They are carefully tested on my tube tester TV-7D/U at the good range 73-74/50 min with 77-78=100% tightly balanced with no short and no gas. What you see is what you get. an invoice. Besides, Vietnam.
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I'm going to list more matched tubes (Amplitrex AT1000) the next few coming months.
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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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A collectible rare audiophile darling! premium brimar cv military series ~ a beautiful open tone w/ revered black plate dynamics. rare 3-mica series w/ rugged internals + unique stabilizer engineering, to reduce distortion and minimize noise/microphonics.
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ECC81 12AT7. MULLARD – HOLLAND. D GETTER WITH FOIL STRIP.
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Has slightly lower gain which may not even be noticed. In most cases will replace the hard to find and expensive 12AX7/ECC83.
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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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Two pieces of East-German RFT ECC81 / 12AT7 variant with smooth plates and snall O getters. The tubestest over 100%. Tested as 100%+ No warranty or safety certification. GDPR Notice.
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