From: utzoo!decvax!harpo!seismo!presby!burdvax!floyd Newsgroups: net.misc Title: Re: A question about records speeds Article-I.D.: burdvax.559 Posted: Sat Feb 12 02:29:10 1983 Received: Sun Feb 13 04:38:46 1983 References: arizona.1325 yale-com.866 The 15 inch discs were used primarliy to get more programming onto a single disc in order to minimize interruptions. Not too long ago, if not any more, you could buy broadcast turntables with 16-inch platters and ~14-inch tonearms. The selectable speeds were 33, 45 & 78.