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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.

 
1 NOS NIB RSD E81CC 12AT7WA tube
1 NOS NIB RSD E81CC 12AT7WA tube
US $14.99
See details @eBay 		NOS NIB RCA ATES 12AT7 ECC81 tube
NOS NIB RCA ATES 12AT7 ECC81 tube
US $19.99
See details @eBay 		MULLARD 12AT7 ECC81 TUBES NOS MATCHED PAIR
MULLARD 12AT7 ECC81 TUBES NOS MATCHED PAIR
US $60.00
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12AT7 ECC81 VINTAGE ELECTRONICS NOS TUBES GE
12AT7 ECC81 VINTAGE ELECTRONICS NOS TUBES GE
US $19.95
See details @eBay 		1x ECC81 12AT7 TELEFUNKEN NOS Tube Röhre Lampe TSF Valvola Valvula
1x ECC81 12AT7 TELEFUNKEN NOS Tube Röhre Lampe TSF Valvola Valvula
US $124.99
See details @eBay 		2 Siemens ECC81 12AT7 Audio Tubes Tube matched 4
2 Siemens ECC81 12AT7 Audio Tubes Tube matched 4
US $21.50
See details @eBay
12AT7 TUBE GOLD WRITING D GETTER 3 MICA PLATE TESTED STRONG
12AT7 TUBE GOLD WRITING D GETTER 3 MICA PLATE TESTED STRONG
US $40.00
See details @eBay 		1 Matched Pair PSVANE REFERENCE VACUUM Tubes 12AT7 T
1 Matched Pair PSVANE REFERENCE VACUUM Tubes 12AT7 T
US $89.99
See details @eBay 		MATCHED PAIR SIEMENS TUBES ECC81 12AT7 NOS SAME CODE 45° D GETTER
MATCHED PAIR SIEMENS TUBES ECC81 12AT7 NOS SAME CODE 45° D GETTER
US $16.00
See details @eBay
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