Commercial Transistor Radio
Supplying Transistors for First "Pocket Size" Radio
(October 18, 1954) - TI's part in the production of the first commercial
transistorized radio receiver will be announced beginning today
in newspapers throughout the country.
"pocket size" radio has four TI transistors. It also uses
a TI subminiature output transformer.
transistors - technically known as n-p-n grown junction germanium
triodes - are made in the Semiconductor Products Division. The transformer
is a product of the Components Division.
application to the new radio receiver accounts for a large part
of the increased production and employment in the two divisions
in recent weeks. The Apparatus Division has also had a hand in the
tiny radio, having worked on engineering problems and the machining
and fabricating of models for the plastic case.
receiver is being assembled and marketed by the Regency Division
of Industrial Development Engineering Associates, Inc., Indianapolis.
It will be available this week to the public through sales outlets
in Los Angeles and New York City. When production permits, it will
be sold in cities throughout the country. For competitive reasons
it was decided to keep the development of the radio, including TI's
part in it, "under wraps" until the unit was ready for
radio receiver measures 5 x 3 x 1 1/4 inches - the smallest set
commercially available - with the semiconductor devices themselves
occupying less than 1/10 of a cubic inch. The "pocket size"
is a significant achievement since it includes a high fidelity,
high volume speaker and a single battery supply as well as all associated
receiver circuit components.
at radio frequency with the germanium transistor is sufficient to
permit a combined mixer-oscillator stage. Only two intermediate
frequency stages are required and, following a germanium diode detector,
one audio amplifier stage. Audio volume fidelity and reception range
are the equal of or superior to that of the small vacuum tube-equipped
introduction of this first mass production item to use the tiny
transistor to replace the fragile vacuum tube leads the way for
the long-predicted transistorization and miniaturization of many
other mass production consumer devices. TIers can justly be proud
of being the first to produce a high-gain transistor at a cost permitting
its application to the high-volume commercial market.