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TH4B

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ID = 8681
       
Country:
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Triode-Heptode   Frequency converter 
Identical to TH4B
Similar Tubes
Other base and other heater:
  ECH2
First Source (s)
1939 : History of the British Radio Valve to 1940
1938 : -- Original-techn. papers.

Base British-7-Pin, old (M7A) (Codex=Nao)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1.45 Ampere / Indirect / Parallel, (AC/DC)
Literature Taschenbuch zum Röhren-Codex 1948/49   
 
e_mullard_th4b.jpg
TH4B: PROPIA
Pedro Prieto-Castro

 
th4b_sock_1.png
TH4B: Tabu Röhren-Codex, 1948
Anonymous 15 Collector

 

Usage in Models 1= 1935?? ; 1= 1935? ; 1= 1938? ; 4= 1938 ; 9= 1939

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):16


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