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Old 19th Aug 2017, 4:04 pm   #10
Join Date: Jun 2015
Location: Biggin Hill, London, UK.
Posts: 2,708
Default Re: Any Acorn A3000/10/20 Users here?

I'm not sure about this machine, but a lot of switch-mode PSUs do not like being run up on a Variac. Remember a switch-mode PSU approximates a constant power load and will draw more current at a lower input voltage.
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