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Cambridge Town Hall |
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The Cambridge Town
Hall is a multipurpose community hall that was built in 1907 and is of
significant historical importance. Located in the heart of the Cambridge
township, about 24km Southeast of Hamilton City in the North Island of
New Zealand, the building comprises of the main hall and stage, several
side rooms and a kitchen. The town's visitor information centre is housed
in one of the attached rooms.
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A major project in
2001 to upgrade the building included seismic strengthening, rewiring,
redecorating, upgrading of the stage facilities and exterior landscaping.
Adena provided theatre consultancy services, supplied the stage lighting
equipment and co-ordinated specialist theatre contractors to install the
new house curtain and rigging for the new FOH spot bar.
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This photo
shows the newly redecorated auditorium and the new house curtain. |
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The new
FOH spot bar can be seen below the ceiling. The spot bar,
designed and manufactured by Adena, is prewired with nine
dimmer circuits and finished with a white powder-coat paint. |
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This photo
is taken from the stage looking back towards the camera location
for the photo above. |
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The imitation
windows are lit internally to produce the desired effect.
They can be opened to provide a place to hang a theatre spot
light for stage lighting purposes. |
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The auditorium lighting
consists of two separate systems to provide the range of flexibility required
for such a multipurpose venue. The main system includes the centrepiece
and wall lights, all of which are fitted with incandescent lamps controlled
by Theatrelight Moodset dimmer units. The Moodsets provide three preset
levels and off with an automatic ten second fade between levels. The second
system comprises of metal-halide downlights recessed into the ceiling.
These downlights are switched on when high levels of light are required. |
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The new
house curtain (photo left) is designed in the same "waterfall"
style as the original curtain. The new curtain was supplied and installed by John Herber Ltd.
The original
ornate metal panels surrounding the proscenium arch are a
carefully preserved feature. |
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As the
stage has no fly tower (the grid is about 1.5 metres above
the proscenium arch) the house curtain is raised by lifting
from the tail batten with the fabric stacking as it rises. |
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The original mechanism
for raising and lowering the curtain comprised of sixteen wire ropes,
numerous pulleys and a hand winch, all of which had to be replaced to
correct reliability and safety concerns. The new mechanism is a completely
new development by John Herber's that eliminates most of the wires and
pulleys and the need for a winch. Operation of the curtain now uses the
familiar hand-line and rope brake typical of many counterweighted theatre
systems. |
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The new electrical
installation (photo below) is designed for optimum user convenience and
safety. Located in the prompt side corner all essential controls are at
the stage managers finger tips. The manila hand-line and rope lock for
raising and lowering the house curtain can also be seen next to the edge
of the curtain. |
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The main
components of the electrical installation (photo left) are... |
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- Auditorium Dimmers
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- Stage Lighting Dimmers
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- Auditorium Distribution Board
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- Stage Lighting Distribution Board
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- Work Light
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- Stage Lighting Control Desk
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- Wings and General Lighting Switches
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- Auditorium Lighting Dimmer Controls |
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The stage lighting
dimmers are controlled by a Theatrelight Starlet DMX control panel. The
Starlet provides the functionality of a 12-channel 2-preset manual lighting
desk with a dipless crossfader in a very compact unit. For this installation
we mounted the Starlet onto the inside lid of a standard lockable electrical
enclosure to provide a level of security and dust protection. The enclosure
opens downward to provide a convenient "desk" for the Starlet
to be operated from. |
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The main
switch for the dimmer packs, a power point for the Starlet's
plug-pack and the DMX input to the dimmers are mounted in
the top right hand corner of the enclosure. |
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A hole
to enable DMX cable entry is provided in the bottom of the enclosure
so that other DMX controlled equipment can readily be connected whenever users wish to do so. |
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Two Theatrelight Rack-Pack
12-channel DMX dimmer packs are permanently wired to socket outlets on
the FOH spot bar and adjacent to the on-stage spot bar positions. Most
of the dimmer channels are wired to socket outlets at more than one location
to optimise the flexibility of the installation without installing an
excessive number of dimmers. |
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When being controlled
by the Starlet, the DMX addresses for the dimmer packs are set to run
both packs in parallel to give twelve controlled channels from the FOH
spot bar to the Cyc bar outlets. When
the dimmer packs are set to concurrent DMX addresses twenty four control
channels are spread from the FOH spot bar to Cyc bar outlets and any DMX
lighting desk can be used to control the system. A spare three phase 32-Amp
socket is provided to allow an additional dimmer pack to be brought in
by hall users when necessary. |
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| Revised: 14-Jan-2011 |
Copyright (C) 2011 Adena Limited |
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