Капанадзе

[Jeg]

Hi Jeg. I have made it clear I am talking about the 'all in one' circuit.

It is just that i safely assumed that they work on the same principal.
If i'll move to the smaller device would be because it needs lower frequencies which easier to make.

[Jeg]

Yes, ballast works in a modulated phase 50 / 60Hz system, for example with a frequency of 47Khz which for TT can excite on Mhz. If only one power stage is working, it will be pulses! not sine when the ballast works with the lamp.

Thanks r2fp! Does it happen to have a link with a similar circuit to analyze?

[Void]

It is just that i safely assumed that they work on the same principal.
If i'll move to the smaller device would be because it needs lower frequencies which easier to make.

Yes, the 'all in one' setup appears to be the heart of the 'monster' setup.
I think it would be easier to try to get the 'all in one' setup working first.

[r2fpl]

Thanks r2fp! Does it happen to have a link with a similar circuit to analyze?

I have several different ballasts and they all work similarly. The difference is only in the frequency of kHz. Bunk used one transistor I think because only in this mode you can have pulses. Transistors Q5 and Q6 have been removed but you can see one on the wires on the side. This gives the answer that we have a pulse generator in 50Hz modulation with a frequency per kHz. This is how it shows.


The ballast used by Bunk in the photo is for one LAMP

[Void]

I have several different ballasts and they all work similarly. The difference is only in the frequency of kHz. Bunk used one transistor I think because only in this mode you can have pulses. Transistors Q5 and Q6 have been removed but you can see one on the wires on the side. This gives the answer that we have a pulse generator in 50Hz modulation with a frequency per kHz. This is how it shows.
Bunk picture ballast:

Hi r2fpl. Good detective work!
Which Bunk video did you take the screenshot showing Q5 and Q6 missing from the circuit board?