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History of the manufacturer  

Proton A/S; (where?)

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Name: Proton A/S; (where?)    (N)  
Abbreviation: proton
Products: Model types

Proton A/S - where?
Proton was manufacturing tape recorders for home and professional use, and sold drives e.g. to 'Radionette' (Petter Wessels Radiofabrikk).
See also 'Siemens & Halske Norsk Aktieselskab, Oslo'

Proton A/S was mentioned in 1947 with Siemens Norge and 'Bergen Industri-Investering A/S', possibly as the "successor" of Siemens Norge after WW2.
1962: Proton A/S becomes 'Siemens Norge AS' (1970: Siemens A/S).

This manufacturer was suggested by Georg Richter.

Some models:
Country Year Name 1st Tube Notes
57 Magnetofon Hi-Fi 9, Standard 9 EF804  2 track, reel-to-reel, 1 7/8 - 3 3/4 - 7 1/2 ips. reel diameter / diamètre des b... 
54 Magnetofon 6 EF40  Two track, tape speed 9,5 and 19 cm/s. Volume indicator (neon bulb). 
84 Stereo Tuner 440   Proton 440 AM/FM Stereo HiFi Tuner.  Has dynamic noise reduction circuitry for F...