Kapanadze Cousin - DALLY FREE ENERGY

[Black_Bird]

@hoppy

Try the x10 probe, which normally has a better frequency response and rise time.

[Hoppy]

@hoppy

Try the x10 probe, which normally has a better frequency response and rise time.

Same result.

I intend to knock-up a PCB for the re-build.

Regards
Hoppy

Further investigation indicates that its not primarily a build problem. Increasing the collector voltage with just the toroid as the collector load, reduces the pulse width under 1uS with an increase of rail voltage to 30v This also reduces both the leading and falling edge slopes. It looks to be essential to carefully limit the base current (maybe less than 35mA) so that when the collector voltage is increased to the specified 150V, the power dissipation of the transistor is kept within SOA.

I still need to re-build just to tidy things up, so will post some more waveforms when completed.

[itsu]

@All,

while improving my MOSFET design, i quickly put in my KT926A transistor to see if with my new nano-pulser (74HCT02) i can drive this transistor into saturation.
Well, obviously not, see the video: http://www.youtube.com/watch?v=z6yJ67YSOYM&feature=youtu.be

By the way, the casualties in building this Dally replication up till now:

Regards Itsu

[Hoppy]

@All,

while improving my MOSFET design, i quickly put in my KT926A transistor to see if with my new nano-pulser (74HCT02) i can drive this transistor into saturation.
Well, obviously not, see the video: http://www.youtube.com/watch?v=z6yJ67YSOYM&feature=youtu.be

By the way, the casualties in building this Dally replication up till now:

Regards Itsu

Itsu,

What happens to your pulse width if you replace the load resistor with your toroid and increase the collector rail voltage from 12V to say 50v?.

Regards
Hoppy

[itsu]

Itsu,

What happens to your pulse width if you replace the load resistor with your toroid and increase the collector rail voltage from 12V to say 50v?.

with or without the flyback diode installed?

Regards Itsu