Experimental broadcasts, the Post Office ruled, had to be individually authorized.
In 1927, five years before he exiled himself from Germany in advance of the Nazi putsch, Benjamin began a series of experimental broadcasts on this new medium.
The young engineers also built a transmitter and made experimental broadcasts to amateur wireless enthusiasts, tech savvy young members of the Radio Society of Great Britain who had assembled their own equipment.
For instance, television took more than three decades to become a mass medium in the United States from the first experimental broadcasts in the late 1920s to widespread acceptance in the 1960s.
But manufacturers are likely to want to offer 8K screens by 2020 when NHK aims to begin its first experimental broadcasts in the standard.
It will begin experimental broadcasts with 12 channels in April 1997 and increase them to 150 channels by the time full broadcasting begins in 1998.
Unlike commercial networks dependent on advertising revenue, PBS had the flexibility to broadcast an experimental program that challenged audiences without pressures from advertisers that preferred to sponsor comfortable, traditional content.
In 1951 the Journalism School conducted an experimental fax broadcast.
While Berle had first appeared in an experimental TV broadcast in Chicago in 1929 (seen by a dozen people, by his estimate), the most mass of mass media was still in its infancy when he grabbed its spotlight nearly two decades later.
Later that year, the first experimental 3DTV broadcast was attempted on the Los Angeles channel KECA with a science fiction programme called Space Patrol.
