Quote from: itsu on October 08, 2014, 01:29:58 PM
hi Jeg,

not sure what you mean by  "your yoke's primary oscillation".

Sorry for the delay but posts grow up very quickly and i miss some from reading!

When mosfets open and close there is a higher oscillation of about 600KHz-900KHz, superimposed on the peak of the low KHz base signal. Those oscillations are due to the sub-resonance between the half yoke primary, the 2,2nF cap, and the capacities of the two diodes (snubber side). If you play a little with those capacities you can tune those oscillations to a subharmonic of your grenade and take an advantage of them.

Akula is not a child for designing protection snubbers with so much noise. My opinion is that this so called snubber is not there for protection but for artificially producing these HF oscillations and load them on the low frequency base signal of 17 or 27KHz.

You also lack the one side pushing from your yoke's primary which only happens at a cw-ccw arrangement.

Quote from: itsu on October 10, 2014, 04:57:00 AM
Hi Enjoykin,

I am following this original Ruslan diagram: 
http://www.overunity.com/12736/kapanadze-cousin-dally-free-energy/msg417159/#msg417159

with the modifications as mentioned yesterday in my post #5682

Regards Itsu

Hi Itsu. It has been pointed out several times here that this schematic is not
created by Ruslan. It was created by mikmur and posted on the realstrannik forum. 
The schematic combines a portion from Akula's schematic with various changes/additions
made by mikmur, and was not directly based on any actual device. The only schematic Ruslan
has released (for his recent devices anyway) was the hand drawn schematic which only had blocks
for the push-pull driver and kacher driver.
All the best...

Thanks Void,

i will refer to it in the future to the original Mikmur diagram then.

Regards Itsu

Hi Itsu. Was thinking about the high voltage falling off on your kacher, shown in your video. 
If you measure the drive signal/power to your kacher circuit on the scope, does the drive/power
to the kacher remain exactly the same? If the drive to the kacher circuit is not falling off,
then one possibility is you may be getting corona discharge or arcing somewhere in your tesla coil.
You may not see anything, but you may hear a slight sizzling noise on the coils or maybe smell
some ozone if this is happening.
All the best...

Void,

the yellow trace is the collector voltage, and it does not fall off like the output does.
As the input current (3A) stays the same (or even increase when the output goes down),
i doubt that the drive signal/power is decreasing.

At 900V pp i also doubt there is any corona discharge or arcing somewhere in the Tesla coil,
i certainly did not hear any sizzling noises (i know how a kacher should sound like).

One thing might causing it as i feed separate 12V to the Kacher primary coil directly from the PS,
but the return (emitter) goes via the breadboard return path which might pose a problem for this 3A.
I did not notice any heating up, but i will change that tonight for a direct return path to the PS too.

Thanks,  regards itsu