doorkbob capaciors are rated for decoupling they are known to drift and they have higher ESL.
You should get some of those soviet disc capaciors
@@janno288 oh ok i didnt know that!
they also not really precise at their capacitance.. this 0.6nF are actually 6.7nF
But at the Shop where i got them, they claimed them as pulse capacitors.
They also work great..
But yeah when i find some of the soviet ones, i will try them🙂
Ye!!!
Awesome build - I think you are trying to vet to a max spark height like a QCW circuit - think you are at a good point already
@Jonodrew1286
Thanks!😊
Yes i want these thick and warm sounding sword like arcs😁 thats actually really sketchy to maintain these arcs and also driving the tube to its limit output Power.
Now i added a second tube, and these arcs are almost not possible. I think this requires really precise tuning.
@I would try altering the top load - I noticed that VTTC’s use smaller top loads -Where as SSTC you calculate pi x diameter x length for area - skin effect and make a toroid of similar dimension - but no necessarily with a vacuum tube set up - also out put electrode length - which makes a difference too
@Jonodrew1286 yes i know that. I have some different toploads here..also one where i work with aluminium Discs, that i can variyng by using more or less Discs and disc diameters🙂 yes the breakout does also make a difference, but i only have 3 ones. And 2 are used in a big and a small topload already
@@marvswelt2587 so many considerations but I think you want bigger output you are hitting some good parameters now you either use a heftier tube 20 -26 amps @ 4-5KV or stick with what you have - a fine line between output and reliability especially CW operation 🤔
@Jonodrew1286 yes the line is really fine and takes now more than 100 hours tuning and trying different primarys and feedbacks.
I added now one gu81m in parallel to be able to push more current.. it works well and i have without much tuning 10cm more output.
But everything now has to get rebuild and fine tuned now, to get the circuit back to this line again😅🙉
WOW!
@@janno288 thanks😇
Sieht gut aus :D
Ich hinterlass mal ein Kommentar, ein Like und ein Abo :D
@@HypnosisDr hehe, dankeschön!😇
You might consider getting a variac 3kVA ones are suitable for such coils
The Inrush current pops youe house breaker
@@janno288 yep i know.
@@marvswelt2587 You could try powering the MOTs through a light bulb then bypassing it or do the same witb your choke
For some reason the people who understand these circuits the most are the people who get the least Performance out of them.
xD
I watched this video several times now
Thats because theory is theory and not practice.
When you only can work with theory on "dynamic" stuff, than you dont know what youre doing.
Theory and practice is important! But only one of this, dont get you far.
When you only know theory, you just can do things that are achieved by other people.. when you only learn by try and error, you have a hard time. And/or end up smoke you self with stuff like that..
Im an electrician. And know a little theory, also how to stay alive with experimenting with stuff like this.
But everything Else are hundreds of hours of work.
I would really be interested, could you attach a volt and ampmeter to the output of your MOT power supply?
I want to see how much power is actually going into the resonant tank.
@@janno288 i would love to do that too, but im a bit scared of killing my Voltmeter with RF or nasty kickback's
I can mesure the powerdraw of the MOT's on their input.
I know they are draw about 2,6 amps without load.
@@marvswelt2587 Well thats what analog ampmeters and voltmeters are for.
Get a 10V full deflection meter and add resistors in seried to make it 10kV full deflection.
And get yourself a analog dc ampmeter 0-1A should be sufficient
multimeters will not work for rf currents, they go crazy, they dont like it.
almost like a quasi continuous wave tesla coil
Haha, that would be absolute nuts, to do that with tubes😄
Ich würde auch sehr gerne eine tesla spule bauen, kannst du eine quelle zu einer anleitung empfehlen
@@blocksers6948 über Google wirst du einige grund Informationen dazu finden können.
Grundsätzlich ist jedoch ein sehr ausführliches Verständnis über die Elektrotechnik und Sicherheitsmaßnahmen vorausgesetzt!
Wenn das alles vorausgesetzt ist, steht dir dafür nichts im weg🙂 evtl. Werde ich über die Zeit über einige Videos ein paar grundlegende Dinge preisgeben. Stay save and have fun🙃
@blocksers6948 eine vollständige und präzise Bauanleitung gibt es nicht! Bzw. Wird nicht/nicht gut funktionieren.
Auf dem youtubekanal "tested to destruction" kannst du ein Video finden in dem die Frau von Steve arcs eine teslaspule nach seinem grundschaltplan nachbaut und auf anhieb einigermaßen funktioniert.
Wenn du dort jedoch nicht alles absolut exakt einhälst wird sie kaum oder nicht funktionieren.
Sogar lufttemperatur u. Luftfeuchtigkeit verändert die Performance merklich.
Von daher ist es unabdingbar, die eigene schaltung gut zu durchblicken und zu kennen, um mit sehr eigenwilligen und dynamischen zicken und Tücken der VTTC fertig werden zu können🙂
50cm out of basically votlage from 1 MOT, why does it always happen to others but why not me haha
@@janno288 to be honest, you are not alone with that.
VTTC's can be super sketchy! I had quite many problems to solve too.. i wound about 8 primarys in total, easy 25 feedback windings, maaaaany many different feedback cap/resistor combinations.
Tried 3 different secondarys etc...
I think i worked over 100 hours straight only on tuning and different combinations.
I can try to do a video about what i learned out of that project when you want🙂
@marvswelt2587 Please do!
@@janno288 ok i will do that soon😊
@@janno288 i measured now the input current of the MOT's and they draw 4,2 amps at full Power.. so its about 966 Watts 😊
Thats actually really efficient !!
@@marvswelt2587 you need to measure the Output current not the input current!
When will you audio modualte it hahahaha
@@janno288 i take my time on that all, to learn as much Details as possible 🙂 i have a second gu81m...
With that i will try different things...and for Sure Audio Modulation too🙂