Some older terminology explained
EWT= Eastern War Time the forerunner of Daylight Saving Time. It was thought that if factories took advantage of the earlier rising of the sun in the summer, less electricity for lighting would be needed. This was back when factories had lots of windows and skylights.
The following is an explanation of the various colors of the NBC networks:
Red & Blue Networks
RCA spent $1 million to buy WEAF and Washington sister station WCAP, shut down the latter station and merged its facilities with surviving station WRC, and announced in late 1926 the creation of a new division known as The National Broadcasting Company.[4] The new division was divided in ownership among RCA (fifty percent), General Electric (thirty percent), and Westinghouse (twenty percent). NBC launched officially on November 15, 1926.
WEAF and WJZ, the flagships of the two earlier networks, operated side-by-side for about a year as part of the new NBC. On January 1, 1927 NBC formally divided their respective marketing strategies: the Red Network offered commercially sponsored entertainment and music programming; the Blue Network mostly carried sustaining or non-sponsored broadcasts, especially news and cultural programs. Various histories of NBC suggest the color designations for the two networks came from the color of the push pins NBC engineers used to designate affiliates of WEAF (red) and WJZ (blue), or from the use of double-ended red and blue colored pencils. A similar two-part/two-color strategy appeared in the recording industry, dividing the market between classical and popular offerings.
On April 5, 1927, NBC reached the West Coast with the launch of the NBC Orange Network, also known as The Pacific Coast Network. This was followed by the debut on October 18, 1931, of the NBC Gold Network, also known as The Pacific Gold Network. The Orange Network carried Red Network programming and the Gold Network carried programming from the Blue Network. Initially the Orange Network recreated Eastern Red Network programming for West Coast stations at KPO in San Francisco. In 1936 the Orange Network name was dropped and network affiliate stations became part of the Red Network. At the same time the Gold Network became part of the Blue Network. NBC also developed a network for shortwave radio stations in the 1930s called the NBC White Network.
