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Paper tape transmitter
- under construction
T.send.61, often abbreviated to T-61, was a punched paper tape transmitter,
or retransmitter, developed in the early 1950s by Siemens
in Germany.
The device was intended as an add-on for
teleprinters (telex machines),
such as the Siemens T-37.
It allows pre-perforated 5-level (baudot)
paper tapes, created on a regular telex,
to be transmitted via a telex line or radio channel.
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The unit measures 37 x 20.5 x 16 cm and was available in black and beige,
to match the telex equipment with which it was used.
It is suitable for a 50 baud 1 data rate,
and was often used in combination with
the Siemens T-37 teleprinter,
which did not have a built-in tape transmitter.
The device is powered directly from the 220V AC mains and can be connected
to a dedicated telex line or — with a suitable interface — to a radio.
The T.send.61 was introduced in the early 1950s and was
in production until approximately 1965.
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The interior of the T.send.61 can be accessed by loosening a single screw
at the centre of the top surface. This allows the case shell to be slid somewhat towards
the rear and then lifted off. Inside the case is a motor and some power
circuitry, plus a standard Siemens 5-level tape reader.
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The device is also suitable for a 45 baud data rate.
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© Crypto Museum. Created: Wednesday 18 May 2016. Last changed: Tuesday, 10 January 2023 - 08:16 CET.
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