Roseland
Theater Projection
Booth Page 2, RCA Amp and Field Coil Speaker
The carbon arc lamps use a selenium
rectifier
to convert AC to the low voltage, high current DC used by the
arc.
This is the rewind bench and film
storage rack.
Each reel of film holds around 20 minutes...the entire movie is
shown by changing back and forth between the 2 projectors. 35
millimeter projectors do not have a rewind feature like home-type
projectors do, so the film must be rewound in the
octagonal-shaped machine. The cover lifts off to load the reels,
and a motor rewinds the film. The machine is covered because it
dates from the days of nitrate film, which was extremely
flammable. The covers would prevent a fire from getting out of
hand if the film ignited.
Here are the carbon rods burned in the
projector and tools used to install the rods in the lamphouse.
The arc is lit by touching the rods together, and then a motor
helps maintain the arc gap as the rods burn. Each set of arc rods
will last a maximum of about 50 minutes before a new set needs to
be installed.
Some old equipment including a carbon lamphouse and RCA amp. John was
able to get the amp and we are now restoring it.
RCA Audio equalizer and other old equipment in a storage room at the
Roseland.
Close up of the RCA Amp.
Read the story of
the Amp Restoration.
Field Coil Speaker at the Roseland.
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