Brimar 12AX7 (ECC83) 1573 Double Triode Half Plate Halo Tests Good England See photos for condition. Tests good on Taylor Model 45C valve tester. Triode 1 mutual conductance reading Gm 2.5 Triode 2 mutual conductance reading Gm 2.3 100% factory data in Taylor manual at Gm 2.0 UK shipping with MyHermes Tracked or Royal Mail. International shipping with Royal Mail International Tracked. I will combine postage on multiple valve orders. See my other listings!
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