look at the capacitor connected to the transformer.
That is a constant
voltage transformer and will need 50 hz to work correctly.
Hey, I have one of these on a shelf as a "spare" 8/a chassis (with almost
enough spare boards to make a spare 8a :-)). I'd like to know if the 50Hz
turns out to be a strict requirement or not. If so, is there is any easy
way to convert the thing for 60Hz?
Thanks!
Vince