Mullard KB/D CV4004 ECC83 M8137 Box Plate Valve Tube NOS (V35)

CV4004 M8137 ECC83 Valve Tube. Grey Box Plates, Halo Getter. Fully Tested on AVO VCM 163. 100% Book Spec = Ia 1.2 - Gm 1.6. This Valve = Ia 1.1/1 - Gm 1.6/1.5.