(!!) (Recommended Pair) 6CS7 Sylvania 1956 and Sylvania branded GM Delco “”D”” getter NOS 1956 with partially wrinkled top getter (19/10.8ma and 18.5/11.2ma) 1-3% matched

1 pair) 6CS7 Sylvania NOS large “”D”” getter tack welded to plate post 1956 same build

1 tube) 19ma Gm=4550 and 10.8ma Gm=2500 (GM Delco partially wrinkled top getter) (see photos) cosmetic only – does not effect performance of tube

1 tube) 18.5ma Gm=4500 and 11.2ma Gm=2600 (Sylvania)

for:

Leben CS 600 integrated amp
Leben CS 660P power amp