ECC81 Square GETTER. Grey half smooth plate square getter Test: Hickok 1-117-B 4600 /5300 umhos gm strong No gas No shorts
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Authentic blackburn b4d3 etch code w/ nice gold silkscreen, thick top getter flashing w/ seam top + mullard box included. 1964 mullard are the top sonic echelon for their rich holographic sound reproduction, 2-year only special gold label limited run.
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Reference tube is tested first then the tube listed for sale.
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M8162 / CV4024 / ECC81 / 12AT7. DUAL MARKED M8162 CV4024 MILITARY PRINT. MULLARD MADE IN ENGLAND. MATCHED QUAD (4 TUBES). FACTORY CODES IN GLASS.
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12AT7 ECC81 Mullard dual triode tube. Not a reissue. Made in Gt. Britain with Blackburn code TK1/B8F.
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This premium grade low noise military selection 12at7 ecc81 upgrade (6201 equivalent) includes the oe box + pin protector. full mutual conductance test, pristine balance: +100 % gm (65) + leak/short/gas/life (key longetivity indicator).
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Has internal padding.
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