4 X ECC81 TUBE. 1960s MULLARD PROD. 1 MATCHED PAIR. USED. 110. CH168

4 X ECC81 TUBE. USED.

BRAND: VALVO, MINIWATT, POPE, PHILIPS. 1960s MULLARD PRODUCTION. B9A3, B7J1, B1A4, B6A1 DATE CODES.

GREY PLATES, HALO GETTER, 1 MATCHED PAIR.

TESTED IN ROEHRENTEST TUBE TESTER:

110/107% 10.977/10.669mA EMISSION (EM)

TESTED IN AMPLITREX AT1000 TUBE TESTER:

88/82% EMISSION (EM) 80/69% TRANSCONDUCTANCE (GM) 2.2/0.8mA/V GAS

70/96% EMISSION (EM) 67/92% TRANSCONDUCTANCE (GM) 0.8/0.6mA/V GAS

80/84% EMISSION (EM) 83/81% TRANSCONDUCTANCE (GM) 2.0/0.8mA/V GAS

CH168U1