Richardson's handbook of projection (1930)

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HANDBOOK OF PROJECTION FOR The Super Simplex Result of position of rotating shutter 1253 Silent and sound apertures 1256 Altering the optic axis of projection 1257 Changing projection lenses 1258 Adjusting intermittent movement "1262 Fixed focus lens clamp 1265 New RCA Equipment Five different types of Photophone equipment 1289 Daily tests 1299 A Practical Slow Re winder Gearing Description 1305 Locating Trouble in Sound Apparatus No sound 1309 Low volume or poor quality 1311 Checking the photo-electric cell 1318 Noisy B batteries 1320 Soldered connections 1322 Testing amplifier parts 1325 Microphonic tube noises 1327 Dead amplifier 1328 Shorting out resistance 1338 Condenser noise elimination 1344 Trouble at 90 Volt tap 1346 When an output transformer goes bad 1347 The 10 megohm leak 1351 Testing for ground in .006 condenser 1352 Test for continuity with head phones. . . 1353 Exercise caution 1371 Sprocket, Film and Splicing Diagrams Figures 474-478 inclusive 1364-1368