(!!!) (Best Single) 127 Arcturus Blue Balloon tests like new 1930 era in white box (5.6ma) (High Ma and Gm)

1 tube) 127 Arcturus Blue Balloon tests like new 1930 era in white box

5.6ma

Gm=1000

Tested on Amplitrex

Vplate=250V

Vgriod=-21V

NOS Ma = 4-5ma

NOS Gm=800-900