1 x Mullard ECC82 / 12AU7 Shortplate. Used – tested OK on uTracer. Has been on storage since 1976. View calibrated uTracer6 test-report on image.
Mullard ECC82 / 12AU7. Date code: B9I5 = (B = Blackburn, 9 = 1969 (matched with logo also), I = September , 5 = Week 5 of the production month)
New Old Stock tubes, not tested for RoHS compliance. Only for repair and restoration of historical equipment.