Input transformer sold AB2 class push-pull driver primary coil unbalanced DC value 2mA winding ratio (all primary: secondary) 1.4:1 primary side A grade applications: push-pull 12AU7, 12BH7 secondary side AB2 grade applications: push-pull 2A3, 6RA2 W58 x H70 x D53mm 0.66 kg/piece (actual measurement, not including protrusions) in good condition with original box and catalog (Kojima Yosuke)
Accessories: original box, catalog
Main specifications: resistance values between terminals using a simple tester No. 1-3:515/518Ω, No. 2-4:562/563Ω, No. 9-11:265/266Ω, 10-12:272/272Ω