Kapanadze Cousin - DALLY FREE ENERGY

[Hoppy]

It seems this way, but photos can be deceiving.
Where is the archive of Dally's photos (and videos) ?

See here.

Regards
Hoppy

[Hoppy]

What are those elements behind the PCB circled in yellow?

The KD203A rectifiers.

Regards
Hoppy

[verpies]

See here.

I did not see any intermediate transistors on the photos there, either.

However on this video at 1m31s, some intermediate component (looks like the TO-220 case) is visible. This could be the intermediate transistor driving the base of the KT926A power transistor.
You can see it circled in yellow on the video snapshot attached below.

[verpies]

The KD203A rectifiers.

According to this, these кд203A diodes can withstand 420V of reverse voltage.
This would mean that for them to work in avalanche mode (not DSR mode) they would require more than 420V to break down.
Maybe, just maybe the W2 of Tr1 could provide sufficient voltage for this, if Tr1 worked as a saturated flyback transformer.

Did anyone ever ask Dally whether he intended his кд203A diode to work in avalanche or DSR mode?
...or did he drive the base of his KT926 transistor directly from the TTL Integrated Circuit or via some intermediate transistors?

Vasiliy, Cергей, anyone?

[Hoppy]

I did not see any intermediate transistors on the photos there, either.

However on this video at 1m31s, some intermediate component (looks like the TO-220 case) is visible. This could be the intermediate transistor driving the base of the KT926A power transistor.
You can see it circled in yellow on the video snapshot attached below.

I think this is the 5V regulator for the nano pulser board. He has separate regulators for the VCO and nano pulser as indicated on the schematic.

Regards
Hoppy