2 X EC81 VALVE TUBE. NEW OLD STOCK.
BRAND: VALVE. 1960s PHILIPS PRODUCTION
GRAY PLATES, HALO GETTER, GOLD PIN, COPPER RODS, MATCHED PAIR.
TESTED IN FUNKE W20 TUBE TESTER:
MINIMUM GOOD EMISSION = 60% = 10mA
17mA EMISSION (EM)