The infancy of Empire

1)  1931  - First permanent television antennas were erected on
twelve-foot poles on the skyscraper tower.

2)  1936 - An arangement of poles and rods supported the three
triangular antennas of the second structure to be built.

3)  1938 - The third mast stood 35-feet high with ring-shaped
di-pole with video turnstile below.

4)  1946 - A 61-foot super-turnstile was erected when NBC
began trasnsmitting on channel four. 

RCA-Radio Age, April 1950  

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