In article ,
Dave Plowman (News) wrote:
In article ,
Andrew Mawson wrote:
"Dave Plowman (News)" wrote in message
...

In article ,
Uncle Peter wrote:
There's also the problem of being able to control the level of the
lamps.

Why would that be a problem?

How would you control the level of DC lamps in the '60s?


Salt bath was popular in theatres in the late 50's if a rheostat worked
out too large

Must have been interesting controlling the levels from the lighting
control room? A series of taps rather than faders?

no, you had chains dangling in the salt bath and pulled them in or out
depending on the lightiing level. Usually done with a geared machanism
rather than bare hands.

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