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OA72

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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
diode_oa72_schaltbild_1960.png
OA72: Taschen-Lehrbuch "Bastelpraxis" von W. Diefenbach, Franzis Verlag, 1960
Jürgen Küting
do29_27.gif OA72: DVT 1971 ECA
Günther Stabe † 19.8.20
d_valvo_oa72_1.png
OA72: Valvo_Dioden_Transistoren_1959
Thomas Günzel † 1.8.22
More ...
Usage in Models 2= 1955?? ; 2= 1955? ; 6= 1955 ; 2= 1956? ; 9= 1956 ; 3= 1957?? ; 2= 1957? ; 10= 1957 ; 6= 1958? ; 8= 1958 ; 2= 1959?? ; 10= 1959 ; 1= 1960?? ; 4= 1960? ; 12= 1960 ; 6= 1961? ; 1= 1961 ; 5= 1962?? ; 8= 1962? ; 1= 1962 ; 4= 1963?? ; 2= 1964?? ; 7= 1966?? ; 1= 1968 ; 1= 1971??
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):115

Collection of

Günter Kudicke (D)
Hermann Fleischanderl (A)
Jürgen Küting (D)
 
diode_oa72.jpg

OA72
 
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