Kapanadze Cousin - DALLY FREE ENERGY

[starcruiser]

@void,

Yes it is, I worked on TV repair some years back and understand the horizontal and vertical sweep frequencies of the old CRT based sets. typically most run at 15.725Khz (or close) for the horizontal refresh rate and the vertical is usually at line rate, this is 60Hz in the US and similar markets where the AC line rate is 60Hz, in the other markets this is 50Hz, thus the 2 standards of NTSC and PAL for the video.

For color TV's the time base was around 3.58Mhz for the color signals which are on the back-porch of the Horizontal sync pulse for sync'ing.

ANyways, the yoke core is designed to operate in that frequency range and will have issues with signals above this frequency. Thus the old yoke cores are less reactive to the higher frequency of the Nano pulse or the Telsa coil. Using a newer torrid core is not a good idea when working in the lower Khz range as it is not going to respond as well or will allow the higher frequency pulses to overload the lower frequency driver stage as it will back bleed and most likely kill the MosFets due to the high voltage this allowed to pass.

[itsu]

Hi Star,

you are so right, i happen to be using my T520-2 toroid in a loss-less clamp setup, but it is not so stable as i hoped for, probably because what you were saying.

The T520-2 is designed for 2-30Mhz, so i had to use more primary windings (52 double magnet wire (1mm) turns for each primary) to get the push-pull to even start working.
They measure 88uH each and cover each a half of the toroid closely wound at the inner circumference, see picture.


The signals across the drains/source of each MOSFETs shows  oscillations as can be seen in screenhot 1
The Spectrum Analyzer shows that more frequency peaks are involved, see screenshot 2
One thing that did improve was that the 4 stacked magnets have no influence anymore on this setup, and no audible hissing was heared when tuning 


Itsu

[verpies]

The signals across the drains/source of each MOSFETs shows  oscillations as can be seen in screenhot 1

The oscillations are so asymmetrical between the two MOSFETs !!!
What causes so much asymmetry horizontally & vertically ?

[stivep]

The oscillations are so asymmetrical between the two MOSFETs !!!
What causes so much asymmetry horizontally & vertically ?

http://www.semi1source.com/glossary/default.asp?searchterm=LDD
http://www.eecs.berkeley.edu/~hu/PUBLICATIONS/Hu_papers/Hu_Melvyl/Hu_Melvyl_98_11.pd
http://electronics.stackexchange.com/questions/72582/mosfet-why-the-drain-and-source-are-different
Wesley

[verpies]

My question referred to the asymmetry of signals between two identical MOSFETs - not the asymmetry of the architecture between drains and sources of MOSFETs.