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2 X ECC189 TUBE. NEW OLD STOCK IN ORIGINAL BOX.
BRAND: TRIGON. 1960s PRODUCTION.
GREY PLATES, HALO GETTER, MATCHED PAIR.
TESTED IN AMPLITREX AT1000 TUBE TESTER:
109/101% EMISSION (EM) 113/110% TRANSCONDUCTANCE (GM) 0.6/0.4mA/V GAS
116/100% EMISSION (EM) 134/112% TRANSCONDUCTANCE (GM) 0.6/0.6mA/V GAS
CH163 U1