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OC74

Information - Help 
ID = 33730
       
Country:
Germany
Brand: Valvo Radioröhrenfabrik GmbH; Hamburg
Tube type:  Transistor   Power/Output 
Identical to OC74
Similar Tubes
Other shape (e.g. bulb type):
  GFT32
Normally replaceable-slightly different:
  2SB174 ; 3AX81 ; 3AX81A ; 3AX81B ; 3AX81C ; 942T1 ; AC105 ; AC106 ; AC128 ; AC153 ; OC1074 ; OC307 ; OC308 ; OC604spez ; OC72 ; OC74N ; OC76 ; SFT125 ; SFT131 ; SGS270
Different maximum ratings:
  AC117 ; AC124 ; AC188 ; AC193 ; GET102 ; GET103 ; GET104 ; WN5442
Other base and data slightly different:
  SFT124 ; TF66
First Source (s)
Mar.1958 : Valvo-Berichte
Predecessor Tubes OC72   OC14  
Successor Tubes AC128   AC188   AC132   OC79  

Base Wires
Filament Solid State
Description

PNP germanium junction transistor intended as low power amplifier / switch in AF applications. All-glass body with heat sink. Red dot indicates collector.
Also made by Philips and related manufacturing plants.
-

 
Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
5 x 15 x mm / 0.20 x 0.59 x inch
Weight 4 g / 0.14 oz
Literature -- Collector info (Sammler)   KTT 1969/70 (Towers IVT)
  oc74_umgeb1.gif
  OC74: Braun T22
Günther Stabe
 
oc74~~1.jpg
OC74: Sammlung PR
Peter Roggenhofer † 25.4.18

 
r9_4.gif
OC74: TTT Steidle 1981
Günther Stabe

 
d_valvo_oc74_1.png
OC74: Valvo_Dioden_Transistoren_1959
Thomas Günzel


Usage in Models 1= 1957 ; 3= 1958?? ; 1= 1958? ; 7= 1958 ; 4= 1959?? ; 6= 1959? ; 53= 1959 ; 33= 1960?? ; 17= 1960? ; 131= 1960 ; 8= 1961?? ; 19= 1961? ; 171= 1961 ; 22= 1962?? ; 41= 1962? ; 155= 1962 ; 12= 1963?? ; 17= 1963? ; 92= 1963 ; 11= 1964?? ; 7= 1964? ; 34= 1964 ; 25= 1965?? ; 2= 1965? ; 20= 1965 ; 3= 1966?? ; 2= 1966? ; 11= 1966 ; 2= 1967?? ; 1= 1967? ; 7= 1968?? ; 1= 1968 ; 1= 1969?? ; 1= 1969 ; 3= 1970?? ; 1= 1972? ; 5= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):930


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