Edison acoustic discs reliably run at 80 RPM, but you can't really trust numbers on sleeves for other makes. Victor, for instance, stoutly urged that its records be played at 78, but most after the earliest years and for at least a few years into the electric era were recorded at 75 or 76; the very early ones could dip well below that. Actually, I do have one Victor red seal that states a speed of 80 on its label. Naturally, it actually plays at 78! I have Edison Bell laterals from England that were recorded at 84. Pathé helpfully specified that its center start records (the ones with etched labels, vertical cut) should be played "between 90 and 100 RPM." And so on. Finding the correct speed always turns into an adventure.Herderz wrote:Thanks drh for the tip, I have seen these used of some of the videos I have watched. Yeah some of the record sleeves I have say to play the records at 80 rpm instead of 78. I like using the card strobe because I stick it on each record and can fine tune the speed with each record. It does not work to good with the DD records some are to thick and there is no room left on the turntable shaft.
Incidentally, I just a night or two ago read that very late Edison discs, those after 2/4/1929, were recorded at 78.8. See p. 29 of Copeland and Sherman's Collector's Guide to Edison Records. I've not tried to verify that statement personally, but I assume it's authoritative.