GD-PARTS 1PC 8pin Octal Tube Socket Base For EL34 KT88 KT66 6550 KT120 274B 5AR4 6SN7 6V6 6L6 6CA7 5881 PCB Mount 8pin el34 gz34 kt88 6v6 6l6 5z3 6sn7 octal gold plated tube socket saver base