6N9S MELZ MATCHED PAIR BY CURVES! BALANCED! 1956 year! (6SL7 6SU7 1579) NOS

Match #1 Tube #NY4583D. Match #2 Tube #EY8U5R7. matched Tube #R1Q42UU. Match #3 Tube #0ZU9V10. Match #4 Tube #WSSNIR2. GOOD SECTION BALANCE! (less than 20%). Tube #G39IGOL.

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