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2 X 12BY7A / 12BV7 / 12DQ7 TUBE. NEW OLD STOCK IN ORIGINAL BOX.
BRAND: SYLVANIA / RCA. 1950/60s PRODUCTION.
BLACK PLATES, D-GETTER / HALO GETTER.
TESTED IN AMPLITREX AT1000 TUBE TESTER:
102% EMISSION (EM) 126% TRANSCONDUCTANCE (GM) 3.4mA/V GAS
103% EMISSION (EM) 102% TRANSCONDUCTANCE (GM) 2.3mA/V GAS
CH168U1
