RCA 12AX7 TUBE for McIntosh MC-30 as pictured, circa 50s, square getter, long black ripple plate, in good condition (tested on my tube tester, where NOS tube normal ranged 105-110, min-good=65, max-good=120, tested tube = 107/106 respectively, no short, no leak) Note: The shown MC-30 schematic picture is using as reference only.