"Dave Plowman (News)" wrote:

In article ,
David W.E. Roberts wrote:
All worked via a foot switch with a slider (rheostat?) for the uplighter
and an on/off switch for the reading lamp.

Unlikely to be a rheostat - a 150 watt one would get extremely hot. It
will likely be a 'conventional' triac dimmer with a slider pot rather than
the more usual rotary one.

And trying to measure the output of one of these with a meter is pretty
meaningless.

No reason why. Even if the meter is not true RMS you can usually get
a reasonable indication of a phase switched dimmer output with any
meter.


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