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4hv.org :: Forums :: High Voltage
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Electronic gold mine flybacks

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ZakWolf
Tue Dec 14 2010, 04:26AM
ZakWolf Registered Member #3114 Joined: Sat Aug 14 2010, 08:33AM
Location:
Posts: 608
I was thinking about getting these capacitors for my tesla coil. I am not running a big one so i think these will work which ones should i get?
Link2
Link2
Link2
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quicksilver
Tue Dec 14 2010, 09:34PM
quicksilver Registered Member #1408 Joined: Fri Mar 21 2008, 03:49PM
Location: Oracle, AZ
Posts: 679
I've put 8A through those copy machine transformers and got pretty impressive performance but it really not made for current higher than 5A@12V. I've tried 24v at 3A and even pushed it a little at 35V dropping back the current. They could be used for a coil I believe. The "fat" Teflon input is coupled with #2 (the leads have numbers). Grd is a light green. My little home made HV probe said 5400v @ 12v input.

Edit:
You put a few amps through them you get those nice fat yellow arcs: not those thin little blue guys smile
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ZakWolf
Tue Dec 14 2010, 11:28PM
ZakWolf Registered Member #3114 Joined: Sat Aug 14 2010, 08:33AM
Location:
Posts: 608
LittleVenture wrote ...

I was thinking about getting these capacitors for my tesla coil. I am not running a big one so i think these will work which ones should i get?
Link2
Link2
Link2

if i use those transformers can i use these capacitors with them. how many would i need in series and parallel?
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ZakWolf
Wed Dec 15 2010, 12:12AM
ZakWolf Registered Member #3114 Joined: Sat Aug 14 2010, 08:33AM
Location:
Posts: 608
also how to i rectify that kind of voltage?

do you know what the wattage is ?
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Adam Munich
Wed Dec 15 2010, 06:42AM
Adam Munich Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
If Hz < 1000 use a bunch of 1N4007's in series.
If Hz > 1000 use a bunch of UF4007's in series.
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william L
Wed Dec 15 2010, 07:21AM
william L Registered Member #3093 Joined: Mon Aug 09 2010, 11:40PM
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Posts: 68
do you know what the wattage is ?
well, in a perfect, lossless situation, I would say 60 watts.
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ZakWolf
Wed Dec 15 2010, 07:22AM
ZakWolf Registered Member #3114 Joined: Sat Aug 14 2010, 08:33AM
Location:
Posts: 608
thanks Grenadier.

What about those caps in the previous post? Are they any good.
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Adam Munich
Wed Dec 15 2010, 07:38AM
Adam Munich Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
The 7500pF 1800V caps look OK for a MMC. remember, the capacitance needed will be dependent on your transformer and your coil.
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ZakWolf
Wed Dec 15 2010, 07:45AM
ZakWolf Registered Member #3114 Joined: Sat Aug 14 2010, 08:33AM
Location:
Posts: 608
thanks.

I am thinking about running a 2 or 3 transformer stack of those HV copy transformers or what ever they came from( not the flyback). Will that make a decent coil? i am going to wind a new secondary. I was thinking 1'-1/2" tall and 3 to 4 inches in diameter.
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ZakWolf
Wed Dec 15 2010, 08:22AM
ZakWolf Registered Member #3114 Joined: Sat Aug 14 2010, 08:33AM
Location:
Posts: 608
how does this look. I am going to make my new secondary a foot and a half tall and 3 inches in diameter with 28 awg wire. As far as the primary capacitance goes for the calculations i put my capacitor value of what i have right now 7.5 nf which is 0.0075uF i no thats wrong but thats as close as i can get. here are my calculations :)

1292401256 3114 FT103208 New Coil
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