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.

 




2 JHS 12AT7WA MILSPEC 12AT7 VACUUM TUBES AUDIO AMPLIFIER TV 7 TESTED
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LOT OF 5 NATIONAL 12AT7 ELECTRON TUBE 9 PIN NEW IN BOX
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TUBES 1 new GE 5 star tube 6201 12AT7 black plates triple mica WE Hickok test
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SYLVANIA 12AT7 ECC81 GREY PLATE HALO GETTER VACUUM TUBE TV 7 TESTED AUDIO AMP
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Vintage RCA Model 12AT7 Single Vacuum Tube Tested Very Clean See Photos
Vintage RCA Model 12AT7 Single Vacuum Tube Tested Very Clean See Photos
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1 PAIR GE 6201 VACUUM TUBES 5 STAR TRIPLE MICA TEST GOOD MILITARY 12AT7
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Electro Harmonix 12AT7WC 12AT7 Ultra Low Noise tubeNEW
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Sovtek EH Tube Kit Orange Dark Terror Amps w EL84 12AX7WA 12AT7
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Sovtek EH Tube Kit Orange Jim Root Terror Amps w EL84 12AX7WA 12AT7
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Sovtek EH Tube Kit Orange OR15H Amps w EL84 12AX7WA 12AT7
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Sovtek EH Tube Kit Epiphone Galaxie 25 Amps w EL84 12AX7WA 12AT7
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Sovtek EH Tube Kit Dr Z MAZ 8 Amps w EL84 12AX7WA 12AT7 5AR4
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2 12AT7 ECC81 RCA Tubes new tested
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Raytheon 12AT7 ECC81 Audio Radio tubes pair Tested
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Mullard ECC81 12AT7 Cryo and Matched Pair 2
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Mullard ECC81 12AT7 Cryo Single 1
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12AT7 SONOTONE ENGLAND  BRIMAR VINTAGE TUBE GM TESTED SUPERB
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Sylvania 12AT7 ECC81 Black Plates Vacuum Tube Very Strong Balanced 5700 5700
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Sylvania 12AT7 ECC81 3 Mica D Getter Vacuum Tube 1959 Strong 0715 0
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Vintage Philips ECG JAN 12AT7 ECC81 Bl Plates Big Halo Getter Vacuum Tube 1982
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3 NOS PEAVEY 12AT7 TUBES vintage Guitar amplifier still in package USA Super T
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Strong Shield Gray Plate Square D Getter 12AT7 ECC81 Tube
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Very Strong Matched Pair of Brimar 12at7 Ecc81 Vacuum Tubes Black Plates X Rare
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Vintage Strong  Balanced Telefunken 12at7 Ecc81 Vacuum Tube
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1 x 12AT7wa Westinghouse TubeBlack PlatesTested on TV 7Very Strong
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1 x 12AT7 ECC81 The Fisher Tube Very Strong  Balanced
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1 x JRP 12at7 Raytheon Tube Black PlatesD GetterVery Strong  BalancedMIL
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Gold plated 9pin B9A ceramic tube socket for ECC83 12AT7 6DJ8 5670 6922 12ax7 x5
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9pin B9A ceramic tube socket for ECC83 12AT7 6DJ8 12AX7 5670 with shield x4
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4PC 9Pin B9A Ceramic Tube Socket For 12AX712AU712AT7ECC82ECC83EL845670
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Vintage CBS 12AT7 tube USA Short Black Plate Halo Getter Tested Good
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TA 100 12AT7 TII Tube Headphone Amplifier Bluetooth XMOS U8 ES9018S DAC DSD
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NOS NIB Siemens 6201 12AT7WA Triple Mica Twin Triode Tube Germany
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TUNG SOL Green Label 12AT7 D Getter Vacuum Tube TV 7 Tested 101932
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Guitar Amp VacuumTubes EL84 6BQ5 12AX7 12AT7
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SG 300 Portable USB DAC Tube Headphone Amplifier 12AT7+CS4398+TPA6120A2
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SG 300 Portable PSVANE 12AT7 T Tube preamp Headphone Amp 24Bit 96KHz USB DAC
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SG 200 TINY TUBE DAC Headphone Amplifier 12AT7 Tube preamp
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SG 200 24Bit DAC decoder Tube Headphone Amplifier 12AT7+TPA6120A2+UAC3553B
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Tube Dampers Silicone Ring fit 12AX7 12AU7 12AT7 12BH7 EL84 50pcs for tube amp
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Tube Dampers Silicone Ring fit 12AX7 12AU7 12AT7 12BH7 EL84 100pcs for tube amp
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10Pcs 9Pin Vacuum Tube Socket Ceramic Valve Base for 12AU7 12AT7 Audio Amps DIY
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GE 12AT7 Vacuum Tube 6201 Tested a Balanced 3900 3900 on a Hickok 600A Tester
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2x RFT ECC85 6AQ8 B719 12AT7 Inclined O Getter 1960s 100 f Elk Amplifier
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GOLD US style Ceramic Tube Sockets ECC83 EL84 12AU7 EZ81 12AT7 EC88 B9A X10
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Dynascan 12AT7 ECC81 Dual Triode Vacuum Tube Taiwan Tested
Dynascan 12AT7 ECC81 Dual Triode Vacuum Tube Taiwan Tested
$10.99
Time Remaining: 20h 56m
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Tung Sol Tube Upgrade Kit For Carvin VTX 100 Amps EL34B 12AT7
Tung Sol Tube Upgrade Kit For Carvin VTX 100 Amps EL34B 12AT7
$119.00
Time Remaining: 21h 14m
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NEW JJ 12AT7 Preamp Vacuum Tube ECC81 Valve Fender tweed 12AX7 with lower gain
NEW JJ 12AT7 Preamp Vacuum Tube ECC81 Valve Fender tweed 12AX7 with lower gain
$10.75
Time Remaining: 21h 50m
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4 lot tubes lot 12AT7  GE PHILCO DUMONT NATIONAL UNION tested  s1
4 lot tubes lot 12AT7 GE PHILCO DUMONT NATIONAL UNION tested s1
$18.00
Time Remaining: 22h 18m
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1 SYLVANIA 6679 12AT7 ECC81 Black Ladder Plate Radio Vacuum TUBE Tested 100+
1 SYLVANIA 6679 12AT7 ECC81 Black Ladder Plate Radio Vacuum TUBE Tested 100+
$9.95
Time Remaining: 22h 25m
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MATCHED PAIR 6201 GE BLACK PLATE 3 MICA 12AT7WA MILITARY VACUUM TUBES
MATCHED PAIR 6201 GE BLACK PLATE 3 MICA 12AT7WA MILITARY VACUUM TUBES
$9.99
Time Remaining: 22h 37m

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NOS Pair Amperex Bugle Boy 12AT7WC ECC81 Audio Amplifier Tube ON SALE
NOS Pair Amperex Bugle Boy 12AT7WC ECC81 Audio Amplifier Tube ON SALE
$59.99
Time Remaining: 22h 41m
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ECC81 LOT OF 2 MATCHED Vintage 60s RFT Funkwerk Erfurt PAIR TUBES 12AT7 ECC801s
ECC81 LOT OF 2 MATCHED Vintage 60s RFT Funkwerk Erfurt PAIR TUBES 12AT7 ECC801s
$17.65
Time Remaining: 22h 44m

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