5 X 12AV7 RCA TUBE. 1960s PROD. BLACK PLATES. QUINTET. 16. CB399

5 X 12AV7 TUBE. NEW OLD STOCK IN ORIGINAL BOX.

BRAND: RCA. 1960s PRODUCTION.

BLACK PLATES, HALO GETTER, COPPER RODS, MATCHED QUINTET.

TESTED IN AMPLITREX AT1000 TUBE TESTER:

100/90% EMISSION (EM) 106/96% TRANSCONDUCTANCE (GM) 0.0/0.0mA/V GAS

106/91% EMISSION (EM) 114/103% TRANSCONDUCTANCE (GM) 0.0/0.0mA/V GAS

122/114% EMISSION (EM) 123/110% TRANSCONDUCTANCE (GM) 0.0/0.0mA/V GAS

113/92% EMISSION (EM) 112/98% TRANSCONDUCTANCE (GM) 0.0/0.0mA/V GAS

98/107% EMISSION (EM) 105/109% TRANSCONDUCTANCE (GM) 0.0/0.0mA/V GAS