testing a PSU output under load?

[LaceSensor]

Hi

I have a 12v AC output on my power supply unit, and want to test how it is under load
Reason being I want to power my TZF from it, which is rated for a 9v AC supply.
Im told by Dave Fox that if its really 12v under load, it will be ok, as most (unregulated) AC/AC wall warts put out 11v approx.
If its much higher though, apparently it might overheat the regulator(s) inside the TZF = not good

Ive tested with a DMM just the electrodes connected to a cable from the power supply and get a steady 12.2-12.3v AC
I assume under load would be lower than this, but I dont know how to test it "under load" other than to connect to a pedal that wants 12v AC...and I dont actually own any!

How can I simulate "load" and test this properly. I dont want to fry my TZF (although Im sure I could fix it) for the sake of 1 more wallwart...

thanks!

Ian

[alanp]

Power resistor of some sort is the most obvious route. You can get some really, really chunky ones suitable for 50W amplifiers, so the kind of load a pedal uses should be a doddle.

[LaceSensor]

High you might have to spell it out for me? Like put a resistor across the terminals then test the voltage?

[nzCdog]

What is the current requirement of your device, Lace? What does the manual say? If you know that we can do some maths

[peterc]

What is the rating of the PSU? Does it say 12v @ 500mA or 12v 10w, something like that?

If there is a rating, its easy to determine the max current it will output and determine a test current for 'under load' conditions.

Peter

[LaceSensor]

It was for the paradox TZF but Ive decided to play it safe and run it off a line 6 9vAC supply.
Dave Fox is such a legend though he told me even if I fried it he would fix it for free haha
I could probably fix it myself but its great customer service (especially as Ive never paid him a penny)