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Author Topic: New Lenard Cinema 4 way active Speaker/ Amp Michael Schaffer "Where is the Boardwalk Hotel?" Posts: 4143 From: Boston, MA Registered: Apr 2002 posted 07-25-2006 12:35 AM                        quote: So that gives the Aussies 3 of the BEST: ... ... The Best Sound Reader ?  |  IP: Logged Paul Trimboli Master Film Handler Posts: 274 From: Perth Western Australia Registered: Dec 2002 posted 07-25-2006 04:34 AM                     Michael I belive that Ian is refering to that fact that reverse scan is an Australian invention, so by the best sound readers he means the Raycophone soundheads. Is that what you were refering to Ian?  |  IP: Logged Robert Throop Master Film Handler Posts: 412 From: Vernon, NY USA Registered: Jun 99 posted 07-25-2006 08:10 AM                     quote: Paul Trimboli reverse scan is an Australian invention Did the Raycophone predate the WE TA7400? That was reverse scan and introduced in 1936. Bob  |  IP: Logged Paul Trimboli Master Film Handler Posts: 274 From: Perth Western Australia Registered: Dec 2002 posted 07-25-2006 09:02 AM                     The Raycophone system was first publicaly demonstrated on the 10th of June 1929 and then went on sale. By 1938 375 cinemas in Australia were running Raycophone sound equipment. The cost of a Raycophone reproducer cost 1700 pounds compared to the US systems that cost 11 000 pounds. I have no idea what became of Raycophone  |  IP: Logged Phillip Grace Expert Film Handler Posts: 164 From: ACMI. Melbourne. Australia. Registered: Mar 2004 posted 02-07-2007 03:53 AM                     The early Raycophone soundheads used a conventional front-scanning system and a fixed sound gate similar to the W/E 1A units. Their first cinema sound system was a universal base device for sound on film and sound on disc reproduction, adaptable to various makes of projector. There were many models of soundheads - add-on units and complete pedestal systems available. Their portable projectors used front-scanning soundheads from their introduction in (I think) 1932. The soundhead used on the J3 projector (1937) is also front-scanning. There is an Australian patent, assigned to Raycophone, describing the rear scanning rotary-stabilised soundheads with which most Australian operators would be familiar. I dont have it to hand at the momement, but recall that it pre-dates slightly the introduction of the RCA PS24 (1936) and W/E 7400 (1937) soundheads, which were the first in the U.S. to ovecome the restricitions of the Tri-Ergon patents. The optical soundtrack is scanned with the film overhanging a kinetically stabilsed rotating drum, in the form commonly found today. I think the first Raycophone sound system to employ this type of soundhead was known as "Panaphonic". There seems to be virtually no technical literature available on Raycophone. I would love to hear from anybody who has any. Cheers.  |  IP: Logged Robert Throop Master Film Handler Posts: 412 From: Vernon, NY USA Registered: Jun 99 posted 02-07-2007 08:46 AM                     quote: Phillip Grace it pre-dates slightly the introduction of the RCA PS24 (1936) I believe the PS24 was introduced in 1932. Radio City Music Hall opened with PS24's in December 1932. Bob  |  IP: Logged Phillip Grace Expert Film Handler Posts: 164 From: ACMI. Melbourne. Australia. Registered: Mar 2004 posted 02-07-2007 11:33 PM                     Hi Robert. I'm going from my memory of a series of 3 articles in the SMPTE journal from about 1954, for the date of the introduction of the PS24 soundhead, so am interested to hear that they may indeed be earlier. The SMPTE series was reproduced in Fielding "A Technological History of Motion Pictures and Television". The PS24 was front-scanning, while the 7400 was rear-scanning, so the question about the invention of reverse scanning remains. I have an Altec service bulletin somewhere on the PS24, so I'll try to dig that out for further reference. Cheers. Phil.  |  IP: Logged

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