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Radio

Tekniikka, Kauppa, Huolto, Harrastelijat, Kuuntelijat, Amatöörit

Periodical   Volume 5Number 1February - April 1952

fi_radio_1952_1_cov.jpg fi_radio_1952_1_bk_cov.png fi_radio_1952_1_p15.png fi_radio_1952_1_p16.png fi_radio_1952_1_p17.png
created by: Franz Harder (08.Apr.16) available by: Ake Nyholm
Page Content
15 
created by
Franz Harder
  • 50 years old radio historical memory - first transatlantic radio wave connection
  
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created by
Franz Harder
  • Helvar Oy 30-years anniversary - A brief history of the company on the time frame 1921-1951 (pp. 16-17)
  
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Some example tube pages for sets you can see there:

Solid-State-Diode OA50 (1951)
Solid-State-Diode OA51 (1952)
Solid-State-Diode OA52 (1952)
Solid-State-Diode OA53 (1952)
Solid-State-Diode OA55 (1952)
Solid-State-Diode OA56 (1952)
   
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