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Anyone capable of metal spinning?

Things

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More specifically, aluminium? I'm looking to get a few small tesla coil toroids made up, they seem reallllyyy difficult to come by :(

If you haven't seen them before:



Would be looking at something roughly 6" in diameter.

Lemme know :)
 



Speedy78

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I have seen some on ebay that are decent price. Or checking out mazing1.com under the hv section they have some tesla stuff.
 

Things

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I have seen some on ebay that are decent price. Or checking out mazing1.com under the hv section they have some tesla stuff.

I've seen the ones on amazing1 and eBay, however I'm looking at making up some kits, and those toroids are 3/4 of the cost of all the other parts combined :(
 

Sigurthr

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John Freau (I think he went by "Futuret" on the TCML) is still the main if not only manufacturer of readily available spun toroids. Last I saw he was the only eBay seller selling the 4" and 6" major dia. toroids.

Yup, just checked and I saved his site: Sparks and Arcs !!!!

He's still reachable on the TCML last I checked.

Do tell more of your kits though, hehe!
 

Things

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Do tell more of your kits though, hehe!

Working on a DRSSTC kit that would be the whole lot, all components, PCB, toroid, secondary/primary and enclosure, similar to one I've had previously:

 

Things

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Most of the design n stuff is done, kinda just working on sourcing hardware parts for them. Unfortunately all the parts are rather expensive, so I'm not sure I'll be able to handle the initial investment of making a few up. Crowdfunding is a possibility, but I don't want to have myself by the neck if I can't meet deadlines etc.
 

Things

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Well, so far the electronic components (not including the toroid, acrylic for the case etc) are around $100 raw cost. By the time all the hardware is added they'll probably be approaching the $180 mark or so. That's $1800 initial investment if I wanted to make even 10 of them up :(
 

Speedy78

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180 isn't a bad price for a coil. You would have to do a pre sale or something. I'm sure there's a few people on here that would go for it.
 

Things

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$180 would be the raw parts cost, but like I said it's an extremely rough estimate :) I'm not really a fan of pre-sales, in my situation with uni at least. I dunno ...

Tuned right the original coil was capable of ~40cm discharges:

 
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Speedy78

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Nice! I'd definitely be interested in one if you can work it out.
 

ARG

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Keep me updated, depending on how busy I am at school I will pick one up :)
 

Sigurthr

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I'm curious about the details of the drive and inverter, don't have to post it out in the open though, can PM me if ya want.

I hear ya about the startup cost though, it's rough!
 

Things

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It's secondary feedback driven, just using a simple 74HC14, into some gate drivers, usual gate drive transformer, then a pair of IGBTs. The tank consists of 2 2200uF 200V caps in series, and are charged via a small stepup transformer for current limiting/safety. As such the coil runs on 12VAC input and has low BPS rates, but decent streamers :)
 
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