First, why are there no
safety cables on those fixtures? Why are the unused units just laying on the
catwalk where they could easily be knocked off?
The units in question are
Electro Controls, but are not Parellipspheres, as every one of those used an axially mounted lamp with the cap protruding out the center of the back.
From the
Photometrics Handbook: (An invaluable tool, though incomplete in many regards.)
Doubtful: If the fixtures use an Ext.
Mogul End Prong, PAR64-type lamp, they are #320X. (A very rare
fixture, that personally I don't understand. Using a
PAR lamp in an
ERS just doesn't make sense to me. See this thread:
http://www.controlbooth.com/forums/lighting/5916-electro-controls-3201-3214-ers.html .)
Also doubtful: If the fixtures use a Mini-Can.
Screwbase, EVR-type lamp, they are #3345. (Since this is a 500W max.
fixture, it's unlikely it would be used from an
FOH catwalk.)
Most likely: If the fixtures use a
Med Prefocus, (the
book erroneously identifies this as also a Mini-Can.
base) EGJ-type lamp, they are #3365, and can be any one of six
lens configurations: one 6x6 step, two 6x9 PC, two 6x12 PC, two 6x16 PC, two 6x20 PC, and one 6x8 step. [Nearest unit in picture "catwalk3.jpg"].
The
unit in picture "catwalk4.jpg" is definitely a model#3366, which could have a
lens train of two 6x9 PC, two 6x12 PC, or one 6x6 step lenses. (Again, due to its location, I suspect 2x 6x12.)
The fixtures were probably delivered in the mid-1970s.
The single
conductor white, black, and green cords feeding each
fixture do indeed contain
asbestos, which is the best reason for removing them from service and sending one to me for the Control Booth museum.
The
asbestos can be abated, the fixtures rewired, and new sockets installed, but the results will still be far inferior to a modern
ERS.