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4hv.org :: Forums :: High Voltage
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Little Jacob's ladder

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Patric
Thu Nov 12 2015, 04:16PM Print
Patric Registered Member #2899 Joined: Wed Jun 02 2010, 06:31PM
Location: Deinze, Belgium
Posts: 254
It works (with Mazzilli driver)! I like to use this circuit for a little Tesla coil, but I (still) do not know if it will work. Any suggestions?

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Signification
Thu Nov 12 2015, 04:55PM
Signification Registered Member #54278 Joined: Sat Jan 17 2015, 04:42AM
Location: Amite, La.
Posts: 367
I found that if you use --very-- thin gauge wire, even less than 30AWG (like flexible thread), you can precisely adjust a slight straight slope for very long wire lengths by pulling the wires UPWARD by their tops. I have even gone from NST-on-floor to wire-at-ceiling with easily adjustable gap--the main trick is that the wires don't hold a -bend- It's texture is actually thread-like. Make sure the narrow gap is the lower gap and that the the wires rise straight up--gravity!!!

What are the specs of that transformer (mA and kV)?
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Patric
Thu Nov 12 2015, 05:01PM
Patric Registered Member #2899 Joined: Wed Jun 02 2010, 06:31PM
Location: Deinze, Belgium
Posts: 254
The transformer is 12V 5A.
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Sulaiman
Thu Nov 12 2015, 07:04PM
Sulaiman Registered Member #162 Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
that is the most amazing 12 V @ 5 A arc that I've ever seen ! wink

for less than perfectly straight metal wires,
if you clamp one end and pull the other (thicker wires will need leverage)
when the wire stretches just a little, less than 1% elongation, stop pulling.
The wire will be amazingly straight !

tinned or enamelled copper wire work well,
the tiny % elongation does not seem to damage the insulation.
good enough for my uses.
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Patric
Thu Nov 12 2015, 07:46PM
Patric Registered Member #2899 Joined: Wed Jun 02 2010, 06:31PM
Location: Deinze, Belgium
Posts: 254
Thanks. The two 'wires' are little iron tubes from an old lamp. smile
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Signification
Thu Nov 12 2015, 08:49PM
Signification Registered Member #54278 Joined: Sat Jan 17 2015, 04:42AM
Location: Amite, La.
Posts: 367
you need to look for a LOT higher voltage and a LOT lower current--usually it's somewhere on the transformer with the ladder leads attached. I don't know where you are getting 12V @ 5A but it is NOT from the spark source transformer, and it's too big for a solid state module--in agreement with Sulaiman, and accounting scaling, that's the best JL arc I have seen.
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Patric
Fri Nov 13 2015, 05:54PM
Patric Registered Member #2899 Joined: Wed Jun 02 2010, 06:31PM
Location: Deinze, Belgium
Posts: 254
I do not understand everything... To make it clear, here is a picture of the giblets:

1447437234 2899 FT173880 Jaco
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hen918
Sat Nov 14 2015, 10:45AM
hen918 Registered Member #11591 Joined: Wed Mar 20 2013, 08:20PM
Location: UK
Posts: 556
Quite a nice setup, you have a mains transformer (a 12V one, I am assuming) rectified and smoothed powering a Mazzilli driver attached to a flyback transformer. Looking at the number of turns your output will probably be about 20kV at 5-10mA
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Patric
Sat Nov 14 2015, 03:52PM
Patric Registered Member #2899 Joined: Wed Jun 02 2010, 06:31PM
Location: Deinze, Belgium
Posts: 254
Yes. smile
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Signification
Sat Nov 14 2015, 04:51PM
Signification Registered Member #54278 Joined: Sat Jan 17 2015, 04:42AM
Location: Amite, La.
Posts: 367
...never seen one like that before--like an NST with NO POTTING, great!
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