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Registered Member #989
Joined: Sat Sept 08 2007, 02:15AM
Location: São Paulo, Brazil
Posts: 476
Hi all! I have made my first DC MOT Power Supply with Doubler.
A time ago I was try to made one, I made everything but I was have a problem with the Choke (or ballast in some cases) for the High Voltage Out.
Some say it needs to have a few Henry. So I stoped the project. Now I have returned with the project with an idea. Using my Old 5kV NST as a Ballast.
I was worried about the current, but when I tryed I didnt have any problems with it, the nst doesnt get heat in the secondary. I used two diodes and 2 cap bank. It have a few problems because one cap is the original MOT Cap, other is one that I have made with 10 200V 220uF capacitor's in series. But it actually works, and works good! The diodes is 7 1n4007 in series, It can handle 1A 1000V Reverse each one, I think its a good idea.
Here is a video:
Some experienced members, comment about using NST as a Ballast pls :)
UPDATE: 19/05/2008
Here I am updating this topic :P Some PICs of the work, Soon I will make a better work on it.
All stuff: Cap Bank:
Some arcs:
Thx
Link to youtube changed, I put a warning on the video about the wires
Registered Member #528
Joined: Fri Feb 16 2007, 10:32PM
Location: Warsaw, Poland
Posts: 166
May I comment a different matter? Lethal current and voltage combination, yet you're holding only wire's insulation and your skin was 1-3mm away from high voltage. Thinking more, youtube is very popular, so there might be people who would try this like as you have done. Oh well.
Registered Member #538
Joined: Sun Feb 18 2007, 08:33PM
Location: Finland
Posts: 181
Tonic wrote ...
May I comment a different matter? Lethal current and voltage combination, yet you're holding only wire's insulation and your skin was 1-3mm away from high voltage. Thinking more, youtube is very popular, so there might be people who would try this like as you have done. Oh well.
I guess hes holding the ground wire which is "safe" atleast if the ground wire stays connected... If it breaks loose I will probaply arc through.
Looking at the video - the cable seems to be high voltage - the wire is thin and the insulation looks very thick (is this a cable from a flyback ? ). BUT I agree with Tonic - doing such a thing (and showing it online) is irresponsible. If someone unexperienced see the video and try this with ordinary low voltage cable the result may be death.
Registered Member #989
Joined: Sat Sept 08 2007, 02:15AM
Location: São Paulo, Brazil
Posts: 476
Hmm, Yes the cable is a High Voltage Cable that I bought. It can handle 40kV (its writed on it) it have 4,5mm insulation with 0,5mm wire. But its correct, someone can see and think it can be a normal cable.
About the arc, yes its very hot, I was getting titanium very bright red :P I plan to use on a tesla coil, but I didnt have good results puting a capacitor on other side, I will post some videos with and cap on the 4kV out.
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DC Doubler MOT Power Supply
