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Forums
4hv.org :: Forums :: High Voltage
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AC flybacks aren't dead yet!

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Dr. Drone
Tue Jul 12 2011, 08:07PM
Dr. Drone Registered Member #290 Joined: Mon Mar 06 2006, 08:24PM
Location:
Posts: 1673
shades
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Adam Munich
Tue Jul 12 2011, 09:03PM
Adam Munich Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
Hey guess what guys it works shades


1310504545 2893 FT119461 Dsc00443


At 36V thqat crappy core saturated and blew up all the silicon on my driver, but before that things were working great.

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H8erade
Wed Jul 13 2011, 08:01PM
H8erade Registered Member #3451 Joined: Sun Nov 28 2010, 11:13PM
Location: United States
Posts: 100
You really have some ingenious ideas, Grenadier!
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Micha0_0
Thu Jul 14 2011, 01:50AM
Micha0_0 Registered Member #2990 Joined: Mon Jul 12 2010, 11:22AM
Location:
Posts: 40
today i found such a ignition coil from a chainsaw :D
how much voltage does that thing give ?
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the mad scientist
Sat Jul 16 2011, 01:44AM
the mad scientist Registered Member #3768 Joined: Tue Mar 22 2011, 12:46AM
Location:
Posts: 107
nice
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Arcstarter
Sat Jul 16 2011, 02:19AM
Arcstarter Registered Member #1225 Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
I have used a magneto with it's original iron core once. I powered it with a light dimmer and series capacitor, and it gave some pretty nice arcs, starting somewhere near 1 inch, and then it blew to hell. These coils have 2 windings in them, one is the HV output, and one is shorted to the core (IE, common) to kill the engine.

You must be careful though, as some of them also have a magnetic sensor and transistor in them to trigger at the right time. Im sure the winding with less turns is somehow connected to the transistor, so inputting some hundreds of voltage would not be great for it. Also, these cores do *not* like squarewaves. They will saturate and pull alot of current, and probably burn up the 'auxiliary' winding.
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Conundrum
Sun Jul 17 2011, 06:41AM
Conundrum Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
Step 1: go mining in an old Tektronix guy's shed, and find 5 (!) old Tek scope flybacks.

Still in original packaging, lol!
-A
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Juniortore1
Wed Jul 20 2011, 08:00PM
Juniortore1 Registered Member #4014 Joined: Wed Jul 20 2011, 05:31PM
Location: SE Michigan
Posts: 25
I have been thinking of doing this for months now. I think within the next week I will give it a shot since I have to wait for some mosfets to come as I believe I blew my IRFP460s on the ZVS
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