2 X EL506 TUBE. USED.

BRAND: BRIMAR. 1960s PRODUCTION.

GRAY PLATES, HALO GETTER, MATCHED PAIR.

TESTED IN ROEHRENTEST TUBE TESTER:

82% 49.46mA EMISSION (EM) 10.13mA/V TRANSCONDUCTANCE (GM)

93% 55.61mA EMISSION (EM) 10.63mA/V TRANSCONDUCTANCE (GM)

CH168U1