What are the things in the blue outline?

>>926723
no way to be sure. i'd guess resistors or diodes. what connects to them?

they produce a lot of heat.

Looks like selenium rectifiers.

>>926727
This guys right they are selenium rectifiers

>>926727
Correct, they're selenium rectifiers, which means what you've got there is pretty goddamned old.

>>926789
As if the wax paper caps don't give it away
Having said that

>>926723
OP those caps have to a-go-go
By now they leak worse than a grannies bladder. Swap them out form the appropriate modern equivalent.

Selenium rectifiers - dangerous. When they fail they emit a nasty gas. They have a voltage drop that you have to simulate with a resistor in series with the new silicon diode.

>>926837
also if you undo the bolt holding the stack of plates together, the rectifier will be destroyed.

>>926920
no it won't you retard.