Hee hee . . . here, if you blink just as the A/C kicks in, you think you've gone blind. We're about the 3rd house down from the nearest transformer.
Point taken about the AVO 8 not reading true RMS, but just another aside: You'll note in the schematic the movement is 37.5 micro amps. By some means or another, they make that become 50.
When I was testing the movements prior to shipping, I set my UK AVO to 50 micro amps DC current. The movements then (mostly) agreed with the AVO.
I found one of the resistance settings provided me with 70% of 50, so I could used the battery in the meter for a quick check.
I spent days packing these unites. Shipped them to five different countries.
I seem to remember this man's name. Just look at the white highlighted bit lower down! Numbers look familiar?
I had both these movements - 72, I think, but the one with the knob seems to be hiding from me. Spent hours looking for them before heading back to Texas. Might still be there, but getting a bad feeling someone from the storage place may have stood on a box and slung them out. The knob ones could make 200 quid each.
People are restoring these - even re-manufacturing the complex switches. They really do analyze the valves in great detail.
Tube Tester AVO V.C.M. 163