12AXY, 12AT7, and 12AU7, can still be confusing to differentiate and understand which is used for what purpose and whether one can be substituted for another. Below we will try to clarify the most common differences between the 12AXY, 12AT7, and 12AU7, and in what circumstances they can be interchangeable.
eBay
Sourced from and matched by Tube Amp Doctor Germany. Rare and hard to find good legitimate ones matched like these.
eBay
Model 12AT7WA. Double Triode. Designed as a grounded grid radio frequency amplifier or as a combined oscillator and mixer at frequencies below appr. 300 mC, mostly used in guitar amplifiers.Found in many high fidelity applications, as each triode section in normal use operates as a class A amplifier.
eBay
Double Triode. Designed as a grounded grid radio frequency amplifier or as a combined oscillator and mixer at frequencies below appr. 300 mC, mostly used in guitar amplifiers.Found in many high fidelity applications, as each triode section in normal use operates as a class A amplifier.
eBay
ECC81 Mullard. Valve / Tube. All parcels with value of GBP20 and over. Fully Tested.
eBay
Matched Pair ECC81 12AT7 Valves Tubes. Toshiba, Made in Japan. Fully Tested & Electrically Matched.
eBay
2 X ECC81 TUBE. 1960s PRODUCTION. TESTED IN AMPLITREX AT1000 TUBE TESTER 78/106% EMISSION (EM) 73/94% TRANSCONDUCTANCE (GM) 0.2/0.6mA/V GAS.
eBay
Model 12AT7WA. Double Triode. Designed as a grounded grid radio frequency amplifier or as a combined oscillator and mixer at frequencies below appr. 300 mC, mostly used in guitar amplifiers.Found in many high fidelity applications, as each triode section in normal use operates as a class A amplifier.
eBay