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cannot be done on every projector. There is also a motor-driven rewind, which obviates the usual changing of spools.
Illumination is from a standard 750-watt pre-focussed projection lamp, which can be changed when desired in a matter of seconds. All the elements of the optical-system are precisionmade and permanently spaced and aligned. There are no mirrors, and nothing to get out of adjustment. The Victor shutter is designed for minimum light-interruption, and makes possible a clear, flickerless picture of brilliant intensity. A coated 2" F.1.6 projection lens is supplied with the machine as standard.
Another interesting feature is the stationary sound-drum, and two flywheels instead of one are employed before and after the scanning-point to keep the sound-pitch even. The sound-lens, of great focal depth, provides equally sharp response from either monochrome or coloured films.
The mechanical filter is of the flat-spring type, and is unaffected by time, temperature or humidity, and requires no oiling or adjusting.
Light for the sound-optics is provided by a new type exciterlamp. It is many times more brilliant than the usual type, and is rated for a 100-hour life instead of the customary 50 hours. The result is "cleaner" sound with less background noise, and also a longer photo-cell life, though the latter is already provided for by an improved compensation for mainsvolt age variations.
Power output and frequency from the amplifier is adequate for powering four i2"-speakers. The amplifier is ruggedly constructed and built for strength, and the valves ventilated and instantly accessible.
The Victor is designed to work on no volts A.C., but as voltages differ so much, the makers have introduced a new stepdown transformer as an integral part of the equipment. Its use, of course, being to lower the voltage to a steady no for the projector when working on a mains supply of 200 to 250 volts.
Housed in an attractive leatherette carrying-case, is the special 12" permanent-magnet dynamic loud-speaker, efficiently baffled and protected against moisture and other damage. It is equipped with an impedance matching-switch for use with additional speakers up to four in number. A convenient reel-board and rack accommodates the 75' speaker-lead within the speaker-case.
Altogether, the Victor is more than a welcome addition to the
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