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ID = 42288
United States of America (USA)
Brand: Raytheon Mfg. Co.; Cambridge, MA
Tube type:  Transistor   Audio Frequency 
Identical to 2N138
Similar Tubes
Normally replaceable-slightly different:

Base Wires
Filament Solid State
Description Material/Aufbau/Pol.: Germanium Flächen PNP;
Form/Case: ~ TO-22;
Daten/ I F: 1 mA; U F: 6 V; Isp: 6 µA; ß (beta): 140; N: 50 mW; Imax(Ic): 50 mA; Umax(Uce): -12 V; f g(FT): 1.2 MHz; tmax: __ °C.
Varianten: 2N138A, 2N138B = Umax: -30 V. - 
Dimensions (WHD)
incl. pins / tip
5 x 8 x 3 mm / 0.20 x 0.31 x 0.12 inch
Weight 1 g / 0.04 oz
Information source
2N138: TTT Steidle 1981
Günther Stabe


Usage in Models 12= 1956 ; 6= 1957? ; 1= 1959? ; 1= 1960??

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):20

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