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L21/DD

Information - Help 
ID = 14408
       
Country:
Great Britain (UK)
Brand: Mazda = Valve (Tube) brand GB (see also France)
Tube type:  Double Diode-Triode   Audio Frequency 
Identical to L21/DD
Similar Tubes
Normally replaceable-slightly different:
  CV1308

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=Fp)
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.1 Ampere / Direct / Battery =
Information source Taschenbuch zum Röhren-Codex 1948/49   
 
e_ediswan_l21_dd.jpg
L21/DD: PROPIA
Pedro Prieto-Castro

 
128_4.png
L21/DD: Telefunken Werkstattbuch
Wolfgang Bauer

 
hl21dd_l2dd_l21dd~~1.png
L21/DD: own collection
Peter den Boer


from Just Qvigstad

Usage in Models 3= 1934 ; 4= 1935 ; 3= 1936 ; 2= 1937

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):12


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