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20J8M

Information - Help 
ID = 39379
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Triode-Heptode   Frequency converter 
Identical to 20J8M
Similar Tubes
Other shape (e.g. bulb type):
  20J8 ; 20J8GM

Base Octal (Int.Octal, IO) K8A, USA 1935
Filament Vf 20 Volts / If 0.15 Ampere / Indirect / Series, AC/DC
Description Canadian (Rogers) type. 
Literature Babani, International Radio Tube Encyclopaedia   
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20j8gm_1_2.png
20J8M: Manufacturer's Literature
Emilio Ciardiello


Usage in Models 5= 1939 ; 6= 1940? ; 24= 1940

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):35

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