[EdHolland]

It looks like antique electric supply might have suitable twist lock cans for the multi section electrolytic. That would be a labour saver, as they are 20 uF, 20 uF, 10 uF, 10 uF, serving all the decoupling duties for the preamp and other audio stages prior to the output section. The main HT is at 610 v, which Bogen handled with two 30 uF cans in series. They are mounted on phenolic insulator spacers, and have carboard covers, since at least one of them is floating at 300V! These, I'll probably stuff, since close replacements including the insulation won't be so easy to find. The high HT explains the very respectable 35W continuous power output from smaller O/P valves.