(!!!!) (Best Pair) 6EW7 Hitachi Japan branded Westinghouse BIG BOTTLE NOS 1970-1972 (5.5/5.2ma and 52/56ma)

1 matched pair) 6EW7 Hitachi Japan branded Westinghouse BIG BOTTLE NOS 1970 era

1 tube) 5.5ma Gm=2100 and 52ma Gm=8600

1 tube) 5.2ma Gm=2100 and 56ma Gm=9000

(6EW7 is a close substitute to the 6DE7)

– Woo Audio 6
– Woo Audio 6 SE

RCA made skinny bottle 6EW7
Sylvania and Hitachi Japan made FAT BOTTLE 6EW7