I have an old power supply thingy here, I bought it at a Goodwill store
a bunch of years ago.I am looking it over right now.It says on the metal
plate on the front,,,

Acme ACME Electric Corporation CUBA, NEW YORK VOLTROL MADE IN U.S.A.
TYPE T-8350 INPUT 115 VOLTS 50-60 CY. OUTPUT 6 AMP MAX.PATENTS NO'S
2009013 2061452

The device is HEAVY!, must have a HEAVY coil inside, I reckon.There is a
large round knob with a metal pointer underneath the knob and around the
perimeter of the knob, 70 80 90 100 100 (I did not mistype that, 100
100) 110 LINE 120 130

At the bottom left hand corner there is a toggle switch for ON OFF.In
the middle above the metal plate with the knob there is a meter/gauge
which says VOLTS A.C. 0 30 60 90 120 150.At the top right hand corner of
the device there is a round plug socket.
There is a handle mounted on top of the device.
I plugged it into a wall outlet.I think it works A OK.Of course it is
A.C.Voltage only.
cuhulin