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← Gretag Crypto Data Telex
The TC-534 was housed in two same-size watertight military containers,
which allowed easy transportation and operation in a mobile environment.
The image on the right shows an operational TC-534 (left) connected to
a typical Siemens T-100 teletypewriter
(centre) of the era.
The TC-534 is one of the first fully electronic cipher machines made by
Gretag,
and marks the transition from (electro)mechanical devices
to electronic ones, built – in line with the industry –
with the latest transistor technology of the era.
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As much of an electronic cipher machine evolves around digital circuits,
it was decided to develop complete pre-assembled
digital building blocks
— the co-called Gretag Bausteinsystem —
that would shorten the precious development time and improve the
serviceablilty of the machine.
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The image on the right shows one of the circuit boards of the TC-534,
which holds no less than 18 of such circuit blocks. In 1964, a
patent
for their construction and manufacturing
was filed in Canada, with a priority date of 5 December
1963. Kurt Ehrat and Dieter Eckstein were listed as the inventors, acting
on behalf of Gretag [2].
In order to generate some
return on investment,
Gretag decided to make this technology available to other manufacturers
— as OEM parts — but it remains to be seen whether this was successful.
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By the time the technology became available, the well-known 7400-series
TTL Integrated Circuits (ICs) had been introduced, and it became clear that
that was the way forward. Furthermore, other manufacturers – like Philips –
already had similar building blocks on the market for several years and
was better equipped for their distribution.
The TC-534 was later redesigned with TTL ICs.
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TC-534. If you have additional information, please let us know.
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© Crypto Museum. Last changed: Monday, 08 April 2019 - 05:18 CET.
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