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(!!!!!) (3rd Best Siemens Pair 1968) CV492=ECC83=12AX7 Siemens Halske Germany NOS 1968 1-2% matched (1.1/1.1ma and 1.1/1.2ma) (best in phono stages and high end preamps)

(!!!!!) (3rd Best Siemens Pair 1968) CV492=ECC83=12AX7 Siemens Halske Germany NOS 1968 1-2% matched (1.1/1.1ma and 1.1/1.2ma) (best in phono stages and high end preamps)

By Tube World

$ 399.99

1 low noise matched pair) ECC83=12AX7 Siemens Halske Germany ribbed plates NOS 1968 (163 series) 1-2% matched (CV492=low noise grade)

1 tube) Gm=1700/1700 (1.1/1.2ma)

1 tube) Gm=1600/1700 (1.1/1.1ma)

 

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