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2 X EL34 ULTRON TUBE. 1960s HITACHI PRODUCTION.
BLACK PLATES, HALO GETTER ON TOP AND ON THE SIDE
MATCHED PAIR.
TESTED IN ROEHRENTEST TUBE TESTER
101% 101.3mA EMISSION (EM) 10mA/V TRANSCONDUCTANCE (GM)
103% 102.9mA EMISSION (EM) 12mA/V TRANSCONDUCTANCE (GM)