...before I get too deep.
What is pictured above is 14 pounds of copper and amorphous in the form of some 12hy 200ma PS chokes. The interesting little additional fact is they can handle 1000Vac @ 120hz without buzzing and will be used as L1 after some 872's in a GM70 amp.
Quad QA12/P Amplifier - This is pretty close to Quads first amplifier. I got to put my hands on one of these once very cool early British amplifiers. http://www.itishifi.com