Speaking of Other Hobbies...

cherokeej

Well-Known Member
Joined
Feb 15, 2009
Messages
835
Reaction score
56
Do we have any coilers on this forum?

I found some brick IGBT's with some reasonably impressive specs. 1200 volts, 200 amps... For $29 a copy. Start small, with a Class E running a hot mosfet on a CPU cooler. Then a single resonant half-bridge, then move up to dual-resonance using a full H-bridge. A hunk of 98mm FWFG a/f tubing will make a really nice secondary...

I built a SGTC way back in the day. Ran for a good two minutes before it arced inside the NST. Oh well... Guess I'll just have to see how far I can push those IGBT's.
 

cherokeej

Well-Known Member
Joined
Feb 15, 2009
Messages
835
Reaction score
56
Dual-resonant Tesla coil. Add a series cap to resonate the primary circuit at the same frequency as the secondary, and input impedance of the primary circuit goes to zero. P-in equals P-out. Two foot coil throwing 6 foot streamers...

Just for fun. And because I can solder sitting in a chair.
 

Cl(VII)

Chris Bender, Lab Rat
TRF Sponsor
Joined
Feb 22, 2013
Messages
4,945
Reaction score
1,457
Location
Garland, TX
Sounds cool, any pics/video? Being that I literally blew the leads off a multimeter this weekend (stupidity, don't ask because I ain't admitting) I will leave the electrical hobbies to others. Hard to pass off the electrical fire smell in the bathroom as no big deal to the better half. Me: :shock:...:confused2: Her: :eyeroll:...:facepalm:
 

cherokeej

Well-Known Member
Joined
Feb 15, 2009
Messages
835
Reaction score
56
Checking voltage with the DVM set on current? It's good to eyeball the setting before hooking up the leads. D'oh!
 

WAC_Hal

Well-Known Member
Joined
Jan 18, 2009
Messages
200
Reaction score
0
I've been wanting to build a Tesla coil for ages. A friend of mine and I built one back in the '60s from an article in Elementary Electronics. It used a 50 kV neon transformer as the exciter. According to the plans it was supposed to develop 1 MV. We didn't have any way to confirm the voltage, but it did throw some nice three foot long arcs.
 

cherokeej

Well-Known Member
Joined
Feb 15, 2009
Messages
835
Reaction score
56
HSC has Fuji 1200 volt, 200 amp IGBT's for $29 apiece. Now, everyone can afford to build a DRSSTC.

Already wound a small secondary. Calcs say it'll ring right around a half megahertz. Sweet. Small SSTC. Fun on a table-top.
 
Top