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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12AT7 CV4024 Mullard Pair Copper Plate NOS ECC81 UK Military
12AT7 CV4024 Mullard Pair Copper Plate NOS ECC81 UK Military
$19.50 (4 Bids)
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GE ELECTRON TUBE 6201 JG 12AT7WA  6201JG12AT7WA  UNTESTED
GE ELECTRON TUBE 6201 JG 12AT7WA 6201JG12AT7WA UNTESTED
$10.00
Time Remaining: 23h 42m
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Gold Plated Ceramic 9pin PCB Mounting Tube Socket for 12AX712AT7 6922 6n1
Gold Plated Ceramic 9pin PCB Mounting Tube Socket for 12AX712AT7 6922 6n1
$2.95
Time Remaining: 23h 58m
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NOS Brimar CV 4024 12AT7 WA Black Plate Super Premium Preamp Tube TWEED TONE
NOS Brimar CV 4024 12AT7 WA Black Plate Super Premium Preamp Tube TWEED TONE
$19.99
Time Remaining: 1d 34m
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GE 12AT7 Vintage Tube USA excellent condition ECC81 No Reserve
GE 12AT7 Vintage Tube USA excellent condition ECC81 No Reserve
$5.00
Time Remaining: 1d 40m

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Pile Mix 12AT7 ECC81 Twin Triode f Old Ham Radio Receiver Tube Guitar Audio Amp
Pile Mix 12AT7 ECC81 Twin Triode f Old Ham Radio Receiver Tube Guitar Audio Amp
$3.25 (3 Bids)
Time Remaining: 1d 1h 7m

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GE 12AT7 Vacuum Tube Square Getter Tested New on Calibrated Hickok
GE 12AT7 Vacuum Tube Square Getter Tested New on Calibrated Hickok
$19.95
Time Remaining: 1d 3h 49m
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Strong Sylvania Black Plate Angled D Getter 12AT7 ECC81 Tube
Strong Sylvania Black Plate Angled D Getter 12AT7 ECC81 Tube
$13.49
Time Remaining: 1d 3h 51m
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