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".




AV2 GE VACUUM TUBE 12AX7 in original factory box Free US Shipping
AV2 GE VACUUM TUBE 12AX7 in original factory box Free US Shipping
$23.80
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Fender 12AX7 ECC81 12AT7 Preamp Vacuum Amplifier Tubes Set of 5
Fender 12AX7 ECC81 12AT7 Preamp Vacuum Amplifier Tubes Set of 5
$40.25
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1x JJ Tesla 12AX7 ECC83S Gold Pin Vacuum Tube High Gain
1x JJ Tesla 12AX7 ECC83S Gold Pin Vacuum Tube High Gain
$23.50
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2x NEW JJ Tesla 12AX7 ECC83 ECC83S Gold Pin Vacuum Tube Matched Pair TESTED
2x NEW JJ Tesla 12AX7 ECC83 ECC83S Gold Pin Vacuum Tube Matched Pair TESTED
$46.00
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One 12AX7 Sylvania Baldwin Certified Reference Plus Grade Superb Audio Tube
One 12AX7 Sylvania Baldwin Certified Reference Plus Grade Superb Audio Tube
$28.75
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New Warm Audio EQP WA Program Equalizer Pultec Style Tube EQ 12AX7 Rack Unit
New Warm Audio EQP WA Program Equalizer Pultec Style Tube EQ 12AX7 Rack Unit
$699.00
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Matched Pair of Raytheon 12DT7 12AX7 sub NOS NIB Black Plate Vacuum Tubes
Matched Pair of Raytheon 12DT7 12AX7 sub NOS NIB Black Plate Vacuum Tubes
$300.00
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4 New Unused Ceramic 9 pin Socket f Old Ham Radio Tube 12AX7 Guitar Audio Amp
4 New Unused Ceramic 9 pin Socket f Old Ham Radio Tube 12AX7 Guitar Audio Amp
$9.50 (8 Bids)
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New Unused NS Ceramic 9 pin Socket f Old Ham Radio Tube 12AX7 Guitar Audio Amp
New Unused NS Ceramic 9 pin Socket f Old Ham Radio Tube 12AX7 Guitar Audio Amp
$0.99 (1 Bid)
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Sovtek 12AX7WC Preamp Tube
Sovtek 12AX7WC Preamp Tube
$20.99
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1 x Hewlett Packard 12AX7A ECC83 tubes 14mm ribbed plate RCA 1965
1 x Hewlett Packard 12AX7A ECC83 tubes 14mm ribbed plate RCA 1965
$15.00
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Vintage Woodward Schumacher Power Transformer 7591 12Ax7
Vintage Woodward Schumacher Power Transformer 7591 12Ax7
$45.00
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8pc 9pin Ceramic vacuum tube socket valve 55mm Shield 12AX7 12AU7 ECC83 ECC82
8pc 9pin Ceramic vacuum tube socket valve 55mm Shield 12AX7 12AU7 ECC83 ECC82
$15.39
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12AX7 QTY 1 Vacuum Tube Electron Tubes Mfg by Telefunken NOS
12AX7 QTY 1 Vacuum Tube Electron Tubes Mfg by Telefunken NOS
$12.50 (3 Bids)
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Perfectly balanced Ultron ECC83 12AX7 tube excellent condition made in France
Perfectly balanced Ultron ECC83 12AX7 tube excellent condition made in France
$39.00
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Peavey 00053150 Super 7 12AX7 Preamp Tube One per package
Peavey 00053150 Super 7 12AX7 Preamp Tube One per package
$17.99
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12AX7A Qty 1 Vacuum Tube Electron Tubes Mfg RCA NOS
12AX7A Qty 1 Vacuum Tube Electron Tubes Mfg RCA NOS
$17.00 (4 Bids)
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Matched Pair GE 12AX7 Long Plate D Getter Very Strong
Matched Pair GE 12AX7 Long Plate D Getter Very Strong
$58.99
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8pc 9Pin Vacuum tube Socket with 55mm Aluminum Chassis for 12AX7 12AU7 ECC82
8pc 9Pin Vacuum tube Socket with 55mm Aluminum Chassis for 12AX7 12AU7 ECC82
$15.39
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27 Vacuum Tubes Bugle Boy RCA Telefunken EL34  12au7  12ax7
27 Vacuum Tubes Bugle Boy RCA Telefunken EL34 12au7 12ax7
$427.00 (17 Bids)
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Realistic Made in Japan 12AX7A Gold Pin Vacuum Tube Amplitrex Tested Strong
Realistic Made in Japan 12AX7A Gold Pin Vacuum Tube Amplitrex Tested Strong
$15.00
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8x 6N2P 12AX7 ECC83 Russian tube NOS
8x 6N2P 12AX7 ECC83 Russian tube NOS
$10.46
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9pcs NOS  used RFT Tungsram Ei ECC8312AX7 1970s Vacuum Dual Triode Audio Tubes
9pcs NOS used RFT Tungsram Ei ECC8312AX7 1970s Vacuum Dual Triode Audio Tubes
$135.00
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7 GE 5751 SYLVANIA TESTED 12AX7 TUBES
7 GE 5751 SYLVANIA TESTED 12AX7 TUBES
$13.00 (6 Bids)
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6V6GT 12AX7 TUBE GUITAR AMP PROJECT VOICE OF MUSIC
6V6GT 12AX7 TUBE GUITAR AMP PROJECT VOICE OF MUSIC
$14.50 (3 Bids)
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2 AMPEREX HOLLAND MULLARD ECC83 12AX7 TUBES BUGLE BOY ORANGE GLOBE
2 AMPEREX HOLLAND MULLARD ECC83 12AX7 TUBES BUGLE BOY ORANGE GLOBE
$79.00 (6 Bids)
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3 Fisher Telefunken 12ax7 ECC83 Vacuum Tubes  Ripped Long Plates
3 Fisher Telefunken 12ax7 ECC83 Vacuum Tubes Ripped Long Plates
$179.99
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11pc TEST ADAPTERS NUVISTOR OCTAL 9 12 PIN COMPACTRON 6 7 PIN 12ax7 6550 6JE6 ++
11pc TEST ADAPTERS NUVISTOR OCTAL 9 12 PIN COMPACTRON 6 7 PIN 12ax7 6550 6JE6 ++
$9.99
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PAIR DYNACO Telefunken 12AX7 ECC83 West Germany Vacuum Tubes HICKOK 539C TESTED
PAIR DYNACO Telefunken 12AX7 ECC83 West Germany Vacuum Tubes HICKOK 539C TESTED
$74.99
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12AX7A Dynavox tested strong
12AX7A Dynavox tested strong
$3.95 (1 Bid)
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NEW SIB Pedals CUDA Overdrive Pedal Real 12AX7 Pure Class A Distortion
NEW SIB Pedals CUDA Overdrive Pedal Real 12AX7 Pure Class A Distortion
$259.00
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Sears Silvertone Medalist Amplifier Dyi Stereo 12ax7 class A Single Ended
Sears Silvertone Medalist Amplifier Dyi Stereo 12ax7 class A Single Ended
$125.00
Time Remaining: 4h 7m
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Tung Sol 12AX7 Black Plate Vac Tube from 1949 50 Perfect Balance
Tung Sol 12AX7 Black Plate Vac Tube from 1949 50 Perfect Balance
$75.00
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4pcs 6n2p ev to 12ax7 ecc83 tube adapter socket convertersocket + tube deal
4pcs 6n2p ev to 12ax7 ecc83 tube adapter socket convertersocket + tube deal
$44.99
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Grundig NF1 Germany ELL80 12AX7 STEREO power amplifier 85 w p chnice sound
Grundig NF1 Germany ELL80 12AX7 STEREO power amplifier 85 w p chnice sound
$99.00 (3 Bids)
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6 Fisher Telefunken 12ax7 ECC83 Vacuum Tubes  Smooth Long Plates
6 Fisher Telefunken 12ax7 ECC83 Vacuum Tubes Smooth Long Plates
$349.99
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Pair of Triad A 9J input transformers MIC Moving coil SUT 12AX7 6DJ8 tube amp
Pair of Triad A 9J input transformers MIC Moving coil SUT 12AX7 6DJ8 tube amp
$269.64
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Vintage Electro Kits Tube Stereo or Mono Amplifier Model SP206 12ax7 35c5 amp
Vintage Electro Kits Tube Stereo or Mono Amplifier Model SP206 12ax7 35c5 amp
$113.01 (5 Bids)
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Marshall ECC83 12AX7 Preamp Amplifier Tubes Valves set of 4
Marshall ECC83 12AX7 Preamp Amplifier Tubes Valves set of 4
$61.25
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PreSonusTubePre Microphone Preamp V1 with 12AX7 TubePower Supply Included
PreSonusTubePre Microphone Preamp V1 with 12AX7 TubePower Supply Included
$39.00
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Test Good Tung Sol 12AX7 Old Ham Radio Tube Receiver Fender Guitar Audio Amp
Test Good Tung Sol 12AX7 Old Ham Radio Tube Receiver Fender Guitar Audio Amp
$3.00 (3 Bids)
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Rare EICO branded AMPEREX HOLLAND 12AX7 PAIR SAME CODE
Rare EICO branded AMPEREX HOLLAND 12AX7 PAIR SAME CODE
$88.00
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Tested Good GE JAN JG 5751 WA 12AX7 Old Ham Radio Tube Fender Guitar Audio Amp
Tested Good GE JAN JG 5751 WA 12AX7 Old Ham Radio Tube Fender Guitar Audio Amp
$6.50 (6 Bids)
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1 x BEL Mullard ECC83 12AX7 Tested V STRONG Balanced Vacuum Dual Triode Tube
1 x BEL Mullard ECC83 12AX7 Tested V STRONG Balanced Vacuum Dual Triode Tube
$34.20
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1 x BEL Mullard ECC83 12AX7 Tested V STRONG Balanced Vacuum Twin Triode Tube
1 x BEL Mullard ECC83 12AX7 Tested V STRONG Balanced Vacuum Twin Triode Tube
$32.31
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Pair Fisher Mullard 12ax7 ECC83 Vacuum Tubes  Ripped Plates I63
Pair Fisher Mullard 12ax7 ECC83 Vacuum Tubes Ripped Plates I63
$79.99
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1 x BEL Mullard ECC83 12AX7 Tested V STRONG Balanced Vacuum Dual Triode Tube
1 x BEL Mullard ECC83 12AX7 Tested V STRONG Balanced Vacuum Dual Triode Tube
$32.30
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1 x BEL Mullard ECC83 12AX7 Tested V STRONG Balanced Vacuum Dual Triode Tube
1 x BEL Mullard ECC83 12AX7 Tested V STRONG Balanced Vacuum Dual Triode Tube
$33.25
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1 x BEL Mullard ECC83 12AX7 Tested V STRONG Balanced Vacuum Dual Triode Tube
1 x BEL Mullard ECC83 12AX7 Tested V STRONG Balanced Vacuum Dual Triode Tube
$34.18
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1 x BEL Mullard ECC83 12AX7 Tested V STRONG Balanced Vacuum Dual Triode Tube
1 x BEL Mullard ECC83 12AX7 Tested V STRONG Balanced Vacuum Dual Triode Tube
$30.40
Time Remaining: 4h 52m
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1 x BEL Mullard ECC83 12AX7 Tested V STRONG Balanced Vacuum Dual Triode Tube
1 x BEL Mullard ECC83 12AX7 Tested V STRONG Balanced Vacuum Dual Triode Tube
$36.10
Time Remaining: 4h 53m
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Sylvania 5751 12AX7 Vacuum Tubes NOS NIB Amplitrex Tested 3 Mica Balanced
Sylvania 5751 12AX7 Vacuum Tubes NOS NIB Amplitrex Tested 3 Mica Balanced
$89.99
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Vintage Sylvania 12AX7 Tube USA 1960s Long Plate Halo Getter Tests Super Strong
Vintage Sylvania 12AX7 Tube USA 1960s Long Plate Halo Getter Tests Super Strong
$24.99
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NIB USA Philips JAN 12AX7WA tubes 2000 each in lots of four
NIB USA Philips JAN 12AX7WA tubes 2000 each in lots of four
$80.00
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Hammond by Amperex 12AX7 ECC83 Holland Amp Preamp Tube
Hammond by Amperex 12AX7 ECC83 Holland Amp Preamp Tube
$5.50 (4 Bids)
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Orange Micro Terror Guitar Head 20WGuitar Amp 12AX7 tube preamp 4 ohm output
Orange Micro Terror Guitar Head 20WGuitar Amp 12AX7 tube preamp 4 ohm output
$125.00
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Mullard 12AX7 Cryo Treated Matched Pair 2
Mullard 12AX7 Cryo Treated Matched Pair 2
$46.49
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Mullard 12AX7 Cryo Treated Single 1
Mullard 12AX7 Cryo Treated Single 1
$21.38
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12AX7 12AX7B  ECC83  12AX7A a pair of Shuguang Vacuum tubes
12AX7 12AX7B ECC83 12AX7A a pair of Shuguang Vacuum tubes
$17.00
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4 12AX7 Sylvania Baldwin Audiophile+ Grade Premium Quality Vintage Vacuum Tubes
4 12AX7 Sylvania Baldwin Audiophile+ Grade Premium Quality Vintage Vacuum Tubes
$120.00
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2pcs pair 6N2P EV 12AX7 ECC83 Voskhod Rockets NOS 70th
2pcs pair 6N2P EV 12AX7 ECC83 Voskhod Rockets NOS 70th
$7.99
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Vintage used 12AX7WA USA Tubes Philips Sylvania marked 7025 8252 AFS one square
Vintage used 12AX7WA USA Tubes Philips Sylvania marked 7025 8252 AFS one square
$44.99
Time Remaining: 6h 31m
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Vintage Woodward Schumacher P 6417 from 7591 12AX7 Tube Amplifier
Vintage Woodward Schumacher P 6417 from 7591 12AX7 Tube Amplifier
$25.00
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MARCONI ECC83 ITALY 12AX7 TIGHT MATCH PAIR CHROME PLATE EXTREMELY RARE MINTY
MARCONI ECC83 ITALY 12AX7 TIGHT MATCH PAIR CHROME PLATE EXTREMELY RARE MINTY
$189.95
Time Remaining: 6h 50m
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9Pin Bakelite Vacuum Tube Socket Saver base For 12AX7 12AU7 ECC82 ECC83 ampsGX
9Pin Bakelite Vacuum Tube Socket Saver base For 12AX7 12AU7 ECC82 ECC83 ampsGX
$4.23
Time Remaining: 6h 57m
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9Pin Bakelite Vacuum Tube Socket Saver base For 12AX7 12AU7 ECC82 ECC83 amps DN
9Pin Bakelite Vacuum Tube Socket Saver base For 12AX7 12AU7 ECC82 ECC83 amps DN
$4.49
Time Remaining: 6h 58m
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Vintage Ampro Amprosound Projector 6V6 12AX7 5879 Tube Amplifier
Vintage Ampro Amprosound Projector 6V6 12AX7 5879 Tube Amplifier
$70.00
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9Pin Bakelite Vacuum Tube Socket Saver base For 12AX7 12AU7 ECC82 ECC83 ampsFJ
9Pin Bakelite Vacuum Tube Socket Saver base For 12AX7 12AU7 ECC82 ECC83 ampsFJ
$4.70
Time Remaining: 7h 8m
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RCA WEBSTER 12AX7 ECC82 5751 NOS Vacuum Tube RADIO GUARANTEED amp guitar NR
RCA WEBSTER 12AX7 ECC82 5751 NOS Vacuum Tube RADIO GUARANTEED amp guitar NR
$20.00
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9Pin Bakelite Vacuum Tube Socket Saver base For 12AX7 12AU7 ECC82 ECC83 am BLJC
9Pin Bakelite Vacuum Tube Socket Saver base For 12AX7 12AU7 ECC82 ECC83 am BLJC
$4.71
Time Remaining: 7h 13m
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TRUTONE MXR388 Stereo Receiver Am Fm Tube Amplifier Vintage ECL86 12ax7
TRUTONE MXR388 Stereo Receiver Am Fm Tube Amplifier Vintage ECL86 12ax7
$51.00 (22 Bids)
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A Pair of ECC83 12AX7 Tubes By Philips For Mullard  Hallicrafters
A Pair of ECC83 12AX7 Tubes By Philips For Mullard Hallicrafters
$98.00
Time Remaining: 7h 27m
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RCA SCP 2 RS 176 TCT 2 TAPE RECORDER Vintage tube audio12AX7 6V6GT 6CG7
RCA SCP 2 RS 176 TCT 2 TAPE RECORDER Vintage tube audio12AX7 6V6GT 6CG7
$150.00
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8 RINGS SILICONE TUBES ECC88 ECC83 12AX7 12AU7 12AT7 12BH7 PREAMPLI GUITAR
8 RINGS SILICONE TUBES ECC88 ECC83 12AX7 12AU7 12AT7 12BH7 PREAMPLI GUITAR
$13.70
Time Remaining: 7h 50m
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One Closely Matched Pair of 12AX7 ECC83 Tubes Fisher by Philips of Holland
One Closely Matched Pair of 12AX7 ECC83 Tubes Fisher by Philips of Holland
$96.00
Time Remaining: 7h 51m
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One Closely Matched Pair of Mullard 12AX7 ECC83 Tubes Fisher Brand Hi Ratings
One Closely Matched Pair of Mullard 12AX7 ECC83 Tubes Fisher Brand Hi Ratings
$104.00
Time Remaining: 7h 55m
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4pc 9pin ceramic tube sockets with spring Scaffolding 12AX7 12AU7 audio amp DIY
4pc 9pin ceramic tube sockets with spring Scaffolding 12AX7 12AU7 audio amp DIY
$9.01
Time Remaining: 7h 56m
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Closely Matched Pair of 12AX7 ECC83 Tubes Mullard Made for Fisher Hi Ratings
Closely Matched Pair of 12AX7 ECC83 Tubes Mullard Made for Fisher Hi Ratings
$104.00
Time Remaining: 7h 59m
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Ampex F 44 Fine Line F 4470 Reel To Reel Tape Deck Vacuum Tube 12AX7
Ampex F 44 Fine Line F 4470 Reel To Reel Tape Deck Vacuum Tube 12AX7
$74.95 (1 Bid)
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Vintage RCA 12AX7 1960s Long Grey Plate Halo Getter Tube tested Good
Vintage RCA 12AX7 1960s Long Grey Plate Halo Getter Tube tested Good
$24.99
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Asian made 12ax7a w Marshall logo 100 100 High Test
Asian made 12ax7a w Marshall logo 100 100 High Test
$19.99
Time Remaining: 8h 1m
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Phillips Mullard 12ax7 Grey O Getter Tests strong 100 105
Phillips Mullard 12ax7 Grey O Getter Tests strong 100 105
$54.99
Time Remaining: 8h 3m
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GE 12ax7 Grey Plate O Getter Test Strong
GE 12ax7 Grey Plate O Getter Test Strong
$19.99
Time Remaining: 8h 3m
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GE 12ax7a Ceramic Bottom Grey Plate O Getter Test Strong
GE 12ax7a Ceramic Bottom Grey Plate O Getter Test Strong
$19.99
Time Remaining: 8h 3m
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Telefunken 12ax7 faded silk screen Tests strong100 100
Telefunken 12ax7 faded silk screen Tests strong100 100
$54.99
Time Remaining: 8h 3m
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GE 12ax7a Grey Plate O Getter Test Strong 100 100
GE 12ax7a Grey Plate O Getter Test Strong 100 100
$24.99
Time Remaining: 8h 3m
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Tungsol 12ax7a Grey Plate O Getter Test Strong
Tungsol 12ax7a Grey Plate O Getter Test Strong
$19.99
Time Remaining: 8h 3m
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2PCS Vintage Tube 9Pin Saver Sockets for 12AX7 12AU7
2PCS Vintage Tube 9Pin Saver Sockets for 12AX7 12AU7
$2.91
Time Remaining: 8h 6m
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One Closely Matched Pair of 12AX7 ECC83 Tubes Fisher by Mullard Hi Ratings
One Closely Matched Pair of 12AX7 ECC83 Tubes Fisher by Mullard Hi Ratings
$102.00
Time Remaining: 8h 7m
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Telefunken Vintage  12AX7 Preamp Tube Pair strong and well matched
Telefunken Vintage 12AX7 Preamp Tube Pair strong and well matched
$85.00
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Pair of Mullard ECC83 12AX7 Tubes
Pair of Mullard ECC83 12AX7 Tubes
$85.00
Time Remaining: 8h 12m
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Vintage GE 12AX7 1962 Long Grey Plate Halo Getter Tube tested Good Balanced
Vintage GE 12AX7 1962 Long Grey Plate Halo Getter Tube tested Good Balanced
$19.99
Time Remaining: 8h 14m
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Pair of Mullard ECC83 12AX7 Tubes One Branded Fisher High Ratings
Pair of Mullard ECC83 12AX7 Tubes One Branded Fisher High Ratings
$105.00
Time Remaining: 8h 15m
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SIEMENS ECC83 12AX7 VALVE TUBE NEW OLD STOCK NEW IN BOX MADE IN WEST GE
SIEMENS ECC83 12AX7 VALVE TUBE NEW OLD STOCK NEW IN BOX MADE IN WEST GE
$37.73
Time Remaining: 8h 17m

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One Closely Matched Pair of 12AX7 ECC83 Tubes Fisher by Mullard 95 100
One Closely Matched Pair of 12AX7 ECC83 Tubes Fisher by Mullard 95 100
$95.00
Time Remaining: 8h 22m
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CED ST9 900 VACUUM TUBE 9 PIN MINIATURE SOCKET SAVER for 12AX7 12AU7 12BY7
CED ST9 900 VACUUM TUBE 9 PIN MINIATURE SOCKET SAVER for 12AX7 12AU7 12BY7
$10.95
Time Remaining: 8h 26m
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Vintage RCA 12AX7 Vacuum Radio Amp Tube With Box NOS boxed
Vintage RCA 12AX7 Vacuum Radio Amp Tube With Box NOS boxed
$10.50 (2 Bids)
Time Remaining: 8h 27m

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One Closely Matched Pair of 12AX7 ECC83 Tubes Fisher by Philips 95 110
One Closely Matched Pair of 12AX7 ECC83 Tubes Fisher by Philips 95 110
$92.00
Time Remaining: 8h 27m
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4pc 9pin PCB Ceramic vacuum tube socket valve 12AX7 12AU7 ECC83 Audio amp part
4pc 9pin PCB Ceramic vacuum tube socket valve 12AX7 12AU7 ECC83 Audio amp part
$7.72
Time Remaining: 8h 28m
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1pc Silver Tube Guard For 12AX7 12AU7 6N11 6922 5687 ECC82 Protector Tube Preamp
1pc Silver Tube Guard For 12AX7 12AU7 6N11 6922 5687 ECC82 Protector Tube Preamp
$5.99
Time Remaining: 8h 29m

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