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Nokia RD-59
Analogue NMT-450 mobile telephone

RD-59 – also known as Mobira Talkman – was an analogue cellular mobile tele­phone set for the Nordic Mobile Telephone standard NMT-450, introduced in 1983 by Nokia Mobira in Finland. It was used in the Nordic countries: Norway, Sweden, Finland and Denmark, and in an adapted form also in other countries, including The Netherlands, Belgium, Luxemburg and the United Kingdom.

The image on the right shows an RD-59 that was used on the Dutch ATF-2 network from 1985 to 1999. It was marketed in the Netherlands by KPN (formerly: PTT) as the CARVOX 2453 car phone.

The difference with the native NMT-450 variant was that it had a 20 kHz channel spacing rather than the original 25. As a result, the Dutch were able to fit more channels in the available space and hence allow more users simultaneously.

The full-duplex radio transmitted in FM in the 451.310 to 455.730 MHz band with an output power of 6 to 18 Watts. Reception was 10 MHz higher, in the 461.310 to 465.730 MHz range.
  
Nokia Mobira RD-59

The radio consists of a universal compartmented die-cast aluminium enclosure that houses the electronic circuits. The same case was used for other versions of the radio, such as the simplex trunking variant. Attached at the right side is a large rechargeable NiCd battery pack and – at the front – a detachable handset with a coiled cable. At the top is a plastic grip with the ¼λ antenna.

Nokia Mobira RD-59 RD-59 RD-59 with handset off-hook Display and keypad Operating the keypad Switches at the right side Controls at the left side Warning message (Dutch) - You are talking via a radio connection which can be intercepted
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Nokia Mobira RD-59
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RD-59
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RD-59 with handset off-hook
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Display and keypad
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Operating the keypad
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Switches at the right side
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Controls at the left side
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Warning message (Dutch) - You are talking via a radio connection which can be intercepted

RD-58
The same enclosure was used for the Nokia RD-58, which is actually a two-way radio of which the internal design is completely different from the RD-59. The RD-58 was available as a standard two-way radio, as a trunking radio, and as a secure (trunking) radio — the SE-580 CRYPTOVOX — which had a built-in Crypto AG/Hagelin HC-3400 voice encryption module.

 More about the SE-580


Amateur use
When NMT-450 — in the Netherlands known as ATF-2 — was dismantled in 1989 and 1999, the radio ended on the HAM surplus market and was successfully converted to a fully-featured 70 cm rugged amateur rig, that covered the entire 70 cm amateur band from 430 to 440 MHz in FM [1].

 Conversion to amateur rig (off-site)


Glossary
ATF   Autotelefoon
Name for the Dutch automatically-switched analogue carphone networks, of which three generations have existed (nown as ATF-1, ATF-2 and ATF-3. Succeeded in 1994 by GSM.  More
GSM   Global System for Mobile Communication
KPN   Koninklijke PTT Nederland
Royal PTT of The Netherlands. This was the name of the former Dutch state-owned telecom monopolist PTT after its privatisation in 1989.
PTT   Staatsbedrijf der Posterijen, Telegrafie en Telefonie
Dutch state-owned telecommunications monopolist from 1881 until its privatisation in 1989. Responsible for the development and operation of the post, telegraph and telephone networks in the Netherlands. Also responsible for monitoring the radio spectrum and for enforcing the telecom laws.
References
  1. Museum Jan Corver, Conversion of the Nokia RD-59 for amateur use
    PE1DTN, PE1RRT, PE1MIX and PE1OLQ. 26 March 1999.
Further information
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Crypto Museum. Created: Saturday 25 May 2019. Last changed: Tuesday, 11 June 2019 - 15:52 CET.
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