Originally posted by Turnbull:
Sorry, Geoff, the scene was set in 1945. The transistor was first demonstrated on December 23, 1947. And as you pointed out, the first transistor radios weren't sold until late 1954.
That was from the same scene as Tom being told he was "out". The year was 1954 or 1955.
EDIT: Ooops, Geoff beat me to it.