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November, 1935
The Journal of the Associafioji of Cine-Technicians
57
A New Spotting Opaque
We have tested a red liquid Opaque sent us by Messrs. Johnson & Sons, the photographic chemists. This is a first-class material for blocking out purposes, and spotting pin holes ; it flows easily from brush or draughtsman's pen, adheres to glass or emulsion, dries quickly and is quite opaque. Diluted with a httle water it can be used to give high lights and cloud effects on still portraits, etc. ; it can be removed by immersion in water, although it will not crack or shift from the negative. The containers which hold 1 oz., 6 oz. or 12 oz. permit the hquid to be well stirred. When dry, the opaque can be worked with pen or knife, without cracking.
May A.C.T. suggest that this opaque be made in black, as its adhering quahties and deadness to reflection would make it useful for camera and lens repairs.
K. G.
The Film Society
Reduced Subscription Rates for Technicians.
The Film Society is starting on its eleventh season which this year will be held at the "New Gallery." As usual, reduced rates of subscriptions are available to film technicians employed at a salary not exceeding £\0 per week. One seat for each of eight performances may be obtained upon payment of 17/6. Full details may be obtained from Miss Mary Brown, Secretary, Film Society, 56 Manchester Street, W.l.
Emergency Fund
The General Council of A.C.T. has decided to start an Emergency Fund which will be used mainly for benevolent and legal purposes, and any other extraneous expense which cannot ordinarily be charged to general income.
Contributions will be welcome and all sums received acknowledged in the Journal.
As we go to press the first donation has come to hand : Giinther Krampf, ... ... £5 0 0
We are very grateful for such an excellent lead from an ace technician.
Audio Frequency Signal Generator {continued from page 54.)
After insertion of new valves and batteries a re-calibration of the voltmeter may be necessary. Instructions for doing this are given with the instrument.
Uses.
The use of this instrument for Amplifier calibration is obvious. A thermo-ammeter with transformer or a valve voltmeter can be used to check the output.
Other uses, such as Loud Speaker measurements ; measurement of Inductances and Capacities, Filter Curves, Equalisers, etc., will be obvious to technicians.
Power Box.
An additional Power Bo.x can be supplied to give an undistorted wave of 5 volts to a 500 ohm line for line measurements with the necessary input measuring instruments incorporated.
This instrument can be examined by any studio technician who may be interested, at the showrooms of Films & Equipments Ltd.
RCA PHOTOPHONE
''HIGH FIDELITY
RECORDING
AND
REPRODUCTION
f f
THE BEGINNING AND END of a PERFECT SOUND FILM
RCA PHOTOPHONE LTD., Electra House, Victoria Enibanliment. London, W.C.2
Teieplione : Temple Bar 2971