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1 X A2900 TUBE. NEW OLD STOCK.
BRAND: UNITED ELECTRON. 1980s PRODUCTION.
BLACK PLATES, HALO GETTER.
TESTED IN AMPLITREX AT1000 TUBE TESTER:
76/110% EMISSION (EM) 82/94% TRANSCONDUCTANCE (GM) 0.6/1.6mA/V GAS