zeus_threat said:I'll do the recommended changes you mentionned francis those you are mentionning for C7 and C13 were my initial design goals. I'll do the other mods as well and keep to the original 2 pair of output.
Just an after thought, a discrete Darlington VAS circuit might be better if you use such a large (relatively) transistor as the VAS.
A Darlington pair is with the collectors connected together - that's bad becuse of feedback via Cob.
You buffer the VAS transistor with an emitter follower which has its collector connected to ground.