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R122N

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ID = 36319
       
Country:
France
Brand:
Tube type:  Vacuum Pentode   Universal 
Identical to R122N = PTT202C
First Source (s)
Dec.1948 : -- Collector info (Sammler) Date 55.48 code on tube
Predecessor Tubes R122  

Base Octal (Int.Octal, IO) K8A, USA 1935 Top contact with a cap.
Was used by Military and/or Government
Filament Vf 18 Volts / If 0.225 Ampere / Indirect / Specified voltage AC/DC
Description

Langlebensdauer Weitverkehrsröhre (Poströhre)

 
Text in other languages (may differ)

ptt202c_r122n_culotr.png R122N: Technique de l'ingénieur
Patrice Zeissloff


Just Qvigstad
r122n_ptt202c_doc_1.png
R122N: Technique de l'ingénieur
Patrice Zeissloff

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Collection of

 
r122nptt202crtph1r.jpg

 

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