Antique radios, Old Time Radios

OC74

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.
-

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: Braun T22 Günther Stabe † 19.8.20 More ...
OC74: TTT Steidle 1981 Günther Stabe † 19.8.20 More ...		OC74: Valvo_Dioden_Transistoren_1959 Thomas Günzel More ...

Usage in Models

1= 1957? ; 1= 1957 ; 3= 1958?? ; 1= 1958? ; 7= 1958 ; 4= 1959?? ; 6= 1959? ; 54= 1959 ; 38= 1960?? ; 25= 1960? ; 141= 1960 ; 8= 1961?? ; 23= 1961? ; 175= 1961 ; 25= 1962?? ; 49= 1962? ; 166= 1962 ; 12= 1963?? ; 26= 1963? ; 96= 1963 ; 13= 1964?? ; 7= 1964? ; 35= 1964 ; 29= 1965?? ; 3= 1965? ; 20= 1965 ; 4= 1966?? ; 2= 1966? ; 11= 1966 ; 3= 1967?? ; 2= 1967? ; 8= 1968?? ; 1= 1968 ; 2= 1969?? ; 1= 1969 ; 3= 1970?? ; 1= 1970? ; 1= 1972? ; 1= 1973?? ; 1= 1975?? ; 4= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1013

Collection of

Karlheinz Fischer (D)

Karl-Heinz Entrich † 7.21 (D)

Michael Gnaedig-Fischer (MEX)

Sándor Selyem-Tóth (H)

Peter Roggenhofer † 25.4.18 (A)

Glenn Moeller-Holst (DK)

OC74

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