Brimar 12AX7/ECC83 1951 Long Black Plate Sqr Gtr Vacuum Tube/Valve - AVO tested
Brimar 12AX7/ECC83 Vacuum Tube/Valve - 1951 Long Black Plate - Square Getter. AVO tested strong and balanced. 1st week of June1951 in the Footscray STC plant in the UK. AVO NOS Specs: IA = 1.2 GM = 1.6.