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OC74

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ID = 33730
       
Country:
Germany
Brand: Valvo GmbH, Radioröhrenfabrik; 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
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.
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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
Information source -- Collector info (Sammler)   KTT 1969/70 (Towers IVT)
oc74_umgeb1.gif
OC74: Braun T22
Günther Stabe † 19.8.20     More ...
r9_4.gif OC74: TTT Steidle 1981
Günther Stabe † 19.8.20
More ...
 d_valvo_oc74_1.png
OC74: Valvo_Dioden_Transistoren_1959
Thomas Günzel † 1.8.22
More ...
Usage in Models 1= 1957? ; 1= 1957 ; 3= 1958?? ; 1= 1958? ; 7= 1958 ; 4= 1959?? ; 6= 1959? ; 55= 1959 ; 41= 1960?? ; 30= 1960? ; 140= 1960 ; 9= 1961?? ; 29= 1961? ; 175= 1961 ; 26= 1962?? ; 59= 1962? ; 169= 1962 ; 14= 1963?? ; 30= 1963? ; 97= 1963 ; 14= 1964?? ; 7= 1964? ; 36= 1964 ; 29= 1965?? ; 4= 1965? ; 20= 1965 ; 4= 1966?? ; 2= 1966? ; 11= 1966 ; 3= 1967?? ; 2= 1967? ; 8= 1968?? ; 1= 1968 ; 1= 1969?? ; 1= 1969 ; 6= 1970?? ; 1= 1970? ; 1= 1971?? ; 1= 1972? ; 1= 1973?? ; 1= 1975?? ; 3= 9999
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1054

Collection of

Karlheinz Fischer (D)
Jacky Parmentier (F)
Egon Strampe (D)
Marcello Astolfi (I)
Markus Müllner (A)
Hans Smit (NL)
Alessio Fantinato (I)
Daniel Consales (D)
Karl-Heinz Entrich † 7.21 (D)
Michael Gnaedig-Fischer (MEX)
Sándor Selyem-Tóth (H)
Museum Roggenhofer (A)
Glenn Moeller-Holst (DK)
 
oc74~~1.jpg

OC74
 
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