Antique radios, Old Time Radios

OC28

ID = 33990

Country:

Germany

Brand:	Valvo GmbH, Radioröhrenfabrik; Hamburg
Tube type:	Transistor Power/Output

Identical to

OC28

Similar Tubes

Normally replaceable-slightly different:

GET9

Different maximum ratings:

ASZ15 ; GET571 ; GET7 ; GET8

First Source (s)

Mar.1960 : Valvo-Berichte

Predecessor Tubes

OC16

Successor Tubes

ASZ15

Base	SPECIAL TUBEBASE in general
Filament	Solid State
Description	PNP germanium alloy transistor intended as power amplifier / switch in AF applications. Also made by Mullard and Philips related manufacturing plants. Text in other languages (may differ)
Dimensions (WHD) incl. pins / tip	26 x 40 x 10 mm / 1.02 x 1.57 x 0.39 inch
Weight	10 g / 0.35 oz
Information source	-- Collector info (Sammler) KTT 1969/70


	OC28: Empfänger ED80 (Rohde&Schwarz) Heinz Höger

OC28: Eigene Sammlung
Siegfried Neumann

OC28: TTT Steidle 1981
Günther Stabe † 19.8.20

OC28: Valvo Taschenbuch 67
Heinz Höger

Usage in Models

1= 1961? ; 1= 1961 ; 2= 1962 ; 1= 1963? ; 2= 1963 ; 2= 1964?? ; 1= 1964? ; 1= 1964 ; 1= 1965?? ; 2= 1965 ; 1= 1966 ; 1= 1969

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):16

Collection of Horst Willers (D)

Collection of Siegfried Neumann (D)

Collection of Christian ADAM (F)

Collection of Karl-Heinz Entrich (D)

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