Initially, the station's range was officially a 40 kilometres radius of the Alexandra Palace transmitter—in practice, however, transmissions could be picked up a good deal further away, and on one occasion in 1938 were picked up by engineers at RCA in New York, who were experimenting with a British television set.
What example shows it would be possible to communicate beyond the stated range?
on one occasion in 1938 were picked up by engineers at RCA in New York