5879 Sylvania branded RCA NOS 1977 (1.4ma)
$ 9.99
5879 Sylvania branded RCA NOS 1977 small mica flake inside tube
1.4ma
Gm=800
Tested on Amplitrex
Vplate=250
Vscreen=100V
Vgrid=-3
Good Ma range 1.5-1.8ma
Good Gm range 800-1000
recommended for:
- Divided by 13 RSA 31 amp
- Divided by 13 JRT 9/15
- AMPEX 620/621
See more: vacuum tube
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