(!!) 6EW7 Sylvania BIG BOTTLE branded GE NOS 1960's (3.5/36.5ma)

1 tube) 6EW7 Sylvania BIG BOTTLE branded GE NOS 1967 (LW)

1 triode section) 3.5ma  Gm=1700 

1 triode section) 36.5ma Gm=6100

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