Things you find in barns, part 8.

Unit Oscillators: ”[These]Unit Oscillators are
general-purpose radiofrequency power sources covering the ranges of 250 to 960 Mc and 180 to 600 Mc, respectively. These members of the con-
venient Unit Instrument line can be used to drive bridges, slotted lines, impedance comparators, and other measuring equipment. Used wtth a volt-meter and attenuator, they provide accurately known output voltages for the testing of receivers. (…)” Operating Instructions for the TYPES 1209-C AND ·CL UNIT OSCILLATORS, GENERAL RADIO COMPANY, June 1966.

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