2 Stück NOS M8137 CV4004 ECC83 12AX7 Brimar 60er Jahre Matched Pair
33,89 €
Those tubes are matched On the glass on one tube is etched/printed 3B2/3977 and on the other 3U2/3977. Tube2: Ia1=1,00mA gm1=1,75mA/V Ia2=1,06mA gm2=1,75mA/V. Tube1: Ia1=1,05mA gm1=1,75mA/V Ia2=1,00mA gm2=1,65mA/V.
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