6GT5A Sylvania branded GE tipped top NOS 1960”s (78ma, Gm=7700) Title: 6GT5A

1) 6GT5A Sylvania branded GE tipped top NOS 1960”s (78ma, Gm=7700)

(6GT5=repackaged 6DQ6B, 17 watts, same pinout as 7868)

Tested on Amplitrex (per spec sheet)

Vplate=250V

Vscreen=150V

Vgrid=-22.5V

Good Ma = 60-75ma

Good Gm = 6500-7100

– Frazier F106C mono amps