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Messages - Blin

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1
Thanks so much for your answers.

I've been experimenting with the circuit and working on the PCB (which I'm all new to, so it's taken quite a bit of time). Now I need a good secondary...

Mads, I've read your guide, and decided to go for a 30 cm height, 8 cm diameter secondary and 800 to 1200 turns. Started looking for wire and then found a pre-wound secondary on ebay: https://www.ebay.com/itm/Teslaspule-32x7-5-cm-1000-Wdg-0-2mm-Tesla-Coil-Spule-TC-001-HVSHP/273279706078

Seems to be perfect for my usage, and to be honest I'd rather buy it pre-wound than do it myself. So I have a few more questions now :)
  • Is the secondary in the link above able to produce good sparks in my use case?
  • For the primary, I think I'll just use some insulated copper wire from an extension (rated 30 amps or so). Ok as well?
  • The grounding: I'd like to just use the earth connection from an extension. I suppose it's ok as well?

Thanks, and I'll post photos when I have something working (which might take quite some more time...).

2
Hello all!

Newbie in tesla coils (and in electronics) here, I want to build a SSTC (not a DRSSTC - I want to keep it as simple as possible for now). I think I understand most of the circuits around here, but I have some questions before I start building.

I plan to start with a single MOSFET SSTC to keep things simple (later I'll build a half bridge, then full bridge).

I've seen this design from E-Schmok and I want to build something similar, but I want to be sure I understand the purpose of some components in this circuit.



I got the interrupter part figured out already, my questions are about the power part:
* Can the power supply which powers the primary and MOSFET be a regulated switch mode power supply?
* What's the purpose of R13 and C23? Looks like a RC snubber?
* What's the purpose of D5 and D6? I guess it's to clamp the voltage to the MOSFET gate but 15v should be harmless for an IRFP540, so I'm wondering.
* Any reason to have 2 push-pull stages (Q5-Q6 and Q7-Q8)? Would a single one be enough?
* What's the purpose of C19 and C20?

I'm also a bit lost about the secondary design. I've seen different advices, sometimes contradictory. I've put some values in JavaTC and got a diameter, height and number of turns, but I don't want to make a secondary that won't produce sparks with my single transistor design. Is there a rule of thumb for secondary designs? How much does it depend on the power circuit?

The transistor I plan to use is a fcp20n60 (600V, 60A pulsed, RDSon=0.15) so not the best one out there, but I've got quite a few and I don't care if I blow them up.

Thanks for your insight, I still have a lot to learn...

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