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RT-2000
4-channel telephone intercept recorder

RT-2000 was an automatic 4-channel law enforcement telephone intercept recorder, developed in 1982 by Radio Trevisan in Trieste (Italy). The recorder was intended for lawful wiretapping, and was built on the chassis of a portable UHER 4400 Report Monitor open-reel recorder [3], that was completely rebuilt with new circuits, and was extended with a thermal printer and a display.

The image on the right shows an example of a typical RT-2000 [1]. The original UHER open reel recorder on which the device is based can still be recognised. The recorder's original front panel has been removed by Trevisan and is replaced by different controls and a series of indicators.

More importantly, a small printer was added at the front left, with a 14-digit LED display at the top surface. The device can record up to 4 audio channels simultaneously and prints the relevant information, such as time and date, and the dialled telephone number, on the ticket printer.
  
RT-2000 wire tapping recorder

As the recorder was used by law enforcement agencies during criminal investigations, the printer provided the necessary legal evidence by logging the data. The RT-2000 was developed in 1982 and was in production until 1988. The device shown here was produced in 1986. The RT-2000 was succeeded in 1985 by the RT-5000 and eventually in 1995 by the fully digital RT-6000 [2].

Seen from the front RT-2000 wire tapping recorder Front panel Front view Right side view Display and thermal printer Printer with removed lid Power cable
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×
A
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Seen from the front
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RT-2000 wire tapping recorder
A
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Front panel
A
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Front view
A
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Right side view
A
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Display and thermal printer
A
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Printer with removed lid
A
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Power cable

Controls
The diagram below shows the position and function of the various controls and connections of the RT-2000. The standard features of the UHER 4400 on which the record is based, are still available at the usual position. The six standard control buttons are the top front right. The front panel has been replaced completely and now features a printer and a display inside a bulge at the left. The speed selector is at the top right, but all other controls are different from the 4400.

Controls and connections on the RT-2000

All connections are at the right. There are three DIN sockets for line input, line output and 12V DC power input. Please note that the pinout of these sockets is different from the ones on the original UHER 4400. To the right of the three DIN sockets is the line level adjustment knob.

Interior
The interior of the RT-2000 can be accessed by rotating two bolts at the bottom panel, after which the panel can be removed. This reveals two printed circuit board (PCBs) that are inter­connected by means of a 40-wire blue flatcable. The top PCB is held in place by a single screw.

After removing this screw, the upper PCB can be hinged towards the left, as shown in the image on the right. This reveals the unaltered UHER 4400 mechanism, which is the only part that has been left intact from the original UHER design.

All other parts, including the power section, the motor driver, the audio board and the digital control board, have been completely redesigned by Trevisan. The hinged audio board contains four purpose-built circuit blocks, of which the function is currently unknown. They most likely contain a potted PCB with several components.
  
Interior

The lower PCB (i.e. the PCB that is mounted to the right of the mechanism), is the control board, which is built around an RCA CDP1802 8-bit microprocessor [4], with external RAM and EPROM. A small vertically mounted PCB at the rear centre, hold the motor driving circuit. All circuits are powered by 12V DC, which should be supplied via the rearmost DIN socket at the right side.

Bottom panel removed Interior Interior Audio board Wiring of the DIN sockets Interior - flywheel Interior Controller
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B
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Bottom panel removed
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Interior
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Interior
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Audio board
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Wiring of the DIN sockets
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Interior - flywheel
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Interior
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Controller

Connections
The RT-2000 has a series of DIN connectors at the right side, of which the rightmost one (i.e. the one closed to the rear of the device) is the power socket. Note that the pinout of these sockets is different from the ones on the original UHER 4400 recorder.

Power socket
The rightmost socket is for the connection of a PSU. On the Italian version of the RT-2000 it is marked as ALIMENTATORE. On the original UHER recorder it was marked with a triangle.

  1. ?
  2. 12V
  3. GND
  4. ?
  5. ?
  6. ?
Note that this connection is different from the original accessory socket of the UHER 4400 Report recorder. The RT-2000 is powered by a +12V DC source, whilst the UHER recorders needed -7.5V (the UHER had + connected to ground). On the RT-2000, the (-) terminal is connected to ground.

Documentation
  1. UHER, UHER 4000/4200/4400 Report Monitor, Service Handbook
    Without circuit diagrams. Date unknown. 1

  2. UHER, UHER 4000 Report-L, Model 4200 and 4400 Supplement
    With full circuit diagram. Date unknown. 1

  3. UHER, UHER 4000 Report-L and Report-S, Parts List
    Date unknown. 1

  4. UHER, UHER 4000 Report-L, Circuit Diagram
    Date unknown. 1

  5. UHER, UHER 4000/4200/4400 Report-IC and Stereo IC, Service Manual
    Complete with circuit diagrams. Date unknown. 1

  6. UHER, UHER 4000 Report IC, Circuit Diagram
    Date unknown. 1
  1. Via website HiFi Engine www.hifiengine.com

References
  1. Günter Hütter, Photographs of Radio Trevisan RT-2000 recorder
    Retrieved June 2015.

  2. Radio Trevisan SpA, La storia
    Former company website. 30 July 2009, Retrieved June 2015 via Wayback machine.

  3. UHER, UHER 4000/4200/4400 Report Monitor, Service Handbook
    Without circuit diagrams. Date unknown. 1

  4. Wikipedia, RCA 1802
    Retreived December 2016.
  1. Via website HiFi Engine www.hifiengine.com

Futher information
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Crypto Museum. Created: Saturday 24 December 2016. Last changed: Tuesday, 13 June 2017 - 18:05 CET.
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