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5 X CK5687WA TUBE. NEW OLD STOCK IN ORIGINAL BOX.
BRANDS: RAYTHEON
HALO GETTER, BLACK PLATES
TESTED IN AMPLITREX AT1000 TUBE TESTER:
90/103% EMISSION (EM). 85/92% TRANSCONDUCTANCE (GM). 0.8/0.1mA/V GAS.
78/115% EMISSION (EM). 81/97% TRANSCONDUCTANCE (GM). 8.6/13.0mA/V GAS.
LOW EMISSION TRIODES. MINIMUM GOOD EMISSION = 60%
60/65% EMISSION (EM). 77/77% TRANSCONDUCTANCE (GM). 0.2/0.6mA/V GAS.
75/103% EMISSION (EM). 85/96% TRANSCONDUCTANCE (GM). 0.4/0.4mA/V GAS.
81/66% EMISSION (EM). 72/81% TRANSCONDUCTANCE (GM). 0.4/0.4mA/V GAS.