getting there

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Well, I have got a result that appears to be something that I can improve on.  My VIC as pictured is three coils of 28 gauge 1000'  and a primary 21 gauge about 120'  I used the laminated strips from an old 110/220 step up as the core.  Sebosfatos PLL with a pic up coil rests next to it.  Resonance with clicking sound and input amp bump up at 2.5khz.  Gas production is not great but surges from second to second.  3.5" 3/4" tube outer with 1/2" solid rod.
Coil resonance can be found manually and the PLL nails it right off.  Definate clicking sound with either way at resonance.  1000v spikes on the oscope.
Now to tune gating.  Could not have got here without the forum.
kb 

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That sounds great! Have you tryed tuning the chokes as Tony advised?
anyway it sounds like you have a great setup that you can improve upon! keep up the good work and keep us informed

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Dave,
That is my intention and direction.  Trying different diodes today.  I am seeing some variation in performance from several uf diodes and diode types.  My idea was to make the chokes so I could add or subtract wire to tune accordingly without disassembly.  It's all experimental.  I have observed what appears to be two distinct sized bubbles, a small even sized group that run up along the inner rod and a larger faster group that runs up the middle of the gap.  One of my next steps is to make the identical coil set up with a newer bigger fine iron powder epoxy molded core to get a direct comparison.  I also appears that iron wire chokes strongly clamp down on amps out and produce little gas.  I'm still reducing turns of the iron wire to a point were I see some response. 
kb
 

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can I ask what your voltage and current ratings are for each kind of gas production?

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Hi Dave,
The voltages are as in the photo gauges, 12v in, 1-2 amp in, 25ma at the tube.  My PLL crapped out so I'm stalled again.  Gas is 1/2 that of a 8XA ferrite micrometals torroid at 12v in, 1amp in, 25ma at the tube.
I'm still thinking that it is normal electroylsis.  For example, with my 8XA I can run 3amp in and 200ma at the tube and do 100x more gas.
kb
 

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dave, correction, the 8XA torroid is running at 50 volts from the variac and 200ma in, 200ma through the tube also.....

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Hi Dave,
The voltages are as in the photo gauges, 12v in, 1-2 amp in, 25ma at the tube.  My PLL crapped out so I'm stalled again.  Gas is 1/2 that of a 8XA ferrite micrometals torroid at 12v in, 1amp in, 25ma at the tube.
I'm still thinking that it is normal electroylsis.  For example, with my 8XA I can run 3amp in and 200ma at the tube and do 100x more gas.
kb

Nice to see you are getting good results. I suggest you to put your pll circuit and the mosfet with heat sync in a wood box. I think it makes less static electricity. well since i did this i didn't burned the circuits anymore...


seems like, if the drain of the mosfet( normaly the mounting hole) has contact with the wood, it will form a wood capacitor to somewhere else where the ground is... is a good thing..


Br
sebs

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Seb
I'll give it a try.  It was reverting to 60hz and that was the clicking sound in the vic after a while.  My iron powder epoxy vic was a bust.  Ebay had some ferrite bars that I can try next perhaps.  The 60hz step up laminated strips didn't transfer signal power well above 500hz.  ...oh well it was learning experience...
kb