Steven Mark`s TPU

[Earl]

@Earl,

Thanks, of course I did not put beads as the pulse XFM used are pot-cores. The funny thing is that only one of the absolutely equal other two does show said effect.
Roberto

Roberto,

try anyway, even with pot cores, to put a resistor on all three between gate and source to load down the gate impedance and transformer secondary.  Try various resistor values.

Obviously, exactly equal is not, there is a little difference somewhere.

Regards, Earl

[ronotte]

@Earl,

OK I did it: generally a 10KOhm is ok ...and I saw also that sometime they put a 22 Ohm in series with secondary...to lower the coil Q & limiting the max current (into the Mosfet's Gate @ said freq)?

Roberto

[Earl]

@Earl,

OK I did it: generally a 10KOhm is ok ...and I saw also that sometime they put a 22 Ohm in series with secondary...to lower the coil Q & limiting the max current (into the Mosfet's Gate @ said freq)?
Roberto

Roberto,

In my opinion with transformer coupling, it is better NOT to put a series resistor between transformer and gate.  I would prefer 10k or other value from gate to source.

Does 3 times 10k from gate to source make all 3 FETs act the same way with no differences now ?

Regards, Earl

[ronotte]

Earl,

sorry it has been a typo: I wanted to write 'I will do it'  (when home). Now it's impossible

Roberto

[wattsup]

@Roberto

Good luck with your trials with both ECD and TPU. May be an interesting idea.

I found this circuit on ebay;

http://cgi.ebay.ca/8000V-High-Voltage-DC-Electronic-Electric-Generator_W0QQitemZ180205242697QQihZ008QQcategoryZ97200QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

If you can look at it and say if you think it is good to try. It is 8000vdc so it is well well below my current 100kvdc device. I still want to find one at around 1000 vdc but have not found anything yet.

Why I am waiting to build is simply because I want to see this thing working in my mind first and right now, I cannot see it. So I am going to make a few small devices like the TPU design just to see some effects before making the actual build.