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ID = 33919
Brand: Valvo GmbH, Radioröhrenfabrik; Hamburg
Tube type:  Transistor   Universal 
Identical to OC77 = 2N284A
Similar Tubes
Normally replaceable-slightly different:
  2SB177 ; NKT217 ; OC1077 ; OC77P ; WN5442
Different maximum ratings:
First Source (s)
Mar.1958 : Valvo-Berichte

Base Wires
Filament Solid State
Description PNP germanium junction transistor intended as pre-amplifier / switch in AF applications. 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 2 g / 0.07 oz
Information source -- Collector info (Sammler)   KTT 1969/70
  OC77: H. Schreiber Radio-TV Transitors
Hugo Sneyers
OC77: NL
Nikolaus Löwe

OC77: TTT Steidle 1981
Günther Stabe

OC77: Valvo_Dioden_Transistoren_1959
Thomas Günzel

Usage in Models 1= 1958?? ; 2= 1960? ; 1= 1960 ; 1= 1961?

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):5

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