6 X 6F6G RCA TUBE. 1950s PROD. BLACK PLATES. MATCHED SEXTET. RCB409

6 X 6F6G TUBE. NEW OLD STOCK IN ORIGINAL BOX.

BRAND: RCA. 1950s PRODUCTION.

MATCHED SEXTET. RECTANGULAR GETTER BLACK PLATES.

TESTED IN AMPLITREX AT1000 TUBE TESTER:

105% EMISSION (EM) 107% TRANSCONDUCTANCE (GM) 2.6mA/V GAS

104% EMISSION (EM) 103% TRANSCONDUCTANCE (GM) 1.6mA/V GAS

108% EMISSION (EM) 108% TRANSCONDUCTANCE (GM) 4.1mA/V GAS

102% EMISSION (EM) 105% TRANSCONDUCTANCE (GM) 1.4mA/V GAS

108% EMISSION (EM) 107% TRANSCONDUCTANCE (GM) 2.4mA/V GAS

102% EMISSION (EM) 108% TRANSCONDUCTANCE (GM) 1.4mA/V GAS