5U4 MARCONI MADE IN ITALY DOUBLE DD SIDE GETTER TV7 TEST 59 (40=100%) ~ 274B WE 

 TEST RESULTS ON TV7 TUBE TESTER MILITARY VERSION 

SYSTEM 1 = 59 (WHERE 40= 100%) 

SYSTEM 2 = 59 (WHERE 50= 100%) 

BALANCED & STRONG TUBE MADE IN ITALY