Model 12AT7. 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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(TESTED W/ TV-7D).
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Hickok test 5100/5100 umhos gm new test !
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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.
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ECC81 12AT7 Valve Tube. Mullard, British Made. Grey Plates, Halo Getter, Mottled Glass Construction. KB/D Military Print, 650 Code in the Glass.
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The Mullard ECC81 valve is a vintage electronic component manufactured in the United Kingdom. Known for its high quality and reliability, Mullard was a well-respected brand in the production of valves and vacuum tubes. This ECC81 model, commonly used in audio equipment, offers a piece of history in the world of sound and vision technology. Despite not having a manufacturer warranty, Mullard valves are sought after by enthusiasts for their distinctive sound characteristics and enduring performance.
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Nos Tube. Original issue box included.
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This special sound characteristic can only be found on Valvo Hamburg tubes. And because of the added substance in sound, the overall tonality of these tubes feels sweet, warm and musical, and the ambient clues sound closer to your ears.
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