Steven Mark`s TPU

[BEP]

@ronotte

Your theory is plausible. If Miller capacitance is doing this then you may have a MOSFET Negative-gm differential VCO. It is possible to build a very simple polyphase oscillator doing this.
This could explain why I'm not seeing the same thing. My opto-coupler is part of my FET assembly inside the coil.

If true then this is still a great realization - good way to know the true resonance points and tune without generators.

hmmm.... a polyphase blocking negative-gm voltage controlled oscillator? PBNgmVCO ! - There. I've coined the name!  

Seriously - this would be the simplicity needed and the same effect can be done with tubes/valves.

[otto]

Roberto,

no doubt that I want to try it.

As I remember, your collectors have the same nuber of turns??

Again, please, measure the picofarads in your TPU!

Otto

[M@rcel]

Not sure if this is off-topic, if so sorry 

Where does G-strain fit in? Look here: http://jnaudin.free.fr/html/gseamnu.htm
when you scroll down you'll see this picture:


Looks slightly familiair

[ronotte]

@Otto, BEP,

I do join with your thinking as , if again confirmed, it does means that we CAN GET RID of all the electronics stuff as it's simplicity is really stunning.

Otto, I can make any measure you want: this evening I'll start, but firstly I'll check again the 'sustained operation' and doing it while increasing the voltage applied till +45V...I can't wait to see what will happen.

Roberto

[Gustav22]

Hi Roberto,

...
As I remember, your collectors have the same nuber of turns??
...

I also wanted to ask you the same question.
As otto's collector setup is like this:

...
top collector - 9 turns - lamp wire
middle collector - 5 turns - lamp wire
bottom collector - 3 turns - lamp wire
...

How many collector-loops do you have in each of the 3 stacks?