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THE STRONG "575" FOLLOW SPOTLIGHT Model 41000 is an AC follow spot
complete with lamphouse, igniter, power supply, optical system, and color boomerang. It is designed
for use with the 575 watt metal halide bulb, Strong part number 41102.
THE "575" LAMPHOUSE has a deep ellipse cold-coated metal reflector designed to
operate in a fixed position, with the bulb mounted horizontally in the lamphouse. The bulb is adjustable
in relation to the reflector to permit positioning on the reflector optical center line. The igniter is
contained in the base of the lamphousing.
THE SEPARATE POWER SUPPLY comes equipped with a three-wire AC line cord
terminating in a 125 volt (±10 volt), 60 Hz. plug that can be connected to an AC outlet, and draws
approximately 7 amperes from the line. The power supply also has two switches and a toggle type
circuit breaker. The circuit breaker must be in the "ON" or "RESET" position to energize the power
supply. The two switches are an "ON" switch and "OFF" switch. The lamp may be turned on or off by
use of the appropriate switch at the power supply or at the lamphouse.
THE IGNITER in the lamphouse requires a 237 V.AC open circuit pulse, provided by a
step-up transformer in the power supply, to ignite the bulb. After ignition, the power supply automatically
drops the voltage to the value required to maintain the arc.
THE ADJUSTMENT CONTROL for positioning the metal halide bulb is located behind
the cover panel at the rear of the lamphouse. This control mechanism permits focus adjustment of the
bulb in relation to the reflector and also allows the bulb to be centered both vertically and horizontally on
the optical center of the reflector.
THE LAMPHOUSE has a running time meter to indicate the number of hours the bulb
has been used. It also has two switches for the "ON" and "OFF" control at the lamphouse. The lamp
can be controlled from either the power supply or the lamphouse. To break the AC supply at the power
supply and lamphouse, open the circuit breaker on the rear of the power supply.
THE POWER SUPPLY is attached to the lamphouse by a cable assembly approximately
13 feet long, terminating in an MS connector for easy attachment to the lamphouse. This cable assembly
contains all the control wires for the operation of the lamphouse and power supply.
TWO BLOWERS are used in the follow spot system and operate from the 115 volt AC
supply only while the bulb is ignited. One blower is used to cool the lamphouse and bulb; the other, in
the lens mechanism, cools the color gels and lens system.
PREFACE
575/001
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