6SK7 GE metal NOS 1977 in Sylvania box (8.2ma) Title: 6SK7 GE

6SK7 GE metal NOS 1977 in Sylvania box

8.2ma

Gm=1900

Good Ma range 8-9ma

Good Gm range 1800-2000

– Wards Airline 04wg.819a 1941
– Hallicrafters S-77 1950