Hello, I inherited an electric sign and would love to fire it up. It requires 7v ac so far I can't find the original and hate to buy one. I have found a 10-12v ac power supply (little black box plugs into wall) I would like to know how to cut that down to 7v. Any help is appreciated. Thank you.

 

How much current does it need?

 

I don't think I have ever seen a 7 VAC wall wart.
The basic premise here is that, out of voltage, current, resistance, and power, we need any two of them to do the math.

 

Sorry guys it's 35w. Thanks for replying

 

Seven volts 5 amps? I'm getting nothing on vendor sites. Get your flashlight and magnifying glass and see if you missed the first two numbers, as in, "117 VAC". Any sign of a power cord or a hole for a power cord? How about a photo of the insides? Does it have a fuse you can read? (It's Sherlock time.)