How to design base drive transformer? especially the primary winding


New member
I have no idea about the push - pull proportional base drive transformer design.

the transistor of the secondary winding is 2SC3320.

I think the primary current is about 4A.

magnetic core:EE22

Vcc:12V frequencey:25kHz

primary ,secondary,feedback turns : 34T/34T/9T/9T/2T

I am so sorry My English is so poor.Does anyone can tell me how to calculation the windings?,Please...
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