NOS ON Tv7. NOS tubes fall within the Gm characteristic range of an average tube, as published in the RCA RECEIVING TUBE MANUAL, which states "Individual tubes, like any manufactured product, may have characteristics that range above or below the values given.
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What you see is what you get.
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Electro-Harmonix tubes are among the highest quality. Engineered, designed, and manufactured to exacting standards for musicality and overall warmth, you can trust an Electro-Harmonix tube to deliver premium tone.
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Made in Slovak Republic. Long Plate. Boxes are in poor condition. Tested in my preamplifier to make sure working as intended with no issues at all. with no shorts, leakage or gas. ____ ______. where minimum good value is 1950.
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I63 B7K3 Blackburn Code in the Glass. ECC83 12AX7 Valve Tube. Mullard, Made in Great Britain. Blackburn Production.
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I63 B5H1 Code in the Glass. Yellow Print ECC83 12AX7 Valve Tube. Mullard, British Made. Short Grey Plates, Halo Getter.
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Electro-Harmonix tubes are among the highest quality. Engineered, designed, and manufactured to exacting standards for musicality and overall warmth, you can trust an Electro-Harmonix tube to deliver premium tone.
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CV492 ECC83 12AX7 grey Plate Used Old Stock Valve Tube Hickok gm 2300/2200 mhos gm
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