Self oscillating amplifier 2.2kW / 4R

[samponek]

 

[bucks bunny]

Are the output series inductors two halves of a common-mode choke?

 

[samponek]

Yes, they are. The two ferrite chokes on the EI40 cores with an air gap of 3 mm in series do not heat up.

 

[bucks bunny]

Ano oni jsou. Dvě feritové tlumivky na jádrech EI40 se vzduchovou mezerou 3 mm v sérii se nezahřívají.

?

 

[samponek]

They were transformers from PC 400W power supplies. EI40 cores and an air gap of 3 mm is added between E and I. The entire secondary winding is connected (original branch 12V) The primary windings are not connected. Two transformers are in series.

 

[bucks bunny]

My Questio:
"Are the output series inductors two halves of a common-mode choke"
referred to the amp schematic you showed on #21 and not to the power supply

 

[samponek]

These are two separate identical chokes connected in series.
It used to be PC transformers and an air gap of 3 mm is added.
4x Toroidal coils are in the power branches for Mosfets.
4x EI40 are output coils.

 

[samponek]

The power supply consists of old modified PC power supplies, each containing two transformers.

 

[bucks bunny]

The power supply consists of old modified PC power supplies, each containing two transformers.

thanks, this could work.