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KE-30
Digital spy radio receiver - wanted item

KE-30 was a small receiver, built around a digital frequency synthesizer, developed in the early 1980s by Heinrich Pfitzner GmbH in Bergen-Enkheim (Germany) as part of a revised version of the SP-20 spy radio set, known as Projekt 928. Some prototypes were built but the receiver was never taken into large-scale production. Instead the existing FE-8 (BN-58) remained in use.
 
The enclosure of the KE-30 receiver is identical to that of the KS-30 frequency synthesizer. It has the same controls and the same 5-digit LED display. The only difference is that the space at the right hand side of the front panel, is taken by a LED-bar signal strength indicator, whereas the KS-30 has a 20-pin socket in this position.

The image on the right shows one of the very few KE-30 prototypes that have survived. 1
  
KE-30 receiver is grey enclosure with dark front panel [x] WANTED ITEM

Development of a revised version of the SP-20 spy radio set, known as Projekt 928, was started in the late 1970, and the new system was planned for release in or around 1983. It consisted of the existing S-6800 transmitter, the ASG-6800 antenna tuner (both made by AEG Telefunken) and KS-30 frequency synthesizer (to replace the crystals) made by Heinrich Pfitzner GmbH.

New in Project 928 was the digital KE-30 receiver, that was aimed to replace the existing FE-8 receiver. The FE-8 was developed by Wandel & Goltermann in the late 1950s, and had already been used with the SP-15 spy radio sets. When the SP-20 replaced the SP-15 in the mid-1970s, no good alternative for the FE-8 was found and so it was issued again with the SP-20.

Pfitzner was comissioned to develop the new KE-30 receiver, which was ready in 1983. Despite the fact that several prototypes had been built, the receiver was never taken into large-scale production, as orders for development of the pan-European FS-5000 had already been given.
 
  1. Please note that this receive is not part of our collection. We have no information about the current whereabouts of it. Crypto Museum are currently looking for a KE-30 receiver for its collection.

Block diagram
The simplified block diagram below roughly shows how the KE-30 works [1]. The device is built around a TCA440 integrated AM receiver IC, that is driven by a frequency synthesizer that shows great resemblance to the KS-30.



 
References
  1. Helmut 'Jim' Meyer, HS0ZHK, My way to Ham - Radio and beyond
    Website QRZ.COM. Personal correspondence.

  2. Silicium Microelectronics Integration GmbH, TCA440 datasheet
    December 1995.

Further information

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Crypto Museum. Created: Sunday 04 September 2016. Last changed: Monday, 05 September 2016 - 10:14 CET.
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