Radio News Sylvania Ad, September, 1947
During 1947, Sylvania ran a series of colorful ads on the back cover
of Radio News magazine, touting their "Lock-In" tube sockets. This ad
explains why the lock-in tube socket was especially effective for FM
receivers. Other ads in the series described why lock-in tubes were
at home on the rails (railroads), in the air, on the sea, on the
road, in television equipment, and so on. The first ad
in this series was published in February, 1947.
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