Whilst out walking and pondering, as one does.... There are hundreds of designs out there for linear power amps using FETS. They all use a similar design, push-pull with centre tapped ferrite cored
Apart from requiring a higher power supply voltage I find a complementary pair (or pairs) of transistors to be satisfactory and, although the NPN and PNP sets should be reasonably matched to each oth
I had an RC 411 receiver in which extra diodes been fitted between the two bases.. Without them the distortion was noticeable, but I dont know whether it would be necessary to do this to prevent cros
