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97

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ID = 30774
       
Country:
Germany
Brand: Siemens (& Halske, -Schuckert Werke SSW, Electrogeräte); Berlin, München
Tube type:  Screen-grid Tetrode   Audio Frequency 
  <1925 very rare. ***
Identical to 97 = SSII
First Source (s)
1917 : Saga of the Vacuum Tube, Tyne p.254

Filament Vf 2.2 Volts / If 0.25 Ampere / Direct / Battery =
Description Bei nur 10,5 V an Schirmgitter und Anode 30fache Verstärkung.
Das Schirmgitter -zwischen Steuergitter und Anode- soll die unerwünschte Anodenrückwirkung reduzieren. Es wurde damals Schutznetz genannt. 
Information source Saga of the Vacuum Tube, Tyne   

97_spec.png
97: Riepka, Die Röhre, 1926
Anonymous 15 Collector

 

You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]
  

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