(!) (Single) E288CC=8223 Siemens Halske Germany NOS 1974 (36/35ma)

1 low noise tube)  E288CC=8223 Siemens Halske Germany NOS 1974 (N6-4K=1974)

1 section) 36ma Gm=19,500
1 section) 35ma Gm=20,500

NOS Ma = 30ma

NOS Gm = 18,000

Tested on Amplitrex

(Specs: Vfil=6.3 Ifil=0.475A, Vplatemax=250V Pwattsmax=3.0)

Typical Operation:
Va   Vg1   Ia     Ra     Gm  Rk    Mu
100 -1.5 30.0 1,400 18.0 350 20-25