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I just happened to have done a couple of these recently (cira 1942) I got 3 passes with various styli running at 1/2 speed before I began encountering problems. I considered myself lucky! They were both recorded under-speed (around 73 RPM, as best as I can determine), and have significant rumble (although fairly quiet surface noise when using a stylus that rides towards the top of the groove wall). Scott D. Smith Chicago Audio Works, Inc. Quoting David Lewis <[log in to unmask]>: > Yes - I am familiar with DuoDiscs. These are cheaply made, instantaneous-cut > discs. The first "homemades" I ever owned were a pair of these given to me > by a family friend thirty years ago. What the correspondent calls "vinyl" is > actually the lacquer coating on the outside of the aluminum center, and if > it is already peeling there is little hope for it. > > This is a pity - Duodiscs have fairly quiet surfaces for homemades, but it > appears most of the ones I see nowadays are on their way out - it appears 90 > per cent of them are flaking off. And these always seemed so durable, unlike > steel-base Carr-O-Tones and others which rust and usually prove unplayable > anyway. As there are no established standards for handling these records, it > is hard to know what to do to preserve them. The standards may well arrive > too late for most DuoDiscs. > > My advice - record the non-flaked-off portions at a very slow speed 2 or 3 > times, speed up the results and edit what's left together. You may get > different grooves to play on different passes. > > David N. Lewis > Assistant Classical Editor, All Music Guide > > "Contemporary composers, and at least a considerable number of them, explain > what system they used, in what way they arrived at something. I do not do > that. I think that the matter of the way by which one arrived at something > is, for the listeners, unimportant. What matters is the final result, that > is the work itself." -Grazyna Bacewicz, 1964 > > -----Original Message----- > From: Association for Recorded Sound Discussion List > [mailto:[log in to unmask]] On Behalf Of Joel Ackerman > Sent: Thursday, February 23, 2006 11:47 PM > To: [log in to unmask] > Subject: [ARSCLIST] Question re DuoDisc records > > Am asked the following question: > > Are you familiar with those "DuoDisc" type records? They have an aluminum > center (substrate) and a thin coat of vinyl (I think) on top of the > aluminum. I believe they are records people made home recordings on. > Anyway I have two (or three) of them and the vinyl is peeling off the > aluminum. I was wondering if you knew anything about, perhaps, repairing > the peel? > > Looking at photos, it appears that the vinyl is coming apart - cracking and > heading towards eventual peeling off,. > > Suggestions welcome. > > Joel Ackerman > Scott D. Smith Chicago Audio Works, Inc.