Antique radios, Old Time Radios

12AX7

ID = 3730

Country:

Worldwide

Brand:	Common type Worldwide tube/semicond. Common type Worldwide tube/semicond. RCA Victor Radio S.A., São Paulo Telefunken Deutschland (TFK), (Gesellschaft für drahtlose Telegraphie Telefunken mbH
Developer:	RCA (RCA Victor Co. Inc.); New York (NY)
Tube type:	Double Triode Audio Frequency

Identical to

12AX7 = 95-127-01 = CV492 = CM1 = B759 = ECC83

Similar Tubes

Normally replaceable-slightly different:

0AX7 ; 12AX7-TII ; 12AX7A ; 12AX7EH

Other class quality (otherwise equal):

12AX7S ; 12AX7WA ; 12AX7WAH ; 12AX7WXT ; 12DF7 ; 7025 ; CV4004

Other characteristic (electr. data):

12AY7 ; 6N4_China

Heater different:

6AX7 ; 7058

Other base and data slightly different:

2C52

Other base and other heater:

6EU7 ; ECC808

Differences not known by us:

12AX7B

Multiple differences or of other kind:

12AD7 ; 6DR4 ; 7729

First year

1949 -- Collector info (Sammler) >10 models start 1949. None 1948 for sure.

First Source (s)

25.Sep.1947 : Electron Tube Registration List 606

Predecessor Tubes

6SL7GT 7F7 12SL7GT 6SL7

Successor Tubes

ECC83 5751 CK5751 5751WA 7729 7025 6057 7025A

Base

Noval, 9 pin miniature (USA pico-9) B9A (Codex=No 15)

Was used by

Radio/TV-reception etc.

Filament

Vf 12.6 Volts / If 0.15 Ampere / Indirect / Specified voltage AND current AC/DC

Description

High-mu miniature twin-triode, intended as general purpose high-gain amplifier, it found its elective use in low-level audio preamplifiers.

Tube prices

14 Tube prices (visible for members only)

Information source

Essential Characteristics, GE 1973
Taschenbuch zum Röhren-Codex 1948/49

12AX7: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse Karel De Reus †
12AX7: RTT 1974 (Franzis) 13. Auflage Martin Renz More ...	Just Qvigstad	12AX7 Dirk Taekels More ...

Usage in Models

3= 1949?? ; 8= 1949? ; 7= 1949 ; 18= 1950?? ; 48= 1950? ; 8= 1950 ; 3= 1951?? ; 45= 1951? ; 2= 1951 ; 2= 1952?? ; 86= 1952? ; 19= 1952 ; 11= 1953?? ; 22= 1953? ; 30= 1953 ; 13= 1954?? ; 61= 1954? ; 112= 1954 ; 69= 1955?? ; 170= 1955? ; 167= 1955 ; 49= 1956?? ; 391= 1956? ; 144= 1956 ; 14= 1957?? ; 186= 1957? ; 76= 1957 ; 31= 1958?? ; 294= 1958? ; 312= 1958 ; 21= 1959?? ; 487= 1959? ; 400= 1959 ; 176= 1960?? ; 135= 1960? ; 145= 1960 ; 20= 1961?? ; 82= 1961? ; 98= 1961 ; 28= 1962?? ; 162= 1962? ; 99= 1962 ; 19= 1963?? ; 102= 1963? ; 72= 1963 ; 15= 1964?? ; 62= 1964? ; 46= 1964 ; 80= 1965?? ; 18= 1965? ; 52= 1965 ; 16= 1966?? ; 21= 1966? ; 25= 1966 ; 5= 1967?? ; 10= 1967? ; 20= 1967 ; 17= 1968?? ; 13= 1968? ; 16= 1968 ; 6= 1969?? ; 2= 1969? ; 15= 1969 ; 20= 1970?? ; 4= 1970? ; 7= 1970 ; 7= 1971? ; 6= 1971 ; 2= 1972?? ; 4= 1972? ; 3= 1972 ; 2= 1973?? ; 2= 1973 ; 3= 1974? ; 3= 1974 ; 4= 1975?? ; 1= 1975? ; 4= 1975 ; 3= 1976 ; 5= 1977? ; 3= 1977 ; 1= 1978?? ; 1= 1978 ; 1= 1979?? ; 2= 1979? ; 1= 1979 ; 1= 1980 ; 2= 1981 ; 4= 1982 ; 1= 1983 ; 2= 1984 ; 2= 1986 ; 1= 1988 ; 1= 1992?? ; 1= 1992 ; 1= 1993 ; 1= 1996 ; 1= 1997?? ; 2= 2000 ; 1= 2001 ; 1= 2002 ; 1= 2004? ; 1= 2005 ; 1= 2006?? ; 3= 2006? ; 1= 2006 ; 2= 2008 ; 1= 2009? ; 1= 2011? ; 1= 2014 ; 1= 9999?? ; 5= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):5015

Collection of

12AX7

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12AX7

Common type Worldwide tube/semicond.

Collection of