[78-L] VTMC Strobe Disc

[Sam Hopper]

Stroke discs can be downloaded from:
 http://www.78rpmcommunity.com/folder/13/stroboscopic-discs




----- Original Message -----
From: Royal Pemberton
Sent: 11/05/11 10:38 AM
To: 78-L Mail List
Subject: Re: [78-L] VTMC Strobe Disc

 Would it work as a jpeg image on Photobucket or such like? On Fri, Nov 4, 2011 at 11:05 PM, Michael Biel <mbiel at mbiel.com> wrote: > During the discussions about how 78.26 rpm was chosen, I have debunked > the unsupportable idea that it was the result of a gear-ratio > calculation because all turntables at that time had continuously > variable speed governors. The answer was, of course, the strobe disc. > During a discussion I was asked once whether I had PROOF that Victor > Talking Machine Co. used a strobe disc, and I said that I had once seen > one and that Dennis Valente's company sold a reproduction of the strobe > side of the disc. > > Well, now through the kind auspices of Tim Fabrizio, I have a Victor > Talking Machine Co. "60 Cycle Stroboscope Disc for testing speed of > talking machine turntables". The speed it mentions in the instructions > is 78 revolutions, not 78.26, but a 78.00 strobe disc is impossible with > 60 cycle lighting. 78 was always the simplified speed cited, never > 78.00. It is Part 18436, and it would be great if it would be possible > to place this part number in the chronology of Victor parts manufacture > to date it. It is obvious that it is pre-RCA, so it is prior to 1929 > but could be much earlier. > > I have scanned both sides of the disc, and if you wish it to print for > yourself, contact me off-list. I would also like to post it on a > graphics site as well. > > Mike Biel mbiel at mbiel.com > > _______________________________________________ > 78-L mailing list > 78-L at klickitat.78online.com > http://klickitat.78online.com/mailman/listinfo/78-l > _______________________________________________ 78-L mailing list 78-L at klickitat.78online.com http://klickitat.78online.com/mailman/listinfo/78-l