I tried to rebiuld a Don Smith Device

[energia9]

Replication of one of his experiments does raise some hope. How much power that youtube plasma tube might be using afterall. It shows charging a cap by induction. And electrostatic systems have a COP of 2 minus system losses.

that plasma is about 6-10 watts / hour,  it shows charging a cap by rectification of high voltage,   Electrostatic systems do not have cop 2 minus losses,   more like they are less than 70 % efficient.

i have done a very high power one before , 
see my video
http://www.youtube.com/watch?v=0MpTeEP6zi0

i made a version of this high voltage power rectifier where i could light up a 500 watt lightbulb to exploding brightness every 5 seconds.  only with 12 watts an hour input power.
The way you can do it is high voltage speed diodes and high voltage high capacitance capacitors,  the more you connect in series the more concentrated the power gets in them , and you get shorter and shorter but higher energy outputs,  in a very short period of time,  but very short rectification recovery time
But this is still not Overunity my friend ....  very very far from that

[Google]

Energia9,

I watched the video, interesting stuff. Thanks for sharing. Input was 11.8 watts and did you repeat the experiment with many caps in series and bothered to measure the output as recitified dc after smoothening it and connected to a load.

I really appreciate your experiment but you left it half the way. Why not complete it and test input vs output.

Best,

Ps. If you get ou, please dont forget to share with us.

[Google]

Here is the Japanese version of ds device.

[energia9]

i measured how much current and voltage flew from the capacitors every 5 seconds when my 500 watt bulb lit to full,   it was 400V at 100 ampers, but for a fraction of a milisecond, thats why i was able to even damage 100 watt lightbulbs connected in series, the power goes up so high but just for a fraction of a milisecond at discharge,   when i connected a transformer in series with my bulb,  the transformer of course gave a very big humming noise, and i even damaged one.   
this thing is very dangerous btw,   touching 400V  at 100 ampers even in a fraction of a second can stop your heart.
if i would have time of a second worth of 400V at 100 ampers at discharge , i could light up  40 Kilowatts theorytically,  but i would need to scale up the  input to 90 watts,  and my number of capacitors would need to be 480 pieces in series.   so with this i could light forty thousand watts worth of lamps for just a fraction of a second.     but it would look as if it was lit for 1.5 seconds,   because it lights up, then it takes half a second to dim down.
dont play with this very dangerous.   

[Google]

   Very high explosive burst from the caps 40,000 watts in one nano second. It can melt a screwdriver if used to short the caps.