IEEE Power & Energy Magazine - January/February 2017 - 78
lighting boards most often were manufactured so as to allow only two, five,
or ten cues to be set in advance, since
there still were limits to the number of
potentiometers that could be provided.
The high current portions of a thyratron-reactor dimmer circuit could be
located in any out-of-the-way space,
such as down in the basement near the
main electrical service. This included
the saturable core reactors themselves,
the remotely operated line contactors,
and the panels containing the thyratron, kenotron and phanotron tubes.
General Electric
figure 3. The GE dimmer board backstage at the Albany, New York, Palace
Theatre. (Photo courtesy of Thomas. J. Blalock.)
In the early 20th century, GE became involved with the manufacture of switchboards for the control of stage lighting.
These indeed were just switchboards,
consisting of open knife switches and
fuse holders mounted on a thick slate
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