Antique radios, Old Time Radios

OC75

Country:	Germany		Brand:	Valvo Radioröhrenfabrik GmbH; Hamburg
			Tube type:	Transistor Audio Frequency

Tube ID = 33808


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Identical to	OC75 = OC305
Similar Tubes	Other shape (e.g. bulb type): 2SB54 Normally replaceable-slightly different: 2G374; 2SB65; AC122; AC125; AC151; AC161; GC518; L-5021L; OC1075; OC307; OC603; OC604; OC78D; SFT103; SFT105; ST301; T-1001 Other class quality (otherwise equal): OC71 Other base and data slightly different: GE-2
First Source (s)	Mar.1957 : Valvo-Berichte
Predecessor Tubes	OC71 OC13
Successor Tubes	AC171 AC126 OC81D

Base	Wires
Was used by	Radio/TV-reception etc.
Filament
Description	PNP germanium alloy transistor intended as pre-amplifier in AF applications. All-glass body. Red dot indicates collector. Also made by Philips and related manufacturing plants. Text in other languages (may differ)
Dimensions (WHD)	5 x 15 x mm / 0.20 x 0.59 x inch
Weight	3 g / 0.11 oz
Literature	-- Collector info (Sammler) KTT 1969/70


	Braun T510: NF-Vorstufe u. Treiber Günther Stabe

Eigene Sammlung
Hermann Fleischanderl

TVT 73
Günther Stabe

Valvo_Dioden_Transistoren_1959
Thomas Günzel

Usage in Models (calculation each 25th of the month)	1= 1954? ; 3= 1958 ; 1= 1959?? ; 1= 1959? ; 14= 1959 ; 5= 1960?? ; 3= 1960? ; 25= 1960 ; 2= 1961?? ; 3= 1961? ; 53= 1961 ; 7= 1962?? ; 12= 1962? ; 46= 1962 ; 7= 1963?? ; 12= 1963? ; 34= 1963 ; 2= 1964?? ; 3= 1964? ; 13= 1964 ; 3= 1965?? ; 7= 1965 ; 1= 1966?? ; 5= 1966 ; 2= 1968?? ; 3= 1970?? ; 1= 1971 ; 1= 1975?? ;
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 270

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OC75

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