(!!!!) (Recommended Pair) 6EW7 Hitachi Japan branded Westinghouse BIG BOTTLE NOS 1971 (5.3/5.4ma and 58/55ma)

1 matched pair) 6EW7 Hitachi Japan branded Westinghouse BIG BOTTLE NOS 1971

1 tube) 5.3ma Gm=2100 and 58ma Gm=9400

1 tube) 5.4ma Gm=2100 and 55ma Gm=8800

(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