AMPEREX BUGLE BOY 6DJ8 ECC88 TUBO SINGOLO D GTR SUPER SWEET SOUND 1959
6DJ8, ECC88. CURVE TRACER BALANCED! THESE TUBES HAVE BEEN CURVE TRACER MATCHED. THE CURVES SHOWN IN THE PICTURES ARE OF EACH TRIODE. EXAMINE THE CURVES FOR LINEARITY. THESE ARE THE ONES YOU HAVE BEEN LOOKING FOR.