It's electronics, but not as we know it Jim.

[ppppenguin]

The main point of circuit diagrams is to aid the designers and maintainers of the equipment. Tektronix, in the good old days, were at the very top of that game. By contrast the Melford monitors I'm working on at the moment have very poor diagrams. The ones in the OP are just weird. They may be art but they can hardly aid somebody trying to build or maintain the equipment.