Some examples of schematics.

Quad II
Peter Walkers legendary amplifier Quad II, 12W

Dynako Mark III
Dynaco:s legendary mono block Mark III, 60W

McIntosh 275
McIntosh legendary 2x75W power amplifier

Halicarafters S-38B
Halicrafters S-38B short vawe receiver.

Quad 6146 power amplifier
An example showing that 6146 can be used as output valve.