4 X 6DJ8 / ECC88 TUBE. USED.

BRAND: AMPEREX BUGLE BOY. 1960s PHILIPS PRODUCTION. ◿5E2 DATE CODES.

GREY PLATES, HALO GETTER, MATCHED QUAD.

ALL TUBE HAVE THE SAME DATE CODES.

TESTED IN ROEHRENTEST TUBE TESTER:

105/76% 15.749/11.414mA EMISSION (EM)

100/78% 15.074/11.631mA EMISSION (EM)

104/75% 15.074/11.211mA EMISSION (EM)

98/80% 14.689/12.081mA EMISSION (EM)

CH168U1