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after finishing my first coil bigish DRSSTC ive decided to build a micro coil probably 12v or 9v. should have probably done it the other way round! anyway theres loads of info on micro coils but need some advice on which direction to go. i was planing on using a secondary coil i randomly made out of a pen 1cm by 8.3cm. so my question is how can i get the biggest arc was looking at a rotary spark gap or solid state (something cheap!)
this little video made me want one! the rotary spark gap looks really cool!
ive got a few spare parts lying round the house that i might be able to use. 4x FGPF7N60RUFD IGBT's 2x 2000v 0.33uf caps 4x 2800uf 200v car coil
can i use the parts above or are they a bit extreme? can i use the igbt's for a solid state? anyway any direction would be very helpful. quite a different way of thinking when there tiny.
these two links are the direction i was looking at Dr. 2N3055
are there any plans to make a micro rotary spark gap like the youtube video above that anyone knows about?
Registered Member #1451
Joined: Wed Apr 23 2008, 03:48AM
Location: Boulder, Co
Posts: 661
I think you should go solid state if you wanna stay truly micro. With a SGTC the tough part will be finding a high voltage source small enough to fit in the base. Of course you could use 120v and a contact style rotary gap but that would only work for so long.
Use you IGBTs and you could put it all into a pretty small package with a little work.
thats the secondary and topload. im basically making it for a model so its going to look a bit like a evil tesla coil robot its going to be on a base so i dont think the size of everything else is too much of an issue. what would be better for the cap bank a car coil or the other caps as listed. was thinking of using the 2 2000v 0.33uf in series.
Registered Member #1451
Joined: Wed Apr 23 2008, 03:48AM
Location: Boulder, Co
Posts: 661
In that case, you could try and rectify the output of your ignition coil and use that to feed the SGTC. You'll want to find or make some caps that can stand higher voltage, say 50kV. Some simple rolled transparency sheet caps would work great and be cheap.
You might also want to wind your secondary with a higher gauge wire. It looks like you have 22awg or something; try at least 30 awg.
its 26awg but ive had a load of it left from my last coil so i thought id try and use some up. 50kv! much higher than i thought! do you recommend any particular caps? was looking at these. 50 seems mad!
ive just found a tubular fluorescent lamp ignitor thing.. quite a big transformer on it. cant find much info on it. could i use this for the supply as apposed to the ignition coil? it says L15A 240v w15 capG13 A0,33 presume its 15w 0.33 amp...
also what kind of rotary spark gap should i look into building? i dont have much experiance in this area and theres so much info i really dont know which way to go?
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micro tesla coil advice
