Rent or borrow a small portable generator, set the governed engine speed 
down to provide the necessary frequency. Many times the voltage is 
regulated so it still will be there. Would need to check if this is 
possible with the generator you have available. Some generators have a 
jumper or wire settings. Just a thought of brain storming. :)

Mark Scoville wrote:
> Hi Piclisters,
>
> I have a project at work that I need to test while powered from 120Vac 50Hz.
> All I have available in the USA (Cleveland, Ohio) is 60Hz. Does anyone have
> any clever and inexpensive ideas for how to generate 120Vac 50Hz? I need
> about 4 amps to do my testing.
>
> So far my thought is to buy a "Modified Sine" inverter ($100) that runs off
> 12Vdc and produces 220Vac at 50Hz. Then I could step down the 220Vac using a
> transformer (which we already have). It's not very elegant, and not ideal,
> but this is only needed for a few days of testing and then will probably sit
> on a shelf for 20 years getting dusty.
>
> Anybody have any other ideas besides a really long extension cord to a
> country that uses 50Hz.
>
> -- Mark
>
>
>
>   
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