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A good ham radio pal gave us a VARIAC that was collecting dust in his shack. We often wanted a VARIAC, but really didn't need one so this presented a prefect opportunity to make our VARIAC dreams come true.
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Without an enclosure the danger of a 120VAC unprotected appliance rolling around on the test bench can be pretty hazardous. We fixed that by repurposing the cremation remains box of a loved one. We also mounted a switch and voltmeter to the box.
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The simple schematic is show here:
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