2 x ECC83 12AX7 PHILIPS HYPERLEC BRIVE / Mullard Plate / Tested Strong NOS Rare

Lot of 2 NOS HYPERLEC BRIVE ECC83 / 12AX7 Double Triode Audio Tubes. Where 100% is Ia = 1,20mA S = 1,6mA/V. Ia2 = 1,70mA S = 1,90mA/V. Ia1 = 1,20mA S = 1,66 mA/V.

Ia2 = 1,70mA S = 1,80mA/V.