There is an ingenious mechanism behind that single central knob, much of which is devoted to making the dial pointer move from one channel-indicator window to the other. Turning the tuning knob clockwise, a collection of cams and levers make the pointer move horizontally from channel 2 to 6, in typical "slide-rule dial" fashion. As the knob goes through the center of its range, the pointer drops out of sight, and a switch turns the unit off. Continuing clockwise rotation, the power turns on, and the pointer appears again, this time in the right-hand window, and moves more-or-less smoothly from channel 7 to 13. The tuning slugs move in and out of their coils in the usual way, as in the 101-50. Considerable care was taken to produce good gain flatness across each TV channel, with transformer coupling in and out of each tuned circuit. Anchor was proud to publish gain-bandwidth curves of its boosters -- unique in the industry.

For some reason, model 101-75s are not often seen today, though the older 101-50 and the fancier 101-100 are relatively common.