GE 12AZ7A Vacuum Tube TESTED 100/100 Black Plate D-Getter 12AT7 Sub McIntosh Amp
Military Equivalent: N/A (12AZ7A is a specialized low-noise/high-gain version of the 12AT7/ECC81). This tube is a premium substitute for 12AT7/ECC81 applications where higher gain and lower noise are required.