[Hengist]

That's a beautiful looking radio! An absolute cracker.
I stumbled across the hybrid car radio audio approach recently and it appealed to me straight away. I tried to use negative feedback over both stages as in the Philips N3G82VT but it it seemed to increase distortion! I settled on a design based on the circuit in the Mullard 'Reference Manual of Transistor Circuits' (1961). Mine uses an EF98 driving a 2N3055. I thought I might change to something more authentic like an OC16 or OC26 later on but I didn't want to lose a vintage transistor while experimenting. I've tried the radio using Denco range 4 coils (5MHz-15MHz) and it's certainly lively but frankly a nightmare to operate because of the lack of screening.