Just picked up a Heathkit Isolated Variable Power Supply and need some info

[vortalexfan]

Hello everyone yesterday I picked up a Heathkit Isolation Transformer with a Built-in Variac for $10 locally and it does work, but I would like to know some information about it like the variac specs and the wattage capabilities and how this compares to other Variable Isolated Power Supplies from the same time period as far as being able to handle various types of radios and or TVs.

Any help in this matter would be appreciated.