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(!) (~ Recommended Pair ~) 12SF5 National Union NOS 1950-1951 (1.1ma and 1.2ma) (Berning)

(!) (~ Recommended Pair ~) 12SF5 National Union NOS 1950-1951 (1.1ma and 1.2ma) (Berning)

$ 13.99

1 pair) 12SF5 National Union NOS 1950-1951

1 tube) 1.1ma Gm=1500

1 tube) 1.2ma Gm=1600 

 

Good NOS Ma = 0.8 - 0.9ma 

Good NOS Gm = 1500

 

- David Berning phono preamp

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