6350 Sylvania black plates "U" getter halo used/good 1956, faded printing in white box

1 section) 8.2ma Gm=3900

1 section) 8.8ma Gm=3800

Tested on Amplitrex

Vplate=150V

Vgrid=-5V

Good used Ma per section = 7-10ma

Good used Gm per section = 4000-4500

Recommended for

- VTL Wotan MB1250, VTL MB450, VTL MB300, VTL 225 Deluxe, VTL Deluxe 140, VTL Stereo 120/50, VTL ST150
- VTL Siegfried
- Joule Electra LA-150 (mk2)

- Joule Electra LA 100 Mk.III

- Shindo-lab Corton