(SINGLE) EL153 Telefunken NOS 1960's (70ma)

EL153 Telefunken NOS 1960's original box

70ma

Gm=4700

SINGLE TUBE ONLY

Tested on Amplitrex

Vplate=500V

Vscreen=250V

Vgrid=-49V

Good Ma = 50ma

Good Gm = 4000 

notes:

10 pins

Power Tetrode