ebay power supply

[Tom]

Hi John,

Yeah, basically. Plug it in and it'll whirr away at 42.7V happily.

I think they were originally intended to be used by some sensitive rack-mounted equipment, which needed really close voltage control somewhere between 50V and 56V. The exact voltage within the 50V to 56v range can be adjusted with a control voltage to pin28. I guess some closed-loop control (in a different box) would increase the control voltage slightly when the unit was under peak load, to keep the voltage seen by the sensitive equipment stable.

We're all using them in "cheap whacking great power supply" mode, without any need for the regulation voltage on pin 28. I've just bought 2 more (in case they run out! one for the lathe and one spare).