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3 X 6J7G TUBE. USED.
BRAND: SYLVANIA. 1950s PRODUCTION.
BLACK PLATES, FLAT GETTER, MATCHED PAIR + 1 TUBE.
TESTED IN ROEHRENTEST TUBE TESTER:
115% 2.307mA EMISSION (EM) 1.22mA/V TRANSCONDUCTANCE (GM)
95% 1.894mA EMISSION (EM) 1.23mA/V TRANSCONDUCTANCE (GM)
79% 1.579mA EMISSION (EM) 1.1mA/V TRANSCONDUCTANCE (GM)
CH168U1