Input transformer pair sales primary: 5 kΩ/primary series (driver tube RP = 3 k to 7 kΩ recommended), 1.25 kΩ/primary para (driver tube RP = 750 to 1.75 kΩ recommended) primary side inductance 50 h/15 mA (primary series), 13 h/30 mA (primary para) transformer ratio 1+1:1+1 (primary: secondary) DC resistance 340 Ω (all primary), 440 Ω (all secondary) W50 x D55 x H95 mm 0.78 kg original box, specifications, specifications The book is in good condition with a TANGO badge (Kojima Yosuke)
Accessories: original box (with slight writing), specifications, TANGO badge