How to build a dual MOT Tesla Coil

How to build a Tesla Coil based on two microwave oven transformers and an asynchronous rotary spark gap.

Song credit:

Published by edition drizzly songs / universal music publishing.

coil info:

2 mots,
Asynchronous rotary spark gap ( wood router ) 12 electrodes on wooden disc.
Primary: 5 and a halve turns used. 10 turns total, 6mm tubing.
Secondary: 7cm x 38cm (adjustable height) about 1100 turns.
Toroid: 10cm x 38cm (adjustable height)

[chrislj]

I haven't built one of these in about 20 years. Last one I built was based off a 150ma 8kv transformer, forced air static gap, a home made acrylic/flashing/mineral oil cap. It was loud but made some very nice violet arcs. Best arc distance I managed was just shy of about 4 feet.

[deeds]

I'm in love with that primary tap, so neat. ;)

[djchesneck]

Very nice! Im building my own one, but a lit smaller. If i finish it ill share a video here :)

[frofro]

Only 4kv? Nicely done. Those must give a nice bit of power to the coil. Probably about 500ma, yeah? From what I've read they can handle some abuse. That's about a 2kw coil. Planning on a similar power supply. But I'm thinking about submerging the transformers in mineral oil

[mandalisj]

Interesting design with the rotary spark gap

[solarsynapse]

Very nice! Looks like your primary is wound counterclockwise from the inside out and the secondary is wound clockwise. Is that correct?

[bencawter]

That is amazing thank you for the inspiration I am building my own dual MOT Tesla coil and love it when I come across vids like this! Any advice on where I can buy my MMC bank?

[TheHoliday]

Very nice! Can you tell what kind of ballast you using? Or where to get that transformer? Tnx

[n]

That's a brilliant coil, mate! I'm just judging from the video but the discharge is pretty thick which implies a fairly powerful discharge. I noticed you had a bank of capacitors in the primary circuit. Were you ever in a position to replace this bank with (say) an equivalent single capacitance which might have a lower ESR?
Whatever you've done it's worked well! Thanks awfully for taking the time to share this video clip.

[kruimels]

What kind of ballast do you use for the microwave transformers?

[ungnhanvaoprofilecuatoi]

hi, i have some question, is the strike rail a circle connected to ground to prevent sparking to the secondary, and why does it need to be a open circle

[jmpt]

Hey Job, really nice. I ask if you can enfatize on the making?

[superkoksu]

did you make any calculation before building this masterpiece ?

[kristerpanzerfaust]

impressive, could you tell me what purpose the chokes serve,
isn't the ballast for the same reason ?

[benjaspersfaijer]

hey Job, geweldig goed gedaan, prachtig apparaat !!

[kruimels]

Why an adjustable primary wire? why not the wires at the end and at the start on the primary?? I wanna make one too.

[maxitechnic]

Awesome !! Using a voltage doubler after the MOTs ? 

[platinumscience]

I have an urgent question concerning my coil. The resonant cap size for the coil is .01uf while the resonant cap size for the dual mots is .6uf, how do I get around this. And how did you figure out what to do??

[notny]

what gauge wire is used for the secondary coil and why doesn't it get burnt up when it is putting out those awesome freaking streamers?

[daveandrews]

Could I get the schematics please.Thankyou.