Motion Picture Herald (Nov-Dec 1934)

December 15, 1934 Motion Picture Herald 21 have myself seen it time, time and again, and in no case I ever have heard of has any union taken any effective steps to put a stop to such procedure. Well, gentlemen, you have reaped, and still are reaping, the logical fruits of such procedure. It is too bad. There should be two men in modern projection rooms, but two men, both of them doing nothing, very naturally does not appeal to the exhibitor. To projectionists in those theatres still having two men, I would once again suggest that one man stay at the working projector, keeping his eye and his mind on the work, except in some rare emergency which demands attention of both men momentarily. To those unions that have succeeded in retaining the two-man projection room I would 'umbly suggest that means be taken — very effective means — to prevent their members from reading papers, building radio sets, etc., while on duty, compelling one man to be right on the job beside the working projector while it is working. DIAGNOSING RASPY REPRODUCTION RAY BARTLET^ an exhibitor in Artesia, N. M., writes, "We have RCA sound equipment, now four years old. Up to about one month ago the sound was perfect. Then a raspy, tin pan sound developed on all medium and high notes, especially violin music and soprano voice. Have replaced all tubes, photocells, etc., but Mr. Trouble still is camped on our trail. It doubtless is in the amplifier or loudspeaker, but we have gone over both to the best of our ability, without effect. Will you be good enough to tell us what you believe the seat of the trouble may be? Our RCA service contract expired some months ago and we are 'on our own'." Diagnosing a sound equipment trouble is something like a doctor attempting to make a diagnosis at long distance. It is a very hard thing to do ; and there is not sufficient information contained in the letter to permit of making a sure-fire deduction. I have myself examined into the matter and have submitted it to a very competent sound engineer. The conclusion is that — First : Symptoms are entirely consistent with the possibility of flutter in both projectors, which is easily tested by using a different source of pickup, say a microphone, or better still, a non-sync phonograph. If neither is in the theatre, either may be borrowed from the nearest radio store and wired to the input of the first voltage amplifier. If the input impedance of the amplifier is not known, phone the nearest RCA station for it. However, an exact impedance match is not necessary for the temporary test. If the non-sync sound does not show the same truble, flutter in both projectors is the probable answer. Second : There is a possibility of an opencircuited by-pass condenser in the amplifier. The by-pass condensers are shorted across the B-supply lines to each tube. An open circuit in any of these might cause this trouble. Check with an a.c. source and a 'The reproduction necessarily had to be faultless'"' ^ PFNTURY OF PROGRESS i^ternItional exposition CHICAGO 1934 October 3, 1934 wright-deCOSTer, inc. St Paul, Minnesota. Attention Mr. D. H. Wr.ftht Gentlemen: ^^^^^ Wri^ht You will be '"'^"''^^ *oven even more sucDeCoster , speakers have P^ove" ^ ^ „ cessful thfs year m """y""" j have used your ProSress than they did exceptional tone Model 309 %",^p,^'d„c,ion%nd rugged Quality, faithfulness ^^l'^" (eel that Wnghtrependability have made me ^feel ^^^^.^^^ ?af be'u^se^d-'fn'w^rU^M.us typ. 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