(!!!!!) (Best Siemens Pair) ECC83=12AX7 Siemens Halske Germany NOS 1967 1-3% matched (1.0/1.2ma and 1.0/1.0ma)

$ 379.99

1 low noise matched pair) ECC83=12AX7 Siemens Halske Germany ribbed plates NOS 1967 same date codes (163 series) 1-3% matched in white boxes from bulk pack of 200

1 tube) 1.0/1.2ma and Gm=1600/1800

1 tube) 1.0/1.0ma and Gm=1650/1750 faded printing


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