FOR SALE: 2 X W77 TUBE. NEW OLD STOCK.

BRAND: EMITRON. 1950s PRODUCTION.

GREY PLATES, HALO GETTER, MATCHED PAIR.

THE SECOND TUBE HAS THE LOGO DAMAGED.

TESTED IN ROEHRENTEST TUBE TESTER

102% 8.142mA EMISSION (EM). 1.69mA/V TRANSCONDUCTANCE (GM)

115% 9.237mA EMISSION (EM). 3.01mA/V TRANSCONDUCTANCE (GM)