12AX7 Compatible Tubes:
12AX7 A(WA), ECC83, 7025(A), 6681, 5751, 7729, 6057, 6932, 8759, 7494, M8137, CV492, CV4004, B759, B339, ECC803(S), E83CC, E803CC

ALL TUBES ARE GUARANTEED TO BE AS DESCRIBED

NIB - New old stock in original box.

NOS - New old stock in white box.

When the TUBE # is white and underlined, click to view picture of tube.

($3.00 additional per tube when matching is required)

CLICK HERE FOR DESCRIPTION OF 12AX7 VERSIONS.

 

TUBE #

MFR

DESCRIPTION

COND.

QTY

PRICE EACH
12AX7A RCA short greyplates, round halo, 60's & 70's vintage, red logo.  GREAT TUBES FOR AMPLIFIERS. (1=NOS) NIB 4 $40
12AX7/ECC83 GE labeled Motorola, greyplates. NOS 1 $20
12AX7 SYLVANIA labeled BALDWIN, organ mfr, long greyplates, green label, 1950's or 1960's vintage, superb quality.  SPECIAL SELECT TUBES FOR ORGAN MFR's. NOS 5 $25
12AX7 SYLVANIA various labels such as FISHER & PHILCO, long greyplates. NOS 3 $18
12AX7A SYLVANIA labeled SILVERTONE, long greyplates. NOS 2 $20
5751 GE JAN 5751, military grade, X-tra support rods, greyplates, green logo, 1960's vintage.  A VERY NICE VINTAGE. NOS 2 $18

 

12AX7/ECC83 TUBE DESCRIPTIONS

12AX7/ECC83:  THESE TUBES ARE A HIGH-MU TWIN TRIODE TYPE.  THE 12AX7 AND ECC83 ARE EXACTLY THE SAME TUBE.  THE 12AX7 IS THE USA NAME/NUMBER AND ECC83 IS THE VERSION USED IN EUROPE.  THESE TUBES ARE THE ORIGINAL VERSION AND CAN ONLY BE USED IN PARALLEL HEATER APPLICATIONS.

12AX7A:  THIS TUBE IS THE SAME AS THE 12AX7/ECC83, EXCEPT THEY CAN ALSO BE USED IN SERIES HEATER APPLICATIONS.

7025:  THIS IS THE LOW NOISE INDUSTRIAL VERSION.  IT HAS SPIRAL WOUND HEATER FILAMENTS TO REDUCE HUM AND NOISE.

E83CC, 6681, CV4004, M8137, 6932, 6057:  THESE ARE PREMIUM MILITARY AND INDUSTRIAL VERSIONS.  THEY ARE MADE FOR LONG LIFE AND CAN WITHSTAND A LOT OF ON/OFF CYCLES.  THEY ARE RUGGED AND CAN COME WITH TRIPLE MICA.

B759:  A ULTRA LOW NOISE VERSION OF THE 12AX7, WITH MATCHED TRIODE ELEMENTS.  THESE TYPES WERE ONLY MADE IN ENGLAND BY GENALEX (MARCONI-OSRAM VALVE CO.) FOR THEIR GOLD LION SERIES.

5751:  THIS IS A MILITARY VERSION OF THE 12AX7.  IT HAS A LITTLE LOWER GAIN THAN THE 12AX7, BUT IS TOTALLY COMPATIBLE.  BECAUSE OF THE LOWER GAIN, IT REDUCES HUM AND NOISE.  THESE ARE RUGGED TUBES AND HAS INTERNAL TRIODE ELEMENTS THAT ARE MATCHED.  YOU CAN GET THESE WITH BLACKPLATES AND TRIPLE MICA.  THE G.E. 5-STAR AND THE RCA COMMAND SERIES ARE GREAT TUBES.

7729:  THE 7729 IS A PREMIUM GRADE TUBE MADE BY CBS/HYTRON AND HAS GOLD PLATED PINS.

ECC803(S):  PREMIUM VERSION OF THE EUROPEAN ECC83.  THESE TUBES WERE MADE FOR LOW MICROPHONICS AND LOW NOISE.  THE "S" VERSION IS SPECIALLY SELECTED FOR LOW NOISE.