Mullard Blackburn 12AX7 ECC83 Valve/Tube Short Ladder Plates, Halo Getter I61 B3I5 Blackburn Coded Tested Good on Avo VCM 163.. Ia 1.3/1.05 ~ Gm 1.6/1.5 100% Book Spec = Ia 1.2 - Gm 1.6 Supplied in White Box As Per Photo
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