Quad RCA Raytheon GE 12AT7 ECC81 Audio Tubes. #1 and #4 would be a matched pair. Tested Good @ 90/102, 101/120, 83/71 and 91/105 with a minimum of 55/55.
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Model 12AT7WC. 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.
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Made in Blackburn England. Made in Blackburn England. ____ ______. Tested in my preamplifier to make sure working as intended with no issues at all. where minimum good value is 2500.
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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.
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Mullard New Logo M8162 Dual Triode. Equivalent to ECC81 12AT7. Special Quality Military Spec. Valve / Tube. I have (briefly) tried this in an amplifier setup that I have and it works well.
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PairNOS BVA ECC81 badged Mazda. BVA made in England. Halo getter. two NOS valves included in this sale. Tube 1 = 9.6/6.0 11.5/6.5. Tube 2 = 12/6.2 12/7.0.
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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.
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(2) Date Matched Stewart Warner SW 12AT7 / ECC81 TUBES STRONG! (TESTED W/ TV-7D).
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