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USSR
Rotor
Fialka
  
P-590A
Parallel to serial converter - this page is a stub - wanted item

The P-590A (Russian: П-590А), is a morse transmitter that is driven by a 5-level punched paper tape. It was used by the air force of the countries of the former Warsaw Pact for transmitting pre-recorded telegraphic messages over radio. As part of the R-142 radio station, the device was also used as a parallel-to-serial convertor for the Russian Fialka M-125 and M-125-3 cipher machine.

The P-590A can read the 5-level punched paper tape created by the Fialka cipher machine and convert it into morse code, so that it can be sent directly with a (short wave) radio transmitter. This off-line method was used when the Fialka machine was located outside the radio station.

The device can also be connected directly to the parallel output of the Fialka, in which case no punched paper tape is involved and the 5-bit digital output produced by the Fialka is directly translated into a single-bit morse code signal. In the case, the device acts as an in-line serialiser.
  
P-590A unit. Images obtained from [1].

In the latter case, the 10-pin data output at the right side of the Fialka, is connected directly to the 10-pin data input port of the P-590A.

P-590A unit. Images obtained from [1].
P-590A unit. Images obtained from [1].
P-590A unit. Images obtained from [1].
P-590A unit. Images obtained from [1].
P-590A unit. Images obtained from [1].
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P-590A unit. Images obtained from [1].
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P-590A unit. Images obtained from [1].
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P-590A unit. Images obtained from [1].
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P-590A unit. Images obtained from [1].
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P-590A unit. Images obtained from [1].

Names
  • Lochstreifensender
  • Morsezeichengeber
  • Punched paper tape transmitter
  • Morse code generator
References
  1. Jörg Drobick, Mi 9 U / P-590A
    SAS und Chiffrierdienst. Retrieved April 2016.
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Crypto Museum. Created: Friday 01 April 2016. Last changed: Friday, 08 January 2021 - 10:36 CET.
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