2008多項課程召集 - (4) 膽前級線路理論及實習班 (已完滿結束)

I want to build a AN-M7, is it has output transformer ????? how much around ??? do you have M3 or M6...???? pls adv

I think I am the last one to enroll, I will pay bank deposite tmw, pls chk