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Can I make a tesla coil with a feedback? Answered

Is it possible to make a tesla coil with a feedback on it? Theoretically, that should allow me to power it with a driver for a flyback transformer.

Oh, and if that won't work, where can I get an old flyback transformer from, OTHER than an old TV?

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steveastrouk

Best Answer 8 years ago

I think you're misunderstanding the way the tesla works - it is a HV transformer, sure, but it RESONANTly coupled, and you won't force the resonance if you couple directly with a flyback transformer.

There is nothing extremely magical about a flyback transformer, you could wind one yourself if you made a winder out of meccanno or something, but buying one is the most cost effective way of getting one, or getting a scrapper from something like an old TV. Why do you not want one from a TV ? 

Steve

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Shagglepuffsteveastrouk

Answer 8 years ago

Wait, I could make a flyback? Cool. But do they have to be wound around a ferrite loopy core?

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steveastroukShagglepuff

Answer 8 years ago

A flyback transformer is nothing terribly special, but yes, you DO need a ferrite core - but you can buy them

Steve

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Shagglepuffsteveastrouk

Answer 8 years ago

Most flybacks that I've seen use a ferrite ring. Can I just use an ordinary ferrite rod?

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steveastroukShagglepuff

Answer 8 years ago

These are the cores I've seen and used.

http://www.ferroxcube.com/prod/assets/urcores.pdf

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steveastroukShagglepuff

Answer 8 years ago

I'll try and write an instructable on winding one some time. There's some maths involved in making a good job, to do with supply voltage,  primary inductance and saturation flux density. 

Steve

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Re-design

8 years ago

Here's an answer and a circuit that you can use feedback in.

http://tacashi.tripod.com/elctrncs/ssstc/ssstc.htm

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steveastroukRe-design

Answer 8 years ago

THATs a flyback PSU alright, but not by any means a "Tesla coil"

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Re-design

8 years ago

The only place flyback trans. is used is in a TV or crt type monitor.  Radio receivers and transmitters, oscilloscopes just use HV transformers that don't come near being a flyback trans.  I've taken apart a lot of different electronic equipment and don't remember ever seeing one anywhere else.

There might be one used in those plasma globes, but it's likely to be very low power.

Flybacks are available on the net sometimes for less than $10.

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steveastroukRe-design

Answer 8 years ago

Not entirely right. The only place A HV flyback transformer is used is a TV. I've designed switching PSUs that use a flyback topology that worked off very low supply volts - arguably infact a "joule thief" IS a flyback PSU.