I own a 100 Watt rack mount Traynor (PA system) amp that I've used for years. I'm thinking of building two just like it for a project. In looking at the design, there's something that I haven't been able to figure out what it's for. I first thought it might be an error on the drawing, but in looking at the amp, it is indeed there.
I understand the circuit around the 2N6553 is a current sink, but what in the world does the zenor (1N4745 going to ground) in series with the 22MF cap do? Is it some kind of limiting circuit? I've not seen anything quite like this before.
I understand the circuit around the 2N6553 is a current sink, but what in the world does the zenor (1N4745 going to ground) in series with the 22MF cap do? Is it some kind of limiting circuit? I've not seen anything quite like this before.