Parks Hall put 3 speed Russco Cue-Masters (idler drive) with the pretty Micro-Trak 303 wood tonearms into WSIM, Jim. Stanton 500 cartridges which could withstand the backcuing abuse. 1/4 turn to get from stop to full speed so you left no dead air; the original high-torque turntables, based on the tried-and-true Gates/Harris broadcast tables from the 50s and 60s with better specs. We played all of our music off of them; the cart machines were mono only for the commercials.
The adult contemporary station where I worked after that had the ancient Gates tables with the big honkin' arms that Andrew likes. When the Adlai Stevenson family bought the big FM stick from Ted Turner in 1977, they kept me and a couple of other jocks and we got to see them install Technics SP-10s with the Micro-Trak 303 arms as well to go with the pair of ITC 3-deck cart machines which played the music in rotation along with the commercials. Turntables in that operation were only for the album cuts that came up three times an hour on the format clock.