(!!) (Recommended Pair) 12AZ7A GE Admiral black plates NOS 1960 (8/9ma and 8/10ma) (McIntosh MC275)

1 pair) 12AZ7A GE Admiral black plates NOS 1960

1 tube) 8/9ma and Gm=4900/5400

1 tube) 8/10ma and Gm=4900/5600

Good Ma range 8-10ma

Good Gm range 4500-5500

– 12AZ7A is very similar to 12AT7

– 12AZ7A in McIntosh MC275