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.

 




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NOS Matched Pair Sylvania USA 12AT7 ECC81 Black Plate  Get Vacuum Tubes
NOS Matched Pair Sylvania USA 12AT7 ECC81 Black Plate Get Vacuum Tubes
$31.96
Time Remaining: 19h 8m
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NOS Ken Rad GE USA JKR 12AT7 ECC81 Grey Plate Top  Get Vacuum Tube 100+
NOS Ken Rad GE USA JKR 12AT7 ECC81 Grey Plate Top Get Vacuum Tube 100+
$15.96
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GE 12AT7WB 12AT7 ECC81 Mil Spec Tubes Matched Pair NOS Tested
GE 12AT7WB 12AT7 ECC81 Mil Spec Tubes Matched Pair NOS Tested
$34.00
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Mullard Blackburn 12AT7 ECC81 Tubes Matched Pair Test NOS
Mullard Blackburn 12AT7 ECC81 Tubes Matched Pair Test NOS
$56.00
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NOS Matched Pair GE 12AT7 ECC81 Grey Plate Top  Get Vacuum Tubes
NOS Matched Pair GE 12AT7 ECC81 Grey Plate Top Get Vacuum Tubes
$17.56
Time Remaining: 19h 22m
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Sylvania USA JHS 12AT7WA ECC81 2 Grey Plate  Get 3 Mica Vacuum Tube 88 84
Sylvania USA JHS 12AT7WA ECC81 2 Grey Plate Get 3 Mica Vacuum Tube 88 84
$10.36
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Sylvania USA 12AT7 ECC81 2 Grey Plate Top  Get 3 Mica Vacuum Tube 68 122
Sylvania USA 12AT7 ECC81 2 Grey Plate Top Get 3 Mica Vacuum Tube 68 122
$3.96
Time Remaining: 19h 24m
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NOS Matched Pair Sylvania USA 12AT7 ECC81 Black Plate Top  Get Vacuum Tubes
NOS Matched Pair Sylvania USA 12AT7 ECC81 Black Plate Top Get Vacuum Tubes
$31.96
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Matched Pair GE USA 12AT7 ECC81 Grey Plate  Get Vacuum Tubes 95
Matched Pair GE USA 12AT7 ECC81 Grey Plate Get Vacuum Tubes 95
$15.96
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Date Matched Pair Sylvania 12AT7 ECC81 Grey Plate 3 Mica Vacuum Tubes 108 80
Date Matched Pair Sylvania 12AT7 ECC81 Grey Plate 3 Mica Vacuum Tubes 108 80
$19.96
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