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HL23DD

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ID = 14314
       
Country:
Great Britain (UK)
Brand: Mazda = Valve (Tube) brand GB (see also France)
Tube type:  Double Diode-Triode   Audio Frequency 
Identical to HL23DD
Similar Tubes
Normally replaceable-slightly different:
  CV1306
Base Octal-8 GB, (Mazda), K8B, MO (Codex=Vu)
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.05 Ampere / Direct / Battery =
Information source Taschenbuch zum Röhren-Codex 1948/49   
History of the British Radio Valve to 1940   p. 181
623.png HL23DD: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad 		hl23dd_mazda_data_01.png
HL23DD: Original data sheet
Otto Galli
More ...
Usage in Models 1= 1932 ; 1= 1937 ; 1= 1938?? ; 9= 1939 ; 5= 1940 ; 1= 1941? ; 1= 1942? ; 2= 1945 ; 5= 1947 ; 1= 1948?? ; 1= 1948? ; 3= 1948 ; 3= 1949 ; 1= 1950?? ; 3= 1950 ; 1= 1951 ; 1= 1952?? ; 1= 1952 ; 1= 1967
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):42
Museum "Wireless In Wales Museum"

Collection of

Patrice Zeissloff (F)
Georges Werts (B)
 
hl23dd_mazda_ph1r.jpg

HL23DD
 
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