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3 X EF86 TUBE. NEW OLD STOCK IN ORIGINAL BOX.
BRAND: ZAERIX. 1960s RUSSIAN PRODUCTION.
MESH PLATE, INVERTED CUP GETTER, MATCHED TRIO.
TESTED IN AMPLITREX AT1000 TUBE TESTER:
96% EMISSION (EM) 100% TRANSCONDUCTANCE (GM) 0.2mA/V GAS
103% EMISSION (EM) 105% TRANSCONDUCTANCE (GM) 0.0mA/V GAS
106% EMISSION (EM) 105% TRANSCONDUCTANCE (GM) 0.0mA/V GAS
CH165U1