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On 8/24/2011 9:09 PM, Roger Kulp wrote: > Two links that might be of use Unfortunately they are not of much use in this situation. > > http://www.videointerchange.com/vintage_78s.htm#Metal%20Records > > Tracking force and stylus mentioned here. This is discussing what you were told to do back in the 1930s if playing them on a wind-up acoustical machine with a tracking force of 3-4 OUNCES, which is about 85 to 120 grams. Kurt is playing these on ultra-modern equipment with tracking forces of about 3 grams. > > http://www.stevehoffman.tv/forums/showthread.php?t=129975 > > The cutting machine is discussed here. > > Roger > This machine is not at all what was used to EMBOSS uncoated aluminum back in the early to mid 1930s. This machine shown is designed for cutting COATED lacquer discs. It just happens to be branded Speak-O-Phone but is 5 or 10 years after the use of uncoated aluminum. Mike Biel [log in to unmask] > ________________________________ > From: Kurt Nauck<[log in to unmask]> > > > Brian and I are working our way through a stack of mid-30s Speak-O-Phone aluminum recordings. Most of these appear to be air checks of dance bands and vocalists. > > Condition is pretty good on most of them, but we're having trouble finding the ideal stylus to play them with. Best results seem to be obtained with a standard LP stylus. > > Does anyone have any experience with these? (And yes, we're riding the groove, not the landing between them.) > > Kurt Nauck