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4 X EL34 ULTRON TUBE. 1970s PRODUCTION.
GREY PLATES, HALO GETTER
MATCHED PAIR.
TESTED IN ROEHRENTEST TUBE TESTER
114% 113.9mA EMISSION (EM) 12.5mA/V TRANSCONDUCTANCE (GM)
119% 119mA EMISSION (EM) 12.88mA/V TRANSCONDUCTANCE (GM)
117% 116.9mA EMISSION (EM) 12.25mA/V TRANSCONDUCTANCE (GM)
116% 115.8mA EMISSION (EM) 12.38mA/V TRANSCONDUCTANCE (GM)
