The FIRST Program Guide - Issued June 30 to July 5th, 1941. The first two TV stations licensed for commercial broadcasting were New Yorks WNBT (which later became WNBC) and WCBW. They were both licensed on July 1, 1941. Earlier broadcasting was considered 'experimental'.
Definition of gage. 1  1 : a token of defiance; specifically : a glove or cap cast on the ground to be taken up by an opponent as a pledge of combat. 2  2 : something deposited as a pledge of performance.
In this test, the gage is normally used with either an M110-RM (5 MHz) or M112-RM (10 MHz) contact transducer. Typical Procedure: The waveforms below show simultaneous measurement of all three layers of a typical multilayer aircraft windshield using an M110 (5 MHz) contact transducer.