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EARLY
TRANSISTOR HISTORY AT GE Jerry Suran – The Story of the Unijunction Transistor |
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Oral History – Jerry Suran (Continued) |
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Shown on this page are
photos of various early unijunction transistor devices. The two units shown
together at the upper right are actual lab prototypes that were developed in
Arnie Lesk’s lab and then used as the basis for the first unijunction
applications by Jerry Suran. Note the
fragile germanium bar with attached emitter lead internal to each
device. Shown above is a sample of a
more mature prototype, with a solid epoxy case and a more rugged lead
attachment process. You can view the
germanium die through the epoxy case. This 1953 prototype is still
functional. Finally, shown to the
right, are examples of early pre-production E-Lab devices, which were
fabricated in the 1954 timeframe.
Note use of the metal cases, which would have been a requirement for
actual commercial use. The triode
(labeled “38-2”) is a germanium unijunction, while the remaining unit is a
germanium tetrode prototype. Both of
these units are still functional.
Go
To Suran Oral History, Page 5 |
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COPYRIGHT
© 2005 by Jack Ward. All Rights
Reserved. http://www.transistormuseum.com/ PAGE
4 |
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