(!!) (Recommended Pair) 5879 RCA branded Raytheon triple mica D getter NOS early 1960's (1.8ma and 1.5ma)

1 pair) 5879 RCA branded Raytheon triple mica D getter NOS early 1960's
1 tube) 1.8ma Gm=1000
1 tube) 1.5ma Gm=900

Matched on Amplitrex

Vplate=250

Vscreen=100V

Vgrid=-3

Good Ma range 1.5-1.8ma

Good Gm range 800-1000

- Divided by 13 RSA 31 amp
- Divided by 13 JRT 9/15
- AMPEX 620/621