12AT7

July 6, 2008 | Leave a Comment

The 12AT7 is a high-frequency twin triode in a small 9-pin miniature glass package. This tube has a mu factor of 60, as compared to the higher gain 12AX7 with a factor of 100, and the 12AU7, with a mu of only 20. As you can see, it shares similar pin connections with it's cousins, but these tubes are not interchangeable. The 12AT7 is found in many high fidelity applications, as each triode section in normal use operates as a class A amplifier. They also turn up in line and microphone preamplifiers, musical instrument amps, and vacuum tube equipped recording equipment. By their design, they are inherently low noise, making them a good choice for these applications.

 




12AT7 ECC81 Vacuum Tube GE USA 1967
12AT7 ECC81 Vacuum Tube GE USA 1967
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Sylvania 12AT7 ECC81 Black Plates Vacuum Tube Strong  Balanced
Sylvania 12AT7 ECC81 Black Plates Vacuum Tube Strong Balanced
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Fender 12AX7 ECC81 12AT7 Preamp Vacuum Amplifier Tubes Set of 5
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HIGH FIDELITY MATCHED PAIR RCA 6201 12AT7 WA Vtg Guitar Amp Vacuum Tube Part NIB
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1 LONG LIFE HIFI RCA 6201 12AT7WA 12AT7 Vtg Guitar Amp Vacuum Tube Part NOS NIB
1 LONG LIFE HIFI RCA 6201 12AT7WA 12AT7 Vtg Guitar Amp Vacuum Tube Part NOS NIB
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4 x ECC81 12AT7 tubes Siemens Valvo Telefunken Mullard D getter
4 x ECC81 12AT7 tubes Siemens Valvo Telefunken Mullard D getter
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4 x ECC81 12AT7 tubes made by Siemens  Halske
4 x ECC81 12AT7 tubes made by Siemens Halske
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LONG LIFE MATCHED PAIR 2 RCA 6201 12AT7 WA Vtg Guitar Amp Vacuum Tube NIB
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Perfectly balanced IEC Mullard 12AT7 ECC81 tube 3 hole copper grid rods
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NOS Matched Pair of GE 12AT7 ECC81 Oval Gray Plate Round Halo Getter
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Strong RCA Gray Plate Spiral Post O Getter 12AT7 ECC81 Tube
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Amperex 12AT7 NOS tested at 75 REDUCED MORE
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NOS Matched Pair RCA USA 12AT7 ECC81 Black Plate  Get Vacuum Tubes
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Matched Pair of GE 12AT7 ECC81 White Label Oval Gray Plate U Bar Halo Getter
Matched Pair of GE 12AT7 ECC81 White Label Oval Gray Plate U Bar Halo Getter
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NOS Matched Pair RCA US 12AT7 ECC81 Black Plate Top  Get Vacuum Tubes 100
NOS Matched Pair RCA US 12AT7 ECC81 Black Plate Top Get Vacuum Tubes 100
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Lot 4 NOS VTG Electronic Vacuum Tubes 12AT7 Tung Sol Sylvania Channel Master +
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Matched Pair Triple Mica 12AT7 Tubes
Matched Pair Triple Mica 12AT7 Tubes
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LOT OF 8 12AT7 OR 6679 vacuum TubeS Western Electric TESTED
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3 TELEFUNKEN 12AT7 ECC81 TUBES
3 TELEFUNKEN 12AT7 ECC81 TUBES
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Matched Pair Sylvania Black Plate 12AT7 ECC81 Tubes NOS
Matched Pair Sylvania Black Plate 12AT7 ECC81 Tubes NOS
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QTY 2 12AT7 LOW NOISE VACUUM TUBE NEW IN BOX
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8 GE 5 STAR 3 MICA 6201 12AT7WA TUBES TV 7D U TESTED
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Matched Pair General Electric GE 12AT7 Tubes NOS NIB 45 Degree Getters
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ONE GE 6679 OR 12AT7 Communication Vacuum Tube HICKOK 539C TESTED
ONE GE 6679 OR 12AT7 Communication Vacuum Tube HICKOK 539C TESTED
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1959 Matched Pair TELEFUNKEN 12AT7s Test New
1959 Matched Pair TELEFUNKEN 12AT7s Test New
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Siemens  Halske E81CC 1960s NOS NIB 3 MICA 12AT7 ECC81
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RCA 12AT7 ECC81 7435 Preamp Amplifier Tube Valve
RCA 12AT7 ECC81 7435 Preamp Amplifier Tube Valve
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Pair of NOS GE JAN 12AT7WC Vacuum Tubes
Pair of NOS GE JAN 12AT7WC Vacuum Tubes
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Strong RCA 12AT7 ECC81 Vacuum Tube 56004900
Strong RCA 12AT7 ECC81 Vacuum Tube 56004900
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Matched Pair Amperex Mullard 12AT7 ECC81 Vacuum Tubes VF3 Very Strong Balanced
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1 HIGH FIDELITY SYLVANIA 6201 12AT7 WA BLACK PLATE Vtg Amp Vacuum Tube NIB NOS
1 HIGH FIDELITY SYLVANIA 6201 12AT7 WA BLACK PLATE Vtg Amp Vacuum Tube NIB NOS
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2 x 12AT7 ECC 81 Tung Sol Twin Triodes
2 x 12AT7 ECC 81 Tung Sol Twin Triodes
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Rare GE Italy 12AT7 Vintage Tube Tests Exceptionally Strong Balanced
Rare GE Italy 12AT7 Vintage Tube Tests Exceptionally Strong Balanced
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4 x 12AT7 ECC 81 6201 Sylvania Triple Mica Twin Triodes 3 Test NOS
4 x 12AT7 ECC 81 6201 Sylvania Triple Mica Twin Triodes 3 Test NOS
$13.50 (2 Bids)
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Mullard ECC81 12AT7 Branded Heath Vintage Tube
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5 x 12AT7 ECC 81 RCA Twin Triodes 1 Tube NOS
5 x 12AT7 ECC 81 RCA Twin Triodes 1 Tube NOS
$8.99 (1 Bid)
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2 Mullard IEC 12AT7 ECC81 Vacuum Tubes B5D1 B5D3
2 Mullard IEC 12AT7 ECC81 Vacuum Tubes B5D1 B5D3
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2 BRIMAR 6060 CV4024 12AT7WA SQUARE 1956 TRIPLE BLACK AVO TEST NOS + NO RESERVE
2 BRIMAR 6060 CV4024 12AT7WA SQUARE 1956 TRIPLE BLACK AVO TEST NOS + NO RESERVE
$11.32 (6 Bids)
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A Lot of Four Assorted 12AT7 Tubes of US Brand All Tested Good
A Lot of Four Assorted 12AT7 Tubes of US Brand All Tested Good
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A Lot of Four Assorted 12AT7 Tubes of US Brand All Tested Good Ring Getter
A Lot of Four Assorted 12AT7 Tubes of US Brand All Tested Good Ring Getter
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ONE GE 12AT7 VACUUM TUBE TESTED STRONG
ONE GE 12AT7 VACUUM TUBE TESTED STRONG
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SYLVANIA 3223 5839 12AT7 Vintage Tube Tested Very Strong
SYLVANIA 3223 5839 12AT7 Vintage Tube Tested Very Strong
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Matched Pair Tung Sol 12AT7 ECC81 Vacuum Tubes Very Strong
Matched Pair Tung Sol 12AT7 ECC81 Vacuum Tubes Very Strong
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2 NOS NIB MULLARD CV455 ECC81 12AT7 Tk HOE GETTER MATCHED 1954 55 FULLY TESTED
2 NOS NIB MULLARD CV455 ECC81 12AT7 Tk HOE GETTER MATCHED 1954 55 FULLY TESTED
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SYLVANIA 3223 5839 12AT7 Vintage Tube Tested Strong
SYLVANIA 3223 5839 12AT7 Vintage Tube Tested Strong
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TUNG SOL USA 12AT7 BLACK PLATE HALO GETR PERFECT MATCH PAIR NOS+ NIB 1963
TUNG SOL USA 12AT7 BLACK PLATE HALO GETR PERFECT MATCH PAIR NOS+ NIB 1963
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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
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RCA 12AT7 ECC81 Vacuum Tube Very Strong  Balanced
RCA 12AT7 ECC81 Vacuum Tube Very Strong Balanced
$33.99
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Lot of 16 Old Radio Tubes 12AT7 6AN8 6BH6 12AU7A 6Bq7A6BC5 6J6 Lot A
Lot of 16 Old Radio Tubes 12AT7 6AN8 6BH6 12AU7A 6Bq7A6BC5 6J6 Lot A
$11.50 (7 Bids)
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GE 12aT7 Short Grey Plate O Getter 100 100
GE 12aT7 Short Grey Plate O Getter 100 100
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NOS 12AX7 Vintage Vacuum Tubes Guitar Preamp Radio TV 12AU7 12AT7 ECC83 NIB
NOS 12AX7 Vintage Vacuum Tubes Guitar Preamp Radio TV 12AU7 12AT7 ECC83 NIB
$56.00 (2 Bids)
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MAZDA 12AT7 ECC81 PAIR OF BLACK PLATE VINTAGE BRITISH TESTED BOXED VALVES TUBES
MAZDA 12AT7 ECC81 PAIR OF BLACK PLATE VINTAGE BRITISH TESTED BOXED VALVES TUBES
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12AT7 ECC81 Vacuum Tube GE USA 1959 TESTED FREE SHIPPING
12AT7 ECC81 Vacuum Tube GE USA 1959 TESTED FREE SHIPPING
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Sonotone 12AT7 ECC81 Vacuum Tube Results 4870 4380
Sonotone 12AT7 ECC81 Vacuum Tube Results 4870 4380
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Sylvania 12AT7 ECC81 3 MICA Vacuum Tube Very Strong  Balanced Results5820 5845
Sylvania 12AT7 ECC81 3 MICA Vacuum Tube Very Strong Balanced Results5820 5845
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RCA 12AT7 ECC81 Vacuum Tube Results 4200 4775
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Tube valve amplifier 6CA7 12AX7 12AT7 CINEMA FOR PARTS RESTORE WITHOUT TUBES
Tube valve amplifier 6CA7 12AX7 12AT7 CINEMA FOR PARTS RESTORE WITHOUT TUBES
$200.00
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9pin B9A Ceramic Tube Socket For ECC83 12AT7 EL84 6DJ8 5670 12AX7 6922 x3
9pin B9A Ceramic Tube Socket For ECC83 12AT7 EL84 6DJ8 5670 12AX7 6922 x3
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Gold plated 9pin B9A ceramic tube socket for ECC83 12AT7 6DJ8 5670 6922 12ax7 x5
Gold plated 9pin B9A ceramic tube socket for ECC83 12AT7 6DJ8 5670 6922 12ax7 x5
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4PC 9Pin B9A Ceramic Tube Socket For 12AX712AU712AT7ECC82ECC83EL845670
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10pcs 19mm Vacuum Tube Dampers Silicone O Ring Fit 12AX7 12AT7 EL84 6922 ECC88
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JJ Electronics T 12AT7 JJ Vacuum Tube ECC81 Electric Guitar Power Amplifier
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1 TELEFUNKEN 12AT7 ECC81 AUDIO PRE AMP DUAL TRIODE STRONG TESTED W TV 7D U
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TU1 EMP V2 6922+12AT7 Tube headphone amplifier DIY Kit Note no tubes
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4340mm Gold Vacuum Tube Guard Protector Cover Fr 12AU7 12AT7 12AX7 Audio Amp
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XiangSheng 728A Vacuum Tube Pre amplifier HIFI EXQUIS 12AT7 12AU7 6Z4 with Tone
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GE 6201 Tested Double Triode Tube Valve Rohre JG 12AT7 WA 12at7wa NOS NIB
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Vintage GE 12AT7 Vacuum tubeUSA Gray Plates HICKOK TESTED GOOD USED
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ECC81 CV455 12AT7WA 6201 MULLARD NOS BOXED MIL SPECJAN VALVE TUBE
ECC81 CV455 12AT7WA 6201 MULLARD NOS BOXED MIL SPECJAN VALVE TUBE
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2 x 12AT7 ECC81 TUBES USED VINTAGE tested TV 7D U
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10PCS PCB Mount 9Pin B9A Tube Socket For 12AX712AT7EL845670ECC836DJ8 6922
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Sylvania 12AT7 ECC81 Black Plates Vacuum Tube Resluts 4200 4400
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12AT7WC JAN Philips NOS USA tested selected low noise  microphonis 1 pc
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1 RARE 53 SYLVANIA 12AT7 WA 6201 BLACK PLATE Vtg Guitar Amp Vacuum Tube NIB NOS
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Gm MATCHED PAIR SYLVANIA 12AT7 WA 6201 BLACK PLATE Vtg Amp Vacuum Tube NIB NOS
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1 NIB 12AT7 ECC81 Tube Various Brands USA
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2 Sonotone Branded MULLARD 12AT7 RIBBED PLATE Vacuum Tube Lot ECC81
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Rare Mullard Mitcham 12AT7 ECC81 D Getter Tubes Matched Pair 1960 Made
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Tung Sol Tube Upgrade Kit For Kustom Double Cross Amps 6L6GCSTR 12AX7 12AT7
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1959 strong Matched Pair Of RCA 12AT7 ECC81 Black Plate D Getter Tubes
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2 Electro Harmonix vaccum tubes 12AT7 Matched Pair
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GEC A2900 12AT7 RARE NOS NIB Amplitrex Tested
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10PCS Bakelite 9Pin To 9Pin Tube Sockets PCB Mount For EL84 12AX7 12AU7 12AT7
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Telefunken ECC81 12AT7 NOS Vacuum Tubes 1 Pair TESTED SUPER STRONG MATCHED
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Tung Sol EH Tube Kit Fender Silverface Deluxe Reverb Amp 6V6GT 12AX7 12AT7 5U4GB
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Tung Sol Tube Kit Fender Princeton Reverb Reissue Amps 6V6GT 12AX7 12AT7 5AR4
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4 x ECC85 6AQ8 6L12 12AT7 NEW NOS BOXED RFT
4 x ECC85 6AQ8 6L12 12AT7 NEW NOS BOXED RFT
$37.95
Time Remaining: 23h 59m
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Tung Sol Tube Upgrade Kit For Fender Supersonic 22 Amps 6V6GT 12AX7 12AT7
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$134.00
Time Remaining: 1d 7m
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Tung Sol Tube Upgrade Kit For Egnater Rebel 20 Amps 6V6GT 12AX7 12AT7
Tung Sol Tube Upgrade Kit For Egnater Rebel 20 Amps 6V6GT 12AX7 12AT7
$132.00
Time Remaining: 1d 13m
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Strong RCA Gray Plate O Getter 12AT7 ECC81 Tube 10
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$13.49
Time Remaining: 1d 16m
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Strong RCA Gray Plate Angled O Getter 12AT7 ECC81 Tube made in Japan
Strong RCA Gray Plate Angled O Getter 12AT7 ECC81 Tube made in Japan
$13.49
Time Remaining: 1d 18m
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Strong Sylvania Black Plate Square D Getter 12AT7 ECC81 Tube
Strong Sylvania Black Plate Square D Getter 12AT7 ECC81 Tube
$13.49
Time Remaining: 1d 43m
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Strong Amperex Gray Plate O Getter 12AT7 ECC81 Tube
Strong Amperex Gray Plate O Getter 12AT7 ECC81 Tube
$22.49
Time Remaining: 1d 1h
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