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1 X 6135 / EC90 TUBE. USED.
BRAND: GENERAL ELECTRIC. 1950s PRODUCTION.
GREY PLATES, RECTANGULAR GETTER, 3 MICA, ***** STARS.
TESTED IN ROEHRENTEST TUBE TESTER:
96% 10.062mA EMISSION (EM) 2.13mA/V TRANSCONDUCTANCE (GM)
CH168U1