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2 X ECC83 TUBE. NEW OLD STOCK.
BRAND: TESLA (LEFT ONE), ANNA SEGHERS (RIGHT ONE). 1960-70s PRODUCTION.
GREY PLATES, SOLID GETTER (LEFT ONE), HALO GETTER (RIGHT ONE), MATCHED PAIR.
TESTED IN AMPLITREX AT1000 TUBE TESTER:
83/91% EMISSION (EM) 100/106% TRANSCONDUCTANCE (GM) 0.7/0.4mA GAS
91/91% EMISSION (EM) 101/93% TRANSCONDUCTANCE (GM) 0.8/0.3mA GAS
