Mullard ECC83 12AX7 B4C4 C AT1000 Tested USED Valve Tube JUL19K
Fully Tested on the Amplitrex AT1000 Tester. Fully Testedon the Amplitrex AT1000 Tester. Mullard ECC83 12AX7. Test results This Valve. All parcels with value ofGBP20 and over. IA: 1.1 = 91% GM: 1.5 = 93%.