Electrical Projects Not only is it important to know what the line voltage is, but it is helpful to have some way of compensating for any fluctuations. For this purpose, a variable ac power supply can serve the repairman well. This device features a metered knob for adjusting output to the voltage required (normally 0- 140V). A receptacle mounted on the side to take a standard three-prong plug allows direct connection to an appliance without the inconvenience of screw terminals. Thus, whatever the level of the line voltage is, it can be adjusted to a 115V Output suitable for making voltage checks of appliances in accord with factory specifications.

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August 20, 2008