Hi all! I would like your help with something I'm designing...Well, actually transforming. I'm trying to simplify the circuit above into one that would completely omit the transistors and transformer parts.
The reason why this is needed is because this transformer is now obsolete and can't be found in small quantities anymore and because transistors make the circuit look complicated, where in my opinion a single opamp could be used as a two signal mixer. As I understand, the role of the transformer there is for the two signals combination, along with impedance matching and current increase to the load while keeping current at minimum levels on the transistors side.
So, what do you think, is my thought correct? I was thinking about two signals mixing using an opamp and then using a T-network to match the impedance. And also replacing the transistors with a 2n7000 just before the T-network.
The needed values for load are: Impedance: ~1000ohm, Current: ~15mA adjustable. Any help would be much appreciated.