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81M

Information - Help 
ID = 7409
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  High-vacuum Rectifier 
Identical to 81M

Base UX-Base (4 Pins (2 thick, USA 1924, UX) (Codex=Bo)
Filament Vf 7.5 Volts / If 1.2 Ampere / Direct
Information source Taschenbuch zum Röhren-Codex 1948/49   
 
4b_2.png
81M
Emilio Ciardiello

 

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