Antique radios, Old Time Radios

OA72

ID = 34734

Country:

Germany

Brand:	Valvo GmbH, Radioröhrenfabrik; Hamburg
Developer:	Valvo GmbH, Radioröhrenfabrik; Hamburg
Tube type:	Solid-State-Diode Detector

Identical to

OA72 = OA79

Similar Tubes

Normally replaceable-slightly different:

2AP13 ; 2AP15 ; AA119 ; OA172 ; SFD107

Different maximum ratings:

AA113

First year

1955 Funkschau Heft 10, Seie 201; Hannover-Messe = vorgestellt!

First Source (s)

Mar.1957 : Valvo-Berichte

11.Jan.1955 : Valvo-Berichte Germanium-Dioden in Allglas-Technik OA70 - OA74

Base

Wires

Description

Germanium contact point high-frequency diode, 60 degrees C max operating temperature.
Also made by the other Philips related manufacturers.

Text in other languages (may differ)

Dimensions (WHD)
incl. pins / tip

5 x 12 x mm / 0.20 x 0.47 x inch

Weight

1 g / 0.04 oz

Information source

- - Manufacturers Literature Valvo-Handbuch 1968, KTT 1969/70

OA72: Taschen-Lehrbuch "Bastelpraxis" von W. Diefenbach, Franzis Verlag, 1960 Jürgen Küting
OA72: DVT 1971 ECA Günther Stabe † 19.8.20		OA72: Valvo_Dioden_Transistoren_1959 Thomas Günzel More ...

Usage in Models

2= 1955?? ; 2= 1955? ; 6= 1955 ; 2= 1956? ; 9= 1956 ; 3= 1957?? ; 2= 1957? ; 10= 1957 ; 6= 1958? ; 7= 1958 ; 2= 1959?? ; 10= 1959 ; 1= 1960?? ; 3= 1960? ; 12= 1960 ; 6= 1961? ; 1= 1961 ; 6= 1962?? ; 8= 1962? ; 1= 1962 ; 4= 1963?? ; 1= 1964?? ; 1= 1966?? ; 1= 1968

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):106

Collection of

Günter Kudicke (D)

Hermann Fleischanderl (A)

Jürgen Küting (D)

OA72

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