Quote:
Originally Posted by Steve McVoy
. RCA used a mechanical camera for their 120 line tests in 1934, and it wasn't until the end of 1935 that RCA's electronic camera was good enough to use in field trials starting in 1936.
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RCA didn't use a flying-spot camera (120 lines) after 1931. The 1934 tests were not the first using an iconoscope camera and were in fact 240 line.
http://earlytelevision.org/rca_1932.html