How do i measure the maximum current of an AC variable power supply with resetib

retrolefty:

my main question is this...
The 7.5Volt.Amps. is for what voltage? 8V? 15? Both?

Volt/amps is equivelent to watts if driving a resistive load. And if it's like the old variable transformers then the maximum 7.5 watt rating should apply anywhere between it's variable voltage output. The actual load current (or wattage or V/A) will of course depend of the load resistance being powered by the variable transformer.

i am trying to find the maximum amount of Amps the unit can handle before bad things start happening
i need 5 Amps minumum