Best 12AX7 listed at:

12AX7=ECC83 and Equivalents (click on links below to check stock) ECC83=12AX7 Philips / Philips Miniwatt Holland LONG RIBBED PLATES "D" getter 1950's 12AX7 Philips Miniwatt Holland 1959-1961 large "O" getter halo 12AX7 Valvo Holland 1960-1962 large "O" getter halo 12AX7 Amperex Bugle Boy Holland 1959-1962 large "O" getter halo 12AX7 Amperex Bugle Boy Holland 1962-1968 small "o" getter halo 7025 Amperex Holland 1970-1975 12AX7 Amperex Holland and Globe Logo Holland orange printing 1966-1972 12AX7 Amperex / Philips / Philips Miniwatt / Valvo Holland 1962-1969 12AX7 / CV4004 Brimar UK 1950's - 1970's 12AX7 CBS USA 1950's - 1970's 12AX7 East Germany (RFT) 1970's - 1980's 12AX7 Fivre Italy 1950's - 1960's 12AX7 GE long ribbed plates 1950 - 1965 12AX7 GE short pinched plates 1965 - 1982 12AX7 / 12AX7A JAPAN (Hitachi / Toshiba / Matshushita) 12AX7 Mullard UK "LONG RIBBED PLATES" 1954-1959 12AX7=ECC83 MULLARD UK short ribbed plates 1960's 12AX7=ECC83 MULLARD UK short ribbed plates 1970's CV4004=12AX7 Mullard UK "Box Plates" 1950's - 1981 ($299 - $375/pair) 12AX7WA / 12AX7 Philips JAN USA NOS 1980's blue printing 12AX7 Raytheon black plates and gray plates 1950's - 1970's 7025 RCA black plates and gray plates 1950's - 1970 12AX7 RCA black plates and TALL gray plates "D" getter halo 1950's 12AX7 RCA gray plates 1960's - 1970's 12AX7 Russian 1980's - 1990's 12AX7=ECC83 Siemens "LONG RIBBED PLATES" 1950's 12AX7=ECC83 Siemens Halske West Germany 1960 - 1975 12AX7 and 12AX7A Sylvania black plates and gray plates 1950's - 1960 12AX7 and 12AX7WA Sylvania gray plates 1960 - 1980's ECC803S=12AX7 Telefunken West Germany Gold Pins 1950's - 1960's 12AX7=ECC83 Telefunken Smooth Plates 12AX7=ECC83 Telefunken Ribbed Plates ECC83 / ECC803S Tesla Ribbed Plates 1980's - 1990's 12AX7 Tungsol 1950's - 1960's 12AX7 Tungsram Hungary 1970's - 1980's 12AX7 Valvo Hamburg West Germany 1950's - 1960's 12AX7 Westinghouse USA and CANADA 1950's - 1970's 12AX7 Yugoslavia / EI Yugo 1980's - 1990's

ECC83=12AX7 HOLLAND 1950's (long plates)
(sweet and very detailed sound, very articulate and dynamic with warm
 sparkly tonal balance, the best for vocal reproduction)
 
- Egnater M4 (rack-mounted "modular" preamp) 
- Victoria Regal
- Fender
- Pendulum Audio Quartet I mic pre

TO BUY 12AX7 Holland long plates 1950's
1 tube slightly microphonic $125) ECC83 Philips Miniwatt Holland used/tests like new "long plates" (mC2-delta6I=1956), copper grid posts, "D" getter halo with flat foil crossbar (1.7/2.1ma) or 47/32 and 52/32 on tv-7
12AX7 HOLLAND 1960-1970 like new and used/good (tubes in this section can be branded either PHILIPS, PHILIPS MINIWATT, VALVO) TO BUY 12AX7 Holland

12AX7 PHILIPS MINIWATT HOLLAND IMPORT 1959-1961 (LARGE ROUND GETTER HALO. These sound very similar to 12AX7 Amperex Bugle Boy Holland) - Metronome CD3 Signature - Heritage Colonial 50W - Magnum Dynalab MD108 (fm tuner) - Sonic Comments: "I received ECC83 PHILIPS MINIWATT, yesterday. Now, my tuner (MAGNUM DYNALAB MD108) sounds fantastic" "Panagiotis, Greece" TO BUY 12AX7 Holland

12AX7 VALVO HOLLAND 1960-1962 (LARGE ROUND GETTER HALO) TO BUY 12AX7 Holland


12AX7 AMPEREX BUGLE BOY HOLLAND 1956-1962 (D getter halo) - Germino Club 40 - Victoria Regal 2007 - AC30 TO BUY 12AX7 Amperex Bugle Boy

12AX7 AMPEREX BUGLE BOY HOLLAND 1962-1968 (SMALL ROUND GETTER HALO, excellent sounding 12AX7, lively upper midrange) - ART MPA Gold 2 Channel Microphone Preamp - Torres Engineering Boogie Mite - Swart Amps Atomic Space Tone TO BUY 12AX7 Amperex Bugle Boy Holland

7025 HOLLAND 1960-1971 (WHITE or ORANGE PRINTING) - CAT JL2 amp TO BUY 7025 Amperex Holland

12AX7 AMPEREX HOLLAND and "ORANGE GLOBE LOGO" 1966-1972 (ORANGE or GREEN PRINTING) - Cementer Amplification TB - 2b Tube Direct box TO BUY 12AX7 Holland
used with good value: -------------------- 1 low noise tube $40) 12AX7A Amperex Holland "Orange Globe Logo" used/good 1967 (1.64/2.0ma) 1 low noise tube $60) 12AX7A Amperex Holland used/good 1971 (2.0/2.15ma)
12AX7 PHILIPS / PHILIPS MINIWATT / VALVO HOLLAND 1962-1969 (SMALL ROUND GETTER HALO, lively and punchy sound, good bass, great upper midrange) (white printing)(similar sound to Amperex Bugle Boy Holland) - Art Audio MPA Gold pre - Fender Tremolux 1963 - Jolida TO BUY 12AX7 Holland 1960's

12AX7 PHILIPS HOLLAND 1970-1972 (lively and punchy sound, good bass, great upper midrange) (white printing)(similar sound to Amperex Bugle Boy Holland) TO BUY 12AX7 Holland 1970's

12AX7 / CV4004 BRIMAR ENGLAND (Brimar tubes are excellent in the phono section. They are very balanced from top to bottom and have low noise and microphonics) - ORANGE AD30HTC - MARSHALL - BELLARI PHONO - EAR - McIntosh SONIC COMMENTS: -------------- "Brendan, you nailed it with this recommendation for my bellari vp129 phono stage. No tube previously tried was even in the same ball park. Better than I hoped for. thanks, Blake" TO BUY CV4004=12AX7 Brimar UK
12AX7/ECC83/7025/CV492 BRIMAR ribbed plates like new or used: ------------------------------------------------------ listed below 1 slightly microphonic tube $65) 12AX7 Brimar red printing "LONG PLATES" with square getter halo 1955, used/tests high (2.10/2.30ma) (Gm=1950 and 2090)

CV4035 BRIMAR=12AX7
Type CV4035 made by STC/Brimar of England.  Internally, they are
identical to the Brimar CV4004=12AX7/ECC83, normal size and shape,
but they don't have any pins!  Instead, they have nine wire leads.
I have read an old spec sheet on these and the story is that they
thought these valves were so reliable that they would NEVER need
replacing.

CV4035=12AX7 Brimar NOS (flying leads you solder into circuit, tubes do NOT have pins) 1960's 
1 tube $40) 1962 partially faded top getter 

25) CV4069=12AU7 Brimar "Black Plates" 1969 NOS (flying leads) $40
Click here to see CV4035 and CV4069 BRIMAR FLYING LEADS NOS
12AX7 CBS USA (rare 12AX7, most made from late 1950's to early 1960's) TO BUY 12AX7 CBS

12AX7 EAST GERMANY (RFT) TO BUY 12AX7 East Germany (RFT)

12AX7 FIVRE MILANO ITALY TO BUY 12AX7 Fivre Italy

12AX7 / 7025 GE "TALL RIBBED PLATES" 1950-1965 (1950's - early 1960's GE 12AX7 with long gray ribbed plates have a warm musical presence, are balanced and sweet) TO BUY 12AX7 GE

12AX7 / 12AX7A / 12AX7WA GE 1965-1982 (Also see 5751, 5751 is a direct pin replacement for 12AX7/A, but mu is reduced from 100 to 70) - Fender Champ Reissue 1957 - Fender Deluxe Reverb 1964 - PrimaLuna ProLogue Five Integrated amp 12AX7 pinched plates 1960's: white printing --------------------------- TO BUY 12AX7 and 12AX7A GE
0 platinum low noise tube $60) 12AX7 GE Canada NOS early 1960's (1.70/1.76ma) (Gm=1700 and 1745) 0 low noise tube $55) 12AX7 GE NOS 1960's smeared printing (1.6/1.8ma) (Gm=1630 and 1730) 0 platinum tube $29) 12AX7 GE 1960's used/good 1960's (1.56/1.65ma) (Gm=1630 and 1690) 0 low noise tube $25) 6681=12AX7 GE USA in GE Canada boxes NOS mismatched sections (1.5/2.15ma) (Gm=1700 and 1930) 12AX7A or 7025 pinched plates 1960's - 1980's: --------------------------------------------- 0 platinum low noise tube $30) 12AX7A GE NOS/70% 1978 (1.5/1.6ma) 0 low noise tube $20) 12AX7A GE branded Hewlett Packard used/good 1970's (Gm=1620 and 1780) 12AX7WA GE 1960's - 1987: ------------------------ TO BUY 12AX7WA GE

12AX7 / 12AX7A JAPAN Hitachi / Matsushita / Toshiba TO BUY 12AX7 HITACHI JAPAN
Matsushita - same build as Mullard 12AX7: (Mullard tooling) ----------------------------------------- TO BUY 12AX7 MATSUSHITA JAPAN
1 tube $25) 12AX7 Matsushita Japan like new 1960's very good printing (Gm=1535/1610) 1 tube $25) 12AX7 Matsushita Japan like new 1960's very good printing (Gm=1570/1695) 1 platinum tube $20) 12AX7 Matsushita Japan rebranded Philips used/good 1960's (Gm=1610/1625) 1 platinum tube $20) 12AX7 Matsushita Japan rebranded Philips used/good 1960's (Gm=1620/1680) Toshiba Electric (Tokyo Shibaura Electric): ------------------------------------------ TO BUY 12AX7 TOSHIBA JAPAN
1 low noise tube $29) 12AX7 EMERSON JAPAN like new 1965 very good white printing 1 low noise tube $20) 12AX7A Realistic Lifetime Taiwan also branded JAPAN gold-plated pins used/like new 1960's - 1970's fair yellow printing (pinched plates like GE)
12AX7 MULLARD "LONG RIBBED PLATES" 1958 (f91 series) (the long plate Mullards are one of the best sounding 12AX7 ever made; very sweet, great mids) (excellent for vocals, rich and harmonically textured) - Victoria - Bogner Ecstasy - Bad Cat - Sur SL-68 (hand wired) [ SUHR AMPS) ] TO BUY 12AX7 Mullard Long Plates 1950's

12AX7=ECC83 MULLARD "RIBBED PLATES" NOS 1960's (12AX7 Mullard 1960's vintage have great midrange tone and bass, an excellent 12AX7, 161 or 163 date codes) - Top Hat King Royale - Soldano SLO-100 (Mark Knopfler, Eric Clapton) - Marshall 1959HW Plexi - Marshall JVM-210H 2007-2008 - Diezel Herbert head - Gibson GA-6 1957 - Trace Elliot C30 - Mesa Boogie Triaxis 2 preamp - Mesa Boogie Mark 2C+ 1984 - Goodsell Super 17 M.K. 2 head - Jolida CD player - Landgraff Custom 50W - Lexicon Signature 284 - Two Rock TO BUY 12AX7 Mullard ribbd plates 1960's
SONIC COMMENTS: -------------- "About a month ago I purchased a NOS Mullard and Brimar 12AX7's which are absolutely fabulous. You had tipped me off to your stock of NOS "Mazda" labeled Brimar 12AX7's. Since you recommended them if I liked the Brimars, I am interested in purchasing a couple in just a few days here. Do you still have some? I had to tell you that since I have gotten the Siemen EL34's and Mullard 12AX7 in V1 and Brimar in V2 of my Marshall as you recommended, the performance sound and feel of the amp have become simply amazing. On that note, I wish to by all of my future tubes through you. Thank you very much,
Robert"

12AX7=ECC83 MULLARD "RIBBED PLATES" 1970's (12AX7=very detailed bass, musical mids and smooth top end, the older the better) - McIntosh - Prima Luna - Art Pro Audio MPA - Scott - Hovland - Audio Space Ref. 2 (2011) - Komet 60 TO BUY 12AX7 Mullard ribbed plates 1960-1975
0 low noise tube $0) 12AX7 Mullard branded "12AX7A Amperex Globe Logo" 1971 used/good in white box 0 low noise tube $0) 12AX7 Mullard branded "12AX7A Amperex Globe Logo" 1975 low hours/tests like new in white box 0 low noise tube $0) 12AX7 Mullard branded "12AX7A Amperex Globe Logo" 1974 used/50-55% in white box 0 low noise tube $0) 12AX7 Mullard new logo 1977 used/65% in white box Click here to see 12AX7 and CV4004 Mullard 1956-1981
CV4004=M8137 MULLARD BOX PLATES 1957 - 1981 (CV4004=balanced and smooth sounding with excellent midrange, recommended) - Line Magnetic 518 (845 SET) - EAR 834P - EAR 864 - Aestetix Rhea phono - Aestetix Calypso, Io phono - Art Audio phono - Audio Research linestage - Shindo linestage - Jolida 1000 CD player - CAT SL-1 Signature Mark III preamp - Fender Pro Reverb 1967 - PATHOS ACOUSTICS T.T. HYBRID INTEGRATED AMPLIFIER (INPOL) - Belari 129 phono TO BUY CV4004 MULLARD PAIRS
CV4004 Mullard NOS 1981 listed below in original factory wrapping TO BUY CV4004 MULLARD PAIRS
M8137=CV4004 Mullard: ------------------- TO BUY M8137=CV4004 MULLARD
Customer Comments on the CV4004 Mullards: ------------------------------------------- "The 1981 Mullard CV4004s you supplied last week sound fantastic. A quantum improvement over the Chinese Gold Aeros that they replaced in my Cal Alpha DAC. The Mullards seemed to take about 20 hours to do most of their break-in, but they sounded better than the old tubes from the first moment and may still be getting more effortless and yet more detailed in their sound after 30 hours. The upper treble is super-sweet -- reminds me of silver vs. copper cabling. Those 4004's seemed terribly expensive to me, but seemingly worth it, especially if they outlast me, as I hope they will. Many thanks for steering me in that direction in the baby-blue quadrants at the top of the 12AX7 page." "I can now understand why there is so much hoo-haa about NOS valves! In my EAR 834P phono stage, The NOS Mullard CV4004 box plates are simply sensational. They leave the stock Chelmer 12AX7’s for dead, and elevate the musicality of an already musical phono stage to unbelievable levels. This is achieved via much increased warmth, weight, air and space. The midrange, particularly on female vocals is “to die for”. And they haven’t even burned in properly. Also, Brendan’s level of service is lightning fast, and the quality of his products, judging by the music I am hearing, is second to none. This has been a real ear-opener, and money very well spent. Thank you! Richard, Australia"
12AX7WA=7025 PHILIPS USA (best value) (late production Sylvania; open extended highs, neutral, clear, nice headroom) - Rogue Cronos Magnum TO BUY 12AX7WA PHILIPS
1 platinum tube $49) 12AX7WA=7025 Philips JAN USA NOS 1986 (Gm=1980/2030) Low Noise Pairs) 12AX7WA=7025 Philips JAN USA NOS 1986-1987 blue printing (best value) 1 platinum pair $90) Gm=1780/1880 and 1770/1870 1 platinum pair $90) Gm=1700/1770 and 1730/1810 1 platinum pair $90) Gm=1805/1820 and 1815/1845 (best pair) 1 platinum pair $90) Gm=1850/1900 and 1870/1900 (best pair) 1 platinum pair $90) Gm-1985/2075 and 1990/2025 1 platinum pair $90) Gm=1700/1800 and 1680/1790 1 platinum pair $90) Gm=1950/2000 and 1930/1970 1 platinum pair $90) Gm=1830/1930 and 1860/1940 0 tube $45) Gm=1990/2140 1 tube $45) Gm=1850/2000 1 tube $45) Gm=1825/1925 1 tube $45) Gm=1740/1850
12AX7 RAYTHEON USA BLACK AND GRAY PLATES - Cayin A-50T - Bad Cat 'Custom Shop' Cub II R 1 x 12 Combo Tube Amplifier - THOR phono stage - Rogue Cronus - Rogue Tempest Int. - Fender - CAT JL-2 amp - Broskie Aikido PH1 - Rogers High Fidelity EHF-100 2011 - Quicksilver - Aguilar DB750 bass amp - Carver 180 amp TO BUY 12AX7 RAYTHEON 1962
12AX7 RAYTHEON BLACK PLATES 1962: -------------------------------- 1 platinum low noise pair $295) JRP-12AX7 Raytheon tall-ribbed "Black Plates" NOS original boxes 1962, orange printing, "o" getter halo - best pair 1 tube) Gm=1845/1875 1 tube) Gm=1850/1870 1 platinum low noise pair $275) JRP-12AX7 Raytheon tall-ribbed "Black Plates" NOS original boxes 1962, orange printing, "o" getter halo 1 tube) Gm=1825/1925 1 tube) Gm=1820/1945 1 platinum low noise pair $250) JRP-12AX7 Raytheon tall-ribbed "Black Plates" NOS original boxes 1962, orange printing, "o" getter halo 1 tube) Gm=1665/1795 1 tube) Gm=1670/1775 1 platinum low noise pair $250) JRP-12AX7 Raytheon tall-ribbed "Black Plates" NOS original boxes 1962, orange printing, "o" getter halo 1 tube) Gm=1675/1680 1 tube) Gm=1660/1715 1 platinum low noise pair $240) JRP-12AX7 Raytheon tall-ribbed "Black Plates" NOS original boxes 1962, orange printing, "o" getter halo 1 tube) Gm=1640/1645 1 tube) Gm=1615/1635 0 platinum low noise pair $0) JRP-12AX7 Raytheon tall-ribbed "Black Plates" NOS original boxes 1962, orange printing, "o" getter halo 0 tube) Gm=1710/1810 0 tube) Gm=1710/1800 SINGLE TUBES: ------------ 1 platinum low noise tube $109) JRP-12AX7 Raytheon black ribbed plates NOS 1962 slightly tilted glass (Gm=1720 and 1750) 1 platinum low noise tube $120) JRP-12AX7 Raytheon black ribbed plates NOS 1962 slightly tilted glass (Gm=1840 and 1850) low noise tubes) JRP-12AX7 Raytheon tall-ribbed "Black Plates" NOS original boxes 1962, orange printing, "o" getter halo 1 tube $125) Gm=1660 and 1730 1 tube $125) Gm=1760 and 1840 1 tube $125) Gm=1780 and 1900 12AX7 Raytheon black plates SQUARE getter halo 1950's: ------------------------- 1 low noise tube $20) 12AX7 Raytheon black ribbed plates square getter halo used/50% mid-1950's ROUND getter halo early 1960's: ------------------------------ 1 Low Noise tube $95) 12AX7 Raytheon black ribbed plates NOS round getter halo in white boxes early 1960's (recommended) 12AX7 RAYTHEON GRAY PLATES 1954-1960: ----------------------------------- listed below - (recommended and oldest 12AX7's in stock) - pairs sold out - rare 12AX7 1 low noise tube $135) US Army-12AX7 Raytheon gray ribbed plates NOS 1954 original box (2.6/2.78ma) 1 low noise tube $135) US Army-12AX7 Raytheon gray ribbed plates NOS 1954 original box (2.5/2.8ma) 1 low noise tube $95) 12AX7 Raytheon NOS gray ribbed plates, fair printing, in white box around 1960 SONIC COMMENTS in EAR 834P phono pre: ------------------------------------ It’s a funny thing about the 12AX7’s. The preamp stock tubes were Chinese. They are specially picked by the the manufacturer for low-noise and are even labeled “Eastern Electric” on the tubes. They actually sounded good to me and I originally wondered if I even needed NOS. Upon installing the new 12AX7 Raytheon black plates I was immediatally struck by the improvements. The sound suddenly became more dynamic and three dimensional. It occurred to me that with the stock tubes the sound was like a flat picture with washed out colors. With the NOS tubes the picture was much more vivid and lifelike. But I only noticed how inferior the Chinese tubes were when I installed the NOS tubes. It makes me wonder how many people are listening to their tubed equipment, never knowing how much better it could sound.
7025 RCA BLACK PLATES 1950's / GRAY PLATES 1960's - 1970's (very dynamic, rich, silky and sparkly sounding with a tight bottom end and clear-warm top-end, these are the BEST 7025) (low noise, low microphonics, also see 5751 RCA for substitute. These are superb as input tubes in guitar amps) - Vincent CD-S6 CD Player - Dumble Overdrive Special clone amp - Fender Twin Reverb 1964, 1966, 1990 - compressor - Two-Rock Custom Reverb Signature V1 TO BUY 7025 RCA
7025 RCA 1950's - 1970's GRAY PLATES: (highly recommended, low noise, open, clear, sweet and smooth) ------------------------------------ 1 low noise tube $120) 7025 RCA gray "long plates" NOS in white box late-1950's - D getter halo - very good printing - slightly mismatched sections (1.7/2.1ma) (Gm=1550/1900) 1 platinum low noise tube $99) 7025 RCA gray "long plates" low hours/like new in white box 1960's - some printing (Gm=1900/1910) 1 Low Noise tube $65) 7025 RCA gray ribbed plates NOS 1960's in white box some printing mis-matched sections (Gm=1600/1940) 1 Low Noise tube $65) 7025 RCA gray ribbed plates NOS in white box poor printing around 1970 (Gm=1550/1650) (good value) USED SINGLE TUBES: ----------------- 1 platinum low noise tube $99) 7025 RCA gray "long plates" with "D getter halo" rebranded "TENTRON" used/tests like new in white box 1959 (Gm=2060/2150) very strong 1 low noise tube $39) 7025 RCA gray ribbed plates used/50-60% some printing 1960's (1.15/1.2ma) (Gm=1380/1390)
12AX7 RCA USA BLACK PLATES "D" GETTER 1950's (super 12AX7, outstanding upper midrange) - Fender Deluxe Reverb 1964, 1966 - UESUGI TAE-4 phono 2008 TO BUY 12AX7 RCA Black Plates 1950's

12AX7 RCA TALL GRAY PLATES "D" GETTER 1950's TO BUY 12AX7 RCA Gray Plates 1950's
1 Platinum Low Noise tube $139) 12AX7 RCA TALL Gray Plates NOS "D" getter halo mid-1950's - red printing (LU) date code (Gm=1770/1795) best single 1 Platinum Low Noise tube $139) 12AX7 RCA TALL Gray Plates NOS "D" getter halo mid-1950's - red printing (LZ) date code (Gm=1870/1890) best single 1 Low Noise tube $125) 12AX7 RCA TALL Gray Plates NOS "D" getter halo original box 1958 - white printing (Gm=1675/1790) 1 Low Noise tube $125) 12AX7 RCA TALL Gray Plates NOS "D" getter halo mid-1950's - red printing (MA) date code (Gm=1655/1760) 1 Platinum Low Noise tube $99) 12AX7 RCA TALL Gray Plates like new "D" getter halo mid-1950's - red printing - (LQ) date code (Gm=1620/1635)
12AX7 / 12AX7A RCA USA GRAY PLATES (nice detail with a smooth and sweet sound, best sounding US made 12AX7 are RCA and Tungsol) - Fender Princeton Reverb - Fender Super 6 Reverb 1970's - Fender Champ 1972 - VOX AC15 - Fender '64 Vibroverb - SUPRO model # 1616T - Conrad Johnson MV60SE - Shanling CD-S100SE HDCD player - Universal 175 - Teletronix LA-2A Compressor/Limiter - Behringer T1954 Ultrafex - Conrad Johnson MV60 2002 - McIntosh C8 phono 12AX7A RCA USA NOS: ------------------ PAIRS: ----- TO BUY 12AX7A RCA
SINGLE TUBES: ------------ 1 low noise tube $75) 12AX7A RCA NOS 1960's some printing (Gm=1680 and 1760) 1 low noise tube $65) 12AX7A RCA NOS 1960's poor printing (Gm=1615 and 1750) 1 low noise tube $70) 12AX7A RCA NOS 1960's poor printing (Gm=1660 and 1760) 1 low noise tube $35) 12AX7A RCA NOS/65% 1970 poor printing (Gm=1490 and 1500) 1 low noise tube $30) 12AX7A RCA NOS 1974 mismatched triode sections 1 section 65% 1 section 100% (1.9/3.1ma) 12AX7A RCA CANADA NOS: --------------------- 1 Low Noise tube $50) 12AX7A/7025A RCA Canada TALL gray ribbed plates NOS/75% "D" getter halo - 1963 (1.44/1.56ma) 1 Low Noise tube $39) 12AX7A/7025A RCA Canada pinched plates like GE NOS 70% 1960's (1.3/1.45ma) slightly tilted glass 12AX7A RCA USA used/test like new and used/good: ----------------------------------------------- sold) 12AX7A RCA used/like new 1960's - some printing (Gm=1780/1835) (recommended) 1 tube $49) 12AX7A RCA used/good 1960's - some printing (Gm=1660/1730) 1 tube $39) 12AX7A RCA used/tests like new, slightly mismatched sections, smeared printing (Gm=1740/2000) 1 tube $29) 12AX7A RCA used/70% branded CONRAC (Gm=1520/1540) 12AX7A RCA MEXICO: ----------------- 1 low noise tube $30) 12AX7A RCA MEXICO NOS 1970's (1.67/1.87ma) (good value)
12AX7=ECC83 RUSSIAN 1 low noise tube $20) 12AX7WXT+ Sovtek NOS late 1990's in white box, black printing
12AX7=ECC83 SIEMENS "Long Ribbed Plates" 1950's (open and airy, rare 12AX7) - Fisher 400 CX-2 - Diva Audio M7 preamp TO BUY ECC83=12AX7 Siemens Germany ribbed plates

12AX7=ECC83 / E83CC SIEMENS WEST GERMANY 1960-1975 (ECC33=12AX7: clear/transparent, detailed, lots of inner-resolution, extended high-end, tight accurate bass and mids) (E83CC=Special Quality 10,000+ hour 12AX7, very low noise, highly recommended for phone stages) - AESTHETIX IO PHONO (the best possible tube for this phono, nothing compares) these SIEMENS will be at CES 2009 in the RUNNING SPRINGS AUDIO room in their AESTHETIX GEAR - Icon Audio power supply - EAR 834P - AESTHETIX IO PHONO TO BUY ECC83=12AX7 Siemens Germany ribbed plates

12AX7 SYLVANIA GRAY and BLACK PLATES 1950's - 1960 12AX7 SYLVANIA GRAY PLATES 1950's "The Sylvania 12AX7 gray plates 1950's are "out of this world"!!!!!!! Thanks again." TO BUY 12AX7 Sylvania

12AX7 / 12AX7A / 7025 SYLVANIA GRAY PLATES 1960 - 1970's - Clark Amplification Anthony Wilson Model 112 Combo TO BUY 12AX7 Sylvania

12AX7WA=7025 SYLVANIA USA 1960 - 1970's - Audio Note M2 phono balanced TO BUY 12AX7WA Sylvania
4 Low Noise Pairs $89/pair) 12AX7WA Sylvania JAN NOS in original boxes and white boxes, most boxes are water damaged 1972-1978, most are 1974 (recommended, open-clean-crisp, high gain)
ECC803S=12AX7 TELEFUNKEN WEST GERMANY to see ECC803S TELEFUNKEN STOCK AND PICTURES

12AX7 TELEFUNKEN SMOOTH PLATES NOS (excellent preamp 12AX7, low noise, very smooth extended highs, very good in phono stages, low noise) Se Electronics Z5600a II Tube Condenser mic Veloce Audio Line Stage and Phono Amp Nagra PL-L preamp VTL 7.5 preamp MFA preamp Orange amps Conrad Johnson Premier 15 phono preamp Pilot SP-210 preamp Jadis preamp Aesthetix Rhea, Io, Calypso George Wright phono THD Plexi-50 MXL V69 Mogami Edition Tubetech CL1B Audio Thrills phono AKG mic Bellari VP130 phono TO BUY 12AX7 Telefunken smooth plates

12AX7/ECC83 Telefunken Diamond Bottom Smooth Plates used/tested:
(the smooth plate 12AX7 has a more balanced sound than a rib plate and great upper midrange with good high-end detail and extension)

Perfect Printing = almost 100% printing on tube
Good Printing = 75%+ of printing on tube
Fair Printing = 50%+ of printing on tube
Poor Printing = less than 50% printing on tube or no printing

TO BUY 12AX7 Telefunken smooth plates
Sonic Comments in Aesthetix Calypso: ----------------------------------- Tubes work just fine!!!! Listened to Dave Matthews with the old tubes and then popped in the Tele's and as they warmed up.....boy....what a nice difference. I heard a more smoothed and refined voicing... After that put on Tori Amos' Scarlet walk and the Tele's really started to shine!!! Highs were crystal clear, mids and piano were snappy and Amos' voice was just "right there". Thanks, Steve
12AX7 TELEFUNKEN RIBBED PLATES NOS (excellent preamp tube, nice resolution, balanced, quiet, articulate, not warm and fuzzy) - EAR 834P - LAMM amp - Coincident Statement Phono Stage TO BUY 12AX7 Telefunken ribbed plates

12AX7/ECC83 Telefunken Ribbed Plates used/tested:

Perfect Printing = almost 100% printing on tube
Good Printing = 75%+ of printing on tube
Fair Printing = 50%+ of printing on tube
Poor Printing = less than 50% printing on tube, smeared printing/no printing

SINGLE TUBES:
------------

1 low noise tube $85) 12AX7 Telfunken branded FISHER used/good 1960's fair printing (Gm=1900/1950) strong output


1 low noise tube $75) 12AX7 Telefunken ribbed plate used/good around 1960 some printing (Gm=1805/1825) (recommended)


1 low noise tube $85) 12AX7 Telefunken ribbed plate used/good 1959 (rc) date code - very good printing (Gm=1715/1850) (recommended)


1 low noise tube $39) 12AX7 Telefunken ribbed plate used/good 1961 very good printing (Gm=1500/1800) (best value for guitar amp)


1 low noise tube $65) 12AX7 Telefunken ribbed plate used/good 1960's smeared printing (Gm=1700/1800)


1 low noise tube $75) 12AX7 Telefunken ribbed plate used/good 1960's smeared printing (Gm=1760/1860)


ECC803S=12AX7 Tesla Rožnov Gold Pins (NOS STOCK, very low noise, special quality 12AX7) (XN date code = November 1989, 32=Prague?) - Allen Sweet Spot 2008 - Behringer T1953 Tube Ultragain Dual Microphone Preamp - Blackstar HT-5 (some people think these are rebranded JJ, but I am not sure of this, they are Czech made, test outstanding, and are very low noise) TO BUY ECC803S TESLA 1989

12AX7 / 12AX7A / 7025 TUNGSOL USA (one of the best US 12AX7 ever made, very dynamic and musical with superb tonal balance, better overall than RCA) TO BUY 12AX7 Tungsol 1951-1960's
1 low noise tube $75) JTL-12AX7 Tungsol "D" getter (232=1952) used/good in white box (Gm=1610/1660)

1 low noise tube $39) 12AX7 Tungsol used/good "O" getter 1963 in white box very good printing (Gm=1530/1600)

1 platinum low noise tube $75) 12AX7 Tungsol branded GAP/R COMPUTOR TUBE "D" getter used/tests like new 1958 in white box fair printing (Gm=1830/1850)

1 platinum low noise tube $65) 12AX7 Tungsol branded GAP/R COMPUTOR TUBE "O" getter used/tests like new 1962 in white box fair printing (Gm=1780/1820) (12AX7 printed on other side of tube)

1 low noise tube $50) 12AX7 Tungsol "D" getter used/good 1954 in white box, faded top getter (Gm=1660/1715)


12AX7 TUNGSRAM HUNGARY (these typically have very low noise and are under-rated 12AX7's, copper grid posts) TO BUY 12AX7 Tungsram

12AX7 VALVO, HAMBURG WEST GERMANY TO BUY 12AX7 VALVO 1950's

12AX7 WESTINGHOUSE USA / CANADA (recommended, very high quality 12AX7, best in stock for the money) 12AX7 Westinghouse "Black Plates" 1950's: ---------------------------------------- 1) 12AX7 Westinghouse Canada Black Plates NOS large "D" getter 1950's $100 GRAY PLATES: ----------- l low noise tube $60) 12AX7 Westinghouse Reliatron tall gray ribbed plates "D" getter like new 1953 very good printing (Gm=1810/1860)
12AX7 / 7025 Yugoslavia / EI Yugo (smooth plates) (Telefunken smooth plates copy) TO BUY 12AX7 Yugoslavia (EI YUGO)

12AX7 / 7025 Chinese 0 tube $15) 7025A Chinese rebranded International Servicemaster Yugoslavia NOS 1990's in white box 0 tube $15) 12AX7 Chinese rebranded ECC83 Siemens NOS 1993 in white box 0 tube $12) 12AX7A Chinese NOS with red printing "12AX7A" on glass


What's the best sounding European-made 12AX7 of all time in YOUR opinion?

What's the best sounding USA/Canadian-
made 12AX7 of all time in YOUR opinion?