Mullard KB/D CV4004 ECC83 M8137 Box Plate Valve NOS Boxed (V4) #2

CV4004 M8137 ECC83 12AX7 Valve Tube. Grey Box Plates & Halo Getter. Fully Tested on AVO VCM 163. Ia 1.05/1.25 - Gm 1.4/1.5.

100% Book Spec = Ia 1.2 - Gm 1.6. NOS, Supplied in Mullard Box.