High testing vintage tube 12AX7 / ECC83 Mazda, date 1959, long plates, large O getter.

Etched code: M7

Tube NOS (new old stock), NIB (new in box).

Tous les tubes ont été controlés bons sur analyseur Metrix LX109A (Courant anode Ia, pente S, gaz, court-circuits),

Test results:

@ Vp = 250V / Vg1 = -2V :

Triode 1: Ia = 1,70 mA / S = 2,00 mA/V      

Triode 2: Ia = 1,90 mA / S = 2,00 mA/V

(100% :   Ia = 1,20 mA / S = 1,60 mA/V)           

Garantie satisfait ou remboursé.

Registered shipping (with Tracking number), we combine shipping, just ask before paying.