HERE ARE SOME HARP AMP SCHEMATICS SUBMITTED AND APROVED BY OUR FORUM
This amp is designed by MARK BURNESS and features a fixed bias final stage to provide bias adjustment
to swap from 6L6 and 6V6. This is the optimum way to build an amp with swapable finals.
This amp is designed by BRUCE SAUNDERS and features a parallel 6V6 final stage. Here is his completed build
image1 and image2
This amp was designed for a forum member and features a 6SL7 preamp and a 6L6 single-ended final but the preamp can be used with any power final.