Hi
In a audio amp like the one I've put in that image shack link;
For the VAS transistor, if we replace the BD139 by a transistor with a very different VBE specification, like a 2SC3503, what result it would do in the circuit voltages and result ?
The BD139 have; VBE=1 V at a VCE of 2 V and a iC of 500 ma.The 2sc3503 have; VBE=.8v at a VCE of 5 V and a iC of 10 ma.
As you can see the BD139 do have his VBE at 50 time more amp the the 2SC3503
I want to understand about VBE specs and how it change the fonction of a amp circuit in a case like this.
Thank
Jean