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HYX-57
Wireline Adapter for KY-57

The HYX-57/TSEC is a wireline adapter (WLA), or Net Radio Interface (NRI) 1 , for the VINSON wideband voice/data encryption device TSEC/KY-57, made by Raytheon Corporation (US) around 1974. It has the same form factor as the KY-57 and provides the interface between the KY-57 and a standard 2- or 4-wire telephone line, up to a distance of 16 kilometres (10 miles) [1].
 
For longer distances, multiple HYX-57 units can be cascaded — i.e. mounted back-to-back — to form a repeater. The device is also known by its national stock number NSN 5810-01-026-9622.

The image on the right shows a typical HYX-57 with the protective rubber caps fitted over the sockets in order to protect them against dirt and dust. The device uses the same accessories as the KY-57, such as the mounting bracket, the battery and the optional power supply unit (PSU). Apart from the KY-57, it was also used with its backwards compatible successor, the KY-99.
  
HYX-57 Wireline adapter

At present, no further information about the HYX-57 is available. If you have any further information or documentation that you would like to share with us, please contact us.
 
  1. Net Radio Interface (NRI) was known in the past as Radio-Wire Integration (RWI). The new name is considered to describe its function more accurately.

HYX-57 Wireline adapter HYX-57 Wireline adapter - rear view Front view Front panel Wire terminals Socket for connection of Radio/KY device Sockets Power socket

 
Controls
All controls and connections are located at the device's front panel, with the exception of the power socket, which is located at the rear. The diagram below gives an overview of the controls. The terminals for connection of the 2- or 4-wire field lines, are located at the bottom right. The MODE-selector at the top left is used to select the required mode of operation (i.e. 2- or 4-wire).


The large connector at the bottom centre, is used for connection to the KY-57 by means of a CX-13072 cable. Alternatively, it can be used for connection to a KY-57 compatible COMSEC radio, using the CX-13310/VRC cable [E].
 
Setup
The diagram below shows how the HYX-57 is used to connect two KY-57 devices via standard WD-1 (2-wire) field telephone cable. The KY-57 is connected to the HYX-57 instead of the radio, using a CX-13072 cable between the HYX-57 RADIO/KY socket and the RAD socket of the KY-57.


Alternatively, if a COMSEC enabled SINCGARS radio is used, the transceiver (RT) can be connected directly to the HYX-57 by means of a CX-13310/VRC cable, as illustrated in the diagram below.


 
Interior
The HYX-57 is housed in a die-cast aluminium enclosure, which is nearly identical to that of the KY-57. Access to the interior can be gained via the top panel, that is held in place by 8 recessed screws. After removing these screws, the top panel can be removed, and the interior is exposed.
 
Inside the case are eight Printed Circuit Boards (PCBs) that are slotted into a backplane at the bottom. The boards are marked E-DTx in which 'x' represents a capital letter of the alphabet. The rearmost board (E-DTS) contains the power circuitry and is not slotted as it is fixed in place.

The image on the right shows the HYX-57 after the top panel is taken off and the frontmost PCB (E-DTL) has been removed. The boards contain a variety of custom-made (OEM) chips and other parts, of which the majority is made by Raytheon Corporation, who also manufactured the device.
  
HYX-57 interior

 
HYX-57 interior HYX-57 interior HYX-57 interior HYX-57 interior One of the PCBs Close-up of the E-DTL board PCB's slotted into a backplane Top view

 
Cables
  • CX-13060
  • CX-13061
  • CX-13071
    HYX-57 to PRC-77
  • CX-13072
    HYX-57 to KY-57
  • CX-13310/VRC
    HYX-57 to RT
  • 6150-01-444-8013
    HYX-57 to KY-99
Documentation
  1. TM 11-5810-256-OP-2, Technical Manual TSEC/KY-57
    Headqarters, Department of the Army, Washington, 1 December 1981. 1

  2. TM 11-5810-256-OP-6, Operating Procedures KY-57   WANTED
    Operating Procedures for Communications Security Equipment TSEC/KY-57
    (with HYX-57/TSEC) FM Secure Remote Communications.
    Headqarters, Department of the Army, Washington, 12 May 1983.

  3. TM 11-5820-890-10-1, SINCGARS ICOM Ground Combat Net Radio
    Headqarters, Department of the Army, Washington, 1 September 1992. 2

  4. TM 11-5820-890-10-3, SINCGARS NON-ICOM Ground Combat Net Radio
    Headqarters, Department of the Army, Washington, 1 September 1991. 2

  5. TB 11-5820-890-10-3, Operation of Wireline Adapter Cable CX-13310/VRC
    Headqarters, Department of the Army, Washington, 1 April 1993. 2

  1. Scanned by Google.
  2. Provided by Liberated Manuals.

References
  1. Jerry Proc and contributors, HYX57 Wireline Adapter
    Retrieved March 2017.

  2. Brooke Clarke, KY-57 and HYX-57
    Retrieved March 2017.

Further information

HYX-57 (left) and KY-57 (right)

 
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Crypto Museum. Created: Tuesday 07 March 2017. Last changed: Wednesday, 08 March 2017 - 08:32 CET.
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