12AX7

July 6, 2008 | Leave a Comment

The 12AX7 is a high-mu twin triode which operates in typical service as a class A amplifier, in the preamp stages of high fidelity, musical instrument, and public address amps, as well as professional line and microphone preamps, and many other audio and communications devices. The demand for the vintage USA and European versions of this tube are beginning to outstrip the supply, and, as a buyer, you need to carefully consider what is available, the device you will use it in, and what your budget allows. The highly regarded vintage brands of Telefunken, Mullard, Amperex, and RCA come at an appropriate premium price over other brands. While this higher price is justified (these tubes sound wonderful and are very long lived) other vintage brands are often just as good. Brands like GE, Sylvania, Tung-Sol, Motorola, Raytheon, and Zenith are often overlooked, but usually perform just as well as the more famous vintage brands, which makes them a terrific value, especially as the stocks of New Old Stock (NOS) tubes vanishes. Indeed, some of these were made by RCA for these other labels, and others like the Tung-Sol and Sylvania have their own followers who prefer these brands over the higher priced premium labels. There is intense hype out there about the 12AX7, and even some absolute fantasies. Some of the European labels have strong snob appeal, which can cloud accurate judgment of these very good tubes, and many self-proclaimed tube experts have either praised or shot down some vintage brands which deserve neither. If you are new to tubes in general, or are replacing a set of Russian or Chinese current production 12AX7 tubes with vintage NOS, you would do well to try several different brands and hear for yourself the sonic nuances. Then you would be well advised to lay in a stock of the brand of your choice "for a rainy day".




ONE RCA 12AX7 OR 12AX7A Vacuum Tube Hickok 539c TESTED
ONE RCA 12AX7 OR 12AX7A Vacuum Tube Hickok 539c TESTED
$19.99 (1 Bid)
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138304 95 1253 POWER TRANSFORMER TUBE AMP GUITAR 12AX7 6L6 6V6 5Y3 12AU7 5E3
138304 95 1253 POWER TRANSFORMER TUBE AMP GUITAR 12AX7 6L6 6V6 5Y3 12AU7 5E3
$19.95
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Raytheon 12ax7 black plate matched pair
Raytheon 12ax7 black plate matched pair
$79.99
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Mullard 7025 12AX7 ECC 83 matced pair
Mullard 7025 12AX7 ECC 83 matced pair
$99.99
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2 Vintage RCA 12AX7 ECC83 Vacuum Tubes Results  1180 1150 1350 1120 64872
2 Vintage RCA 12AX7 ECC83 Vacuum Tubes Results 1180 1150 1350 1120 64872
$58.99
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2 Vintage Ge 12ax7 ECC83 Vacuum Tubes
2 Vintage Ge 12ax7 ECC83 Vacuum Tubes
$43.99
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2 Vintage RCA 12AX7 A ECC83 Vacuum Tubes 47 43 43 39 56274
2 Vintage RCA 12AX7 A ECC83 Vacuum Tubes 47 43 43 39 56274
$53.99
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2 Vintage Motorola Mobile 12AX7 ECC83 7058 Stereo Tubes 1350 1340 1320 1310
2 Vintage Motorola Mobile 12AX7 ECC83 7058 Stereo Tubes 1350 1340 1320 1310
$53.98
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One 1966 Mullard Amperex 12AX7A ECC83 tube Hickok TV7B tests 38 41 min32 32
One 1966 Mullard Amperex 12AX7A ECC83 tube Hickok TV7B tests 38 41 min32 32
$32.95
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Hammond 12AX7a ECC83 Vacuum Tube
Hammond 12AX7a ECC83 Vacuum Tube
$20.00
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Hammond 12AX7 ECC83 Vacuum Tube
Hammond 12AX7 ECC83 Vacuum Tube
$20.00
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One 1966 Mullard GE 12AX7A ECC83 tube Hickok TV7B tests  35 36 min32 32
One 1966 Mullard GE 12AX7A ECC83 tube Hickok TV7B tests 35 36 min32 32
$18.95
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Ceramic 9 pin 12AX7 tube socket with shield top mount fits Fender set of 10
Ceramic 9 pin 12AX7 tube socket with shield top mount fits Fender set of 10
$29.00
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Shuguang Tube Kit For Ampeg SVT CL12AX7 12AU7 6550Guitar Amplifer Tube Kit
Shuguang Tube Kit For Ampeg SVT CL12AX7 12AU7 6550Guitar Amplifer Tube Kit
$242.00
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One 1965 Mullard GE 12AX7A ECC83 tube Hickok TV7B tests  48 42 min32 32
One 1965 Mullard GE 12AX7A ECC83 tube Hickok TV7B tests 48 42 min32 32
$39.95
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50pcs 9Pin Tube sockets Shield Cover for audio AMP 12AX7 12AU7 ECC82 ECC83 DIY
50pcs 9Pin Tube sockets Shield Cover for audio AMP 12AX7 12AU7 ECC82 ECC83 DIY
$42.46
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1 NOS Raytheon JAN 5751 12AX7 Rare Windmill Getter Tube USA
1 NOS Raytheon JAN 5751 12AX7 Rare Windmill Getter Tube USA
$109.99
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Vintage Baldwin by SYLVANIA 12AX7 Tall Plate Amp Radio Preamp USA Vacuum Tube
Vintage Baldwin by SYLVANIA 12AX7 Tall Plate Amp Radio Preamp USA Vacuum Tube
$5.00 (8 Bids)
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MULLARD RCA 12AX7A ECC83 TESTSASNEW Stereo Guitar Pre Amp Audio Tube OEM Part
MULLARD RCA 12AX7A ECC83 TESTSASNEW Stereo Guitar Pre Amp Audio Tube OEM Part
$49.95
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Dean Markley Overlord Classic Tube Overdrive 12AX7 Vintage Guitar Effect Pedal
Dean Markley Overlord Classic Tube Overdrive 12AX7 Vintage Guitar Effect Pedal
$149.00
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Sovtek 12AX7LP 12AX7 ECC83 pre amp tubesNEW
Sovtek 12AX7LP 12AX7 ECC83 pre amp tubesNEW
$12.33
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Build and LEARN about a TUBE EL84 6BQ5 Twin Coupled Amp 12AU7 12AX7 6BQ5
Build and LEARN about a TUBE EL84 6BQ5 Twin Coupled Amp 12AU7 12AX7 6BQ5
$20.00
Time Remaining: 2h 15m
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Vintage Knight by MULLARD 12AX7A ECC83 Amp Preamp Vacuum Tube 12AX7 GT BRITAIN
Vintage Knight by MULLARD 12AX7A ECC83 Amp Preamp Vacuum Tube 12AX7 GT BRITAIN
$9.60 (8 Bids)
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10pcs 19MM Tube Dampers Silicone Ring fit 12AX7 12AU7 12AT7 12BH7 EL84 tube amps
10pcs 19MM Tube Dampers Silicone Ring fit 12AX7 12AU7 12AT7 12BH7 EL84 tube amps
$4.58
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Sylvania 12AX7A Vintage Tube Long Gray Plate Round Getter Copper Rods Test 67
Sylvania 12AX7A Vintage Tube Long Gray Plate Round Getter Copper Rods Test 67
$9.60
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Sylvania 12AX7A ECC83 Tube USA
Sylvania 12AX7A ECC83 Tube USA
$30.00
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Matching Pair The Fisher Telefunken ECC83 12AX7 Tube Ribbed Ladder Plates Tested
Matching Pair The Fisher Telefunken ECC83 12AX7 Tube Ribbed Ladder Plates Tested
$67.00 (11 Bids)
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2pcs Ceramic 9pin Tube Socket PCB Gold Plate For 6DJ8 12AX7 ECC83 Guitar Amp
2pcs Ceramic 9pin Tube Socket PCB Gold Plate For 6DJ8 12AX7 ECC83 Guitar Amp
$5.00
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12AX7 AUDIO GUITAR AMP HAM RADIO TV tube GE BRAND set of 2
12AX7 AUDIO GUITAR AMP HAM RADIO TV tube GE BRAND set of 2
$7.95 (1 Bid)
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3Pcs 9PIN TUBE SOCKET SAVER FR 12AX7 12AU7 ECC82 ECC83 New TS 9
3Pcs 9PIN TUBE SOCKET SAVER FR 12AX7 12AU7 ECC82 ECC83 New TS 9
$4.99
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PAIR Long Black Plate Vintage US Made 12AX7 ECC83 Preamp Tubes Sylvania Made
PAIR Long Black Plate Vintage US Made 12AX7 ECC83 Preamp Tubes Sylvania Made
$39.99
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Pair of Matched NOS Smooth Plate Telefunken 12AX7 ECC83 w boxes
Pair of Matched NOS Smooth Plate Telefunken 12AX7 ECC83 w boxes
$200.00
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One Rare Early 12AX7 Tubes by RCA NIB
One Rare Early 12AX7 Tubes by RCA NIB
$140.00
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2pcs Ceramic 9pin Tube Socket PCB Ceramic For 12AX7 12AU7 Tube Amplifier Parts
2pcs Ceramic 9pin Tube Socket PCB Ceramic For 12AX7 12AU7 Tube Amplifier Parts
$5.00
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 STRONG PAIR OF VINTAGE RCA 12AX7 AMPLIFIER TUBE WITH ANGLED  GETTER
STRONG PAIR OF VINTAGE RCA 12AX7 AMPLIFIER TUBE WITH ANGLED GETTER
$34.65
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One Matched Pair 12AX7A Tubes by RCA NIB 122 118
One Matched Pair 12AX7A Tubes by RCA NIB 122 118
$120.00
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2 Tubes Telefunken ECC83 germany 12AX7 Audio Tubes ribbed plates plate 3
2 Tubes Telefunken ECC83 germany 12AX7 Audio Tubes ribbed plates plate 3
$49.00
Time Remaining: 4h 7m
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3 Tubes Telefunken ECC83 germany 12AX7 Audio Tubes ribbed plates plate 1
3 Tubes Telefunken ECC83 germany 12AX7 Audio Tubes ribbed plates plate 1
$70.00
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2 Tubes Telefunken ECC83 germany 12AX7 Audio Tubes ribbed plates plate 2
2 Tubes Telefunken ECC83 germany 12AX7 Audio Tubes ribbed plates plate 2
$49.00
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Shuguang Audio Vacuum Tube 12AX7BECC83 Valve Amp New
Shuguang Audio Vacuum Tube 12AX7BECC83 Valve Amp New
$9.99
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One Matched Pair 12AX7A Tubes by RCA NIB 105 105
One Matched Pair 12AX7A Tubes by RCA NIB 105 105
$110.00
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One Matched Pair 12AX7A Tubes by RCA NIB 115 115
One Matched Pair 12AX7A Tubes by RCA NIB 115 115
$110.00
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One Matched Pair 12AX7A Tubes by RCA NIB 120 128
One Matched Pair 12AX7A Tubes by RCA NIB 120 128
$115.00
Time Remaining: 4h 16m
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RCA 12AX7 ECC83 Tube Amp Amplifier Preamplifier Trio
RCA 12AX7 ECC83 Tube Amp Amplifier Preamplifier Trio
$34.95 (1 Bid)
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2 x Machine made Teflon tube socket 9Pin 12AX7 6922 6H3
2 x Machine made Teflon tube socket 9Pin 12AX7 6922 6H3
$20.02
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100pc 9pin ceramic Chassis mount tube socket for EL84 12AX7 ECC83 6N1 6N3 ECC82
100pc 9pin ceramic Chassis mount tube socket for EL84 12AX7 ECC83 6N1 6N3 ECC82
$75.90
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4 Various Label Mullard 12AX7 ECC83 Tube Amp Amplifier Preamplifier
4 Various Label Mullard 12AX7 ECC83 Tube Amp Amplifier Preamplifier
$89.95
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One Matched Pair 12AX7A Tubes by RCA NIB 126 130
One Matched Pair 12AX7A Tubes by RCA NIB 126 130
$115.00
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JAN SYLVANIA 12AX7WA one tube
JAN SYLVANIA 12AX7WA one tube
$28.00
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1 1961 Raytheon 12AX7s gray plates 0 getter
1 1961 Raytheon 12AX7s gray plates 0 getter
$18.00
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AMP Wangs 100 Watt Guitar Amp Head all tube 12AX7 EL34 all new for 2018
AMP Wangs 100 Watt Guitar Amp Head all tube 12AX7 EL34 all new for 2018
$299.99
Time Remaining: 4h 56m
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1 1957 raytheon 12AX7s gray plates dimple slant  getter
1 1957 raytheon 12AX7s gray plates dimple slant getter
$34.00
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VINTAGE PILOT PT 1030B MONO TUBE AMP 6BQ5 EL84 12ax7
VINTAGE PILOT PT 1030B MONO TUBE AMP 6BQ5 EL84 12ax7
$135.00
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2PCS Ceramics B9A 9Pin Vacuun Tube Sockets HIFI DIT Tube Amp For 12AX7 EL84 6922
2PCS Ceramics B9A 9Pin Vacuun Tube Sockets HIFI DIT Tube Amp For 12AX7 EL84 6922
$5.35
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Vintage Fisher Amperex 12ax7 Ecc83 Vacuum Tube Holland
Vintage Fisher Amperex 12ax7 Ecc83 Vacuum Tube Holland
$41.99
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Very Strong Matched QuadHH Scott Raytheon 12ax7 Ecc83 Vacuum Tubes Black Plates
Very Strong Matched QuadHH Scott Raytheon 12ax7 Ecc83 Vacuum Tubes Black Plates
$213.99
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2 Ge 12ax7 Ecc83 Vacuum Tubes Short Plates Same Date Code
2 Ge 12ax7 Ecc83 Vacuum Tubes Short Plates Same Date Code
$56.99
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Vintage Balanced Pair Rca AMC 12ax7 Ecc83 Vacuum Tubes
Vintage Balanced Pair Rca AMC 12ax7 Ecc83 Vacuum Tubes
$48.99
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Ceramic Gold plated B9A 9Pin Tube Socket DIY Audio Tube AMP For 6DJ8 12AX7 2PCS
Ceramic Gold plated B9A 9Pin Tube Socket DIY Audio Tube AMP For 6DJ8 12AX7 2PCS
$6.06
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Grundig Telefunken 12AX7 EL84 6BQ5 Tube Stereo Amplifier NF 2 20
Grundig Telefunken 12AX7 EL84 6BQ5 Tube Stereo Amplifier NF 2 20
$1,199.00
Time Remaining: 5h 23m
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Matched Pair Fullmusic 12AX7 ECC83 Vacuum Tubes Brand New
Matched Pair Fullmusic 12AX7 ECC83 Vacuum Tubes Brand New
$69.00
Time Remaining: 5h 27m
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1pc Shuguang 12AX7B ECC83 Balance vacuum tube tested by AT1000
1pc Shuguang 12AX7B ECC83 Balance vacuum tube tested by AT1000
$13.00
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2Gold Plated 9Pin Tube Socket B9A PCB Mount For EL84 6922 5670 6DL4 EF86 12AX7
2Gold Plated 9Pin Tube Socket B9A PCB Mount For EL84 6922 5670 6DL4 EF86 12AX7
$4.72
Time Remaining: 5h 31m
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1pc Gold plated 12AU7 ECC82 12AX7 TO 6SN7 6SL7 B65 tube converter adapter
1pc Gold plated 12AU7 ECC82 12AX7 TO 6SN7 6SL7 B65 tube converter adapter
$9.90
Time Remaining: 5h 36m
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2 Groove tube 12AX7
2 Groove tube 12AX7
$28.99
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8pcs Skirted 9Pin Tube Shield Socket 12AX7 6DJ8 ECC88 12AU7 ECC83 Chassis B9A
8pcs Skirted 9Pin Tube Shield Socket 12AX7 6DJ8 ECC88 12AU7 ECC83 Chassis B9A
$9.67
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Vintage Fen Tone Phone Pre Amp PTP 12AX7
Vintage Fen Tone Phone Pre Amp PTP 12AX7
$39.95
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8pc 9PIN PCB ceramics VACCUM TUBE SOCKET SAVER FOR 12AU7 12AX7B ECC83 6D58 radio
8pc 9PIN PCB ceramics VACCUM TUBE SOCKET SAVER FOR 12AU7 12AX7B ECC83 6D58 radio
$9.33
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LOT OF 8 VINTAGE MIB RADIO TUBES SYLVANIA 5Y3GT 6V6GTA 12AX7A
LOT OF 8 VINTAGE MIB RADIO TUBES SYLVANIA 5Y3GT 6V6GTA 12AX7A
$62.00 (12 Bids)
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2 Pieces Rhodium Plated Tube Protector for 12AX7 ECC83
2 Pieces Rhodium Plated Tube Protector for 12AX7 ECC83
$12.00
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Vintage vacuum tube 12ax7a
Vintage vacuum tube 12ax7a
$25.00
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Dean Markley Overlord Classic Tube Overdrive 12AX7 Vintage Guitar Effect Pedal
Dean Markley Overlord Classic Tube Overdrive 12AX7 Vintage Guitar Effect Pedal
$149.00
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2pcs Shuguang 12AX7BECC83 Audio Vacuum Tubes Tested by Factory
2pcs Shuguang 12AX7BECC83 Audio Vacuum Tubes Tested by Factory
$19.50
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4pcs Shuguang 12AX7BECC83 Vacuum Tube For Amplifier Tested by Factory
4pcs Shuguang 12AX7BECC83 Vacuum Tube For Amplifier Tested by Factory
$39.99
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10pcs 9pin Green Tube Shield Socket For 6DJ8 12AX7 ECC83 12AU7 ECC82 6922 Valve
10pcs 9pin Green Tube Shield Socket For 6DJ8 12AX7 ECC83 12AU7 ECC82 6922 Valve
$9.75
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10pcs 9Pin Ceramic Vacuum Tube Socket Top Mount Valve For 12AX7 12AU7 ECC82
10pcs 9Pin Ceramic Vacuum Tube Socket Top Mount Valve For 12AX7 12AU7 ECC82
$23.74
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10pcs 9Pin Ceramic Vacuum Tube Socket Gold Valve Base for 12AX7 12AU7 12AT7
10pcs 9Pin Ceramic Vacuum Tube Socket Gold Valve Base for 12AX7 12AU7 12AT7
$23.74
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1 PCS Beijing 6N4 J Vacuum Tube 6N4J Instead of 12AX7 ECC83 Tubes NOS
1 PCS Beijing 6N4 J Vacuum Tube 6N4J Instead of 12AX7 ECC83 Tubes NOS
$12.99
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Amperex Mullard 12AX7 ECC83 Vacuum Tube I63 1510 1240 mhos 18 11 mA
Amperex Mullard 12AX7 ECC83 Vacuum Tube I63 1510 1240 mhos 18 11 mA
$43.99
Time Remaining: 7h 49m
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2 Vintage RCA 12AX7A ECC83 Vacuum Tubes Results 1070 1040 8 8 mA 1125 1190
2 Vintage RCA 12AX7A ECC83 Vacuum Tubes Results 1070 1040 8 8 mA 1125 1190
$43.99
Time Remaining: 7h 49m
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2 GE 12AX7 ECC83 Long Plates Audio Tubes 1340 1250 1220 1320 mhos 95 85 85
2 GE 12AX7 ECC83 Long Plates Audio Tubes 1340 1250 1220 1320 mhos 95 85 85
$68.99
Time Remaining: 7h 49m
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2 Pilot Radio Amperex 12AX7 ECC83 Audio Tubes   1K2 1500 1410 1150 1300
2 Pilot Radio Amperex 12AX7 ECC83 Audio Tubes 1K2 1500 1410 1150 1300
$83.99
Time Remaining: 7h 49m
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Great Pair RAYTHEON 12AX7 ECC83 Preamp Vacuum Tubes NOS NIB USA ARBL
Great Pair RAYTHEON 12AX7 ECC83 Preamp Vacuum Tubes NOS NIB USA ARBL
$61.99
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RCA Emerson 12AX7 ECC83 Vacuum Tube 1954 Results 1150 1000
RCA Emerson 12AX7 ECC83 Vacuum Tube 1954 Results 1150 1000
$39.99
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Pair Harman Kardon Amperex Holland 12AX7 ECC83 Vacuum Tubes Strong
Pair Harman Kardon Amperex Holland 12AX7 ECC83 Vacuum Tubes Strong
$78.99
Time Remaining: 8h 22m
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Realistic Gold Pin Japan 12AX7 ECC83 Vacuum Tube 1000 1160 mhos 8 95 mA
Realistic Gold Pin Japan 12AX7 ECC83 Vacuum Tube 1000 1160 mhos 8 95 mA
$21.99
Time Remaining: 8h 22m
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RCA 12AX7 ECC83 Black Plate Vacuum Tube 1245 1100 mhos
RCA 12AX7 ECC83 Black Plate Vacuum Tube 1245 1100 mhos
$43.99
Time Remaining: 8h 22m
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Vintage Baldwin Power Transformer C512 025950  5U4 6BQ5 12AX7
Vintage Baldwin Power Transformer C512 025950 5U4 6BQ5 12AX7
$37.99
Time Remaining: 8h 48m
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12AX7WC 12AX7 ECC83 SOVTEK NEW DOUBLE TRIODE LOW NOISE TESTED LOT OF 1 NEW TUBE
12AX7WC 12AX7 ECC83 SOVTEK NEW DOUBLE TRIODE LOW NOISE TESTED LOT OF 1 NEW TUBE
$8.90
Time Remaining: 9h 11m
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EXTREMELY RARE 12AX7 ECC83 NOS NIB TUBE never used free shipping read descript
EXTREMELY RARE 12AX7 ECC83 NOS NIB TUBE never used free shipping read descript
$38.99
Time Remaining: 9h 12m
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1pc Shuguang Natural Sound 12AX7 T ECC83 Warranty 12 Months
1pc Shuguang Natural Sound 12AX7 T ECC83 Warranty 12 Months
$40.00
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2 pieces NEW Shuguang 12AX7B 12AX7 B Vacuum Tube for Amplifier
2 pieces NEW Shuguang 12AX7B 12AX7 B Vacuum Tube for Amplifier
$25.64
Time Remaining: 9h 33m
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2pcs Silver 9pin Ventilated Plate Tube Socket Shock Proof Adapter 12AX7 EL84 Amp
2pcs Silver 9pin Ventilated Plate Tube Socket Shock Proof Adapter 12AX7 EL84 Amp
$7.91
Time Remaining: 9h 34m
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Lot10 Golden Aluminum Decorative Base Ring FR Vintage 6N112AX76922 Tube amp
Lot10 Golden Aluminum Decorative Base Ring FR Vintage 6N112AX76922 Tube amp
$38.50
Time Remaining: 9h 38m
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YAQIN MS 12B MM High End 12AX7 Vacuum Tube Pre Amplifier RIAA for turntable CA
YAQIN MS 12B MM High End 12AX7 Vacuum Tube Pre Amplifier RIAA for turntable CA
$423.81
Time Remaining: 10h 7m
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NOS FULL CASE 200 PIECES 5755 420A RAYTHEON DUAL TRIODE TUBES  12AX7 ECC83 7025
NOS FULL CASE 200 PIECES 5755 420A RAYTHEON DUAL TRIODE TUBES 12AX7 ECC83 7025
$971.25
Time Remaining: 10h 13m
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DIY kit 12AX7+12AU7+6Z4 vacuum tube preamplifier kit tube AMP
DIY kit 12AX7+12AU7+6Z4 vacuum tube preamplifier kit tube AMP
$128.00
Time Remaining: 10h 27m
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6N2 12AX7 Vacuum Tube Balanced Microphone Preamplifier HiFi XLR KTV MIC Pre Amp
6N2 12AX7 Vacuum Tube Balanced Microphone Preamplifier HiFi XLR KTV MIC Pre Amp
$129.99
Time Remaining: 11h 3m
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6B9A Skirted Base 9pin Ceramic Tube Socket ECC81 2 3 6DJ8 EF86 12AX7 EL84 12AU7
6B9A Skirted Base 9pin Ceramic Tube Socket ECC81 2 3 6DJ8 EF86 12AX7 EL84 12AU7
$6.68
Time Remaining: 11h 31m
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Shuguang Tube Kit For Dr Z Amps MINI Z12AX7 EL84
Shuguang Tube Kit For Dr Z Amps MINI Z12AX7 EL84
$24.20
Time Remaining: 11h 32m
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