JIMMIE wrote:
I would like to experiment with some magnetic amplifier circuits but I
havent been able to find any practical circuits I could build. I am
interested in relalitively small signal amplification of AF and
possibly ultrasonic frequencies purely for educational purpose. I have
a couple of transformers and wan to see what I can do with them.

I've seen this discussed on sci.electronics.design, and there are
probably folk there who can help you.

Clifford Heath, VK3CLF.