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MHSD4

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ID = 18412
       
Country:
Great Britain (UK)
Brand: Gecovalve (Geco) = Brand of General Electric (GB)
Tube type:  Diode-Triode   Audio Frequency 
Identical to MHSD4
Similar Tubes
Other base and data slightly different:
  E444S ; REN924

Base Europe 6-Pin B6 (1933) (Codex=F) Top contact with a cap
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1 Ampere / Indirect / Parallel, (AC/DC)
Literature Taschenbuch zum Röhren-Codex 1948/49   
 
mhsd4_1.jpg
MHSD4: F. Donkers
Wolfgang Holtmann

 
mhsd4.png
MHSD4: F. Donkers
Wolfgang Holtmann

 

Usage in Models 7= 1933 ; 6= 1934

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):13


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