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MPR-1
Mason
TSCM
  
PACMR-1 →
  
Mason MPR-5
Mini Probe Receiver

The MPR-5 was a portable modular intercept receiver, developed and produced by Mason Engineering Inc. (USA) in 1990, as the successor to the MPR-1 receiver. It was the last member of the Mason family of bug finders to be released before the company had to close its doors. The receiver is similar in appearance to the earlier MPR-1 and has the same size.

There are however some important differences. First of all, the controls of both the receiver and the display unit are slightly different. New on this model is the addition of a narrow frequency counter with LCD readout, mounted in between receiver and display unit.

The most striking difference however, is that the adjustment controls have been moved to the receiver unit, whereas on earlier units (MPR-1) each plug-in unit had its own controls. The new design is more cost-effective and has a far more accurate tuning adjustment.
  

Despite the fact that Mason went into liquidation in the late 1990s, the MPR-5 still is considered one of the most modern and useful mini probe receivers of the analog era. It is still widely used today by TSCM companies all over the world. It was the last model produced by Mason.

The closed aluminium suitcase The opened aluminium suitcase revealing its contents Close-up of the contents of the case The operational unit Close-up of the three units: receiver, counter and display Close-up of the panorama viewer (display unit) Close-up of the frequency counter The accurate adjustment control on the receiver and one plug-in unit
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The closed aluminium suitcase
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The opened aluminium suitcase revealing its contents
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Close-up of the contents of the case
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The operational unit
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Close-up of the three units: receiver, counter and display
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Close-up of the panorama viewer (display unit)
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Close-up of the frequency counter
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The accurate adjustment control on the receiver and one plug-in unit

This page is a stub. More information will be presented here as and when it becomes available.


Documentation
  1. Mason Engineering Inc., MPR-5 User Manual
    MPR-5 - MM - 2/86. 1985. 37 pages.

  2. Mason Engineering Inc., MPR-5 Maintenance Manual and Technical Description
    MPR-5 - MI - 2/24/86. 1986. 65 pages at A4 size.
     Figures 39, 40, 41, 42 and 48 at A3 size
Further information
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Crypto Museum. Created: Wednesday 09 December 2009. Last changed: Friday, 08 September 2017 - 21:08 CET.
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