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Tube cell reloaded

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haithar:
Hi there,
now as i have a much better knowledge of electronics, semiconductor parts, circuits and calculating everything i have setup something again.
Made a tube ready (see pic) and built the vic circuit.

Unfortunately there is no superelevation of voltage at coils or cap.
The coil is around 0,2m long, bifilar wound with ferrite core (i believe). Gap of the cell is around 0,001m.
Diodes are 1N4007 (1000V,1A). One freewheel diode and the blocking diode.

Problems as of now:
- My selfmade signal generator using a mikrocontroller isn't stable, frequency is switching
- No transformer yet, the only one's i have is 12 V : 230 V
- don't know the capacity of the cell. Ohmic resistance is there, but also not measurable because it's not linear (draws 0,5Amps at 3,9V and 1 Amp at 5V)

Next steps:
- I'll connect the cap to 230V / 50Hz plug-AC and measure the current and then calculate the capacitancereactance of my cell at 50Hz
- I will use the transformer i have, the dude on hyiq.org did the same and it seemed to work for him.
- Also, I'll have to build another signal generator.

I'll be posting regularly

haithar:
alright.
frequency of the generator is stabilized a bit,
i have the transformer (12V:230V), which strangely enough creates sine-waves from square pulses. 12V in around 150V peak to peak out.
measuring that with the oscilloscope is fine, but as soon as the diode get's in it becomes 75V direct voltage. probably the diode is acting as a capacitor, don't know. frequency was 220kHz.
when connecting the tube cell there is no voltage at the cell and no voltage at the transformer, i guess too much power needed to have the voltage stable.
what bugs me most is that with the diode i cannot measure any pulses or half-waves even.

pictures to come :)

Steve:

--- Quote from: haithar on April 02, 2010, 19:38:04 pm ---alright.
frequency of the generator is stabilized a bit,
i have the transformer (12V:230V), which strangely enough creates sine-waves from square pulses. 12V in around 150V peak to peak out.
measuring that with the oscilloscope is fine, but as soon as the diode get's in it becomes 75V direct voltage. probably the diode is acting as a capacitor, don't know. frequency was 220kHz.
when connecting the tube cell there is no voltage at the cell and no voltage at the transformer, i guess too much power needed to have the voltage stable.
what bugs me most is that with the diode i cannot measure any pulses or half-waves even.

pictures to come :)

--- End quote ---

Looking forward to your progres and pics!   ;)
My 2 cents:
You have a deadshort condition when you hook up the wfc to yr trafo....
When you measure the cells resistance, or when you do dc tests and you measure amps and voltage, you will know resistance.
Something like 1 ohm for a parallelcell or even less......
However...if you go from a 50% duty towards a 5% duty cycle, you might be able to pulse very short bursts and you prevend the current from going thru the cell.....


Steve



haithar:
My idea was similar. The resistance of the cell is very low (maybe even 1ohm as you said). Therefore at 75V dc it would need 75 Amps direct current. The transformer obviously isn't able to deliver 75A and thus the voltage breaks down to zero, similar to a dead short like you said, even if it isn't a real dead short.
I'll try the smaller pulses, duty cycle was around 40% at the moment.

haithar:
Pics:
(http://j.imagehost.org/t/0566/IMG_6969.jpg) and (http://j.imagehost.org/t/0622/IMG_6967.jpg)
Container with tube in it. Didn't have a better one or money for a better one. I put calcium in the water for conditioning (white insulating layer). Will probably wrap the inner tube with thin plastic. Brown muck is generated slowly, but nearly nothing anymore.

(http://j.imagehost.org/t/0039/IMG_6971.jpg) (http://j.imagehost.org/t/0633/IMG_6972.jpg)
PWM Generator, Multimeters, Bifilar coil, Transformer.

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