(!!) (Best Single #2) 6EW7 Sylvania BIG BOTTLE NOS 1960”s (5.3/46ma) (highest Ma and Gm)

1 tube) 6EW7 Sylvania BIG BOTTLE NOS 1970”s

1 triode section) 5.3ma Gm=2000

1 triode section) 46ma Gm=8600

Tested on Amplitrex AT1000

Section 1 reference = 4-6ma and Gm=1700-2100

Section 2 reference = 45-50ma and Gm=7000-8000

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

– Woo Audio 6
– Woo Audio 6 SE

RCA made skinny bottle 6EW7
Sylvania made FAT BOTTLE 6EW7