Mullard ECC81 (12AT7) D Getter Valve Tube Tests Good Made in England Tk1 B6K See photos for condition. Tests good on Taylor Model 45C valve tester. Triode 1 mutual conductance reading Gm 7.1 Triode 2 mutual conductance reading Gm 6.6 100% factory data in Taylor manual at Gm 5.5 UK shipping with MyHermes Tracked or Royal Mail. International shipping with Royal Mail International Tracked.
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