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2 x ECC88 HALTRON TUBE. JAPAN MADE. NEW OLD STOCK
TESTED IN AMPLITREX AT1000 TUBE TESTER:
121/124% EMISSION (EM) 88/89% TRANSCONDUCTANCE (GM)2.4/1.0 mA/V GAS
120/112% EMISSION (EM) 90/83% TRANSCONDUCTANCE (GM)1.0/1.2 mA/V GAS
RCB397