7591 Westinghouse branded as Harmon Kardon used/65% 1960-1963 (40ma, Gm=6500)
$ 39.99
1 tube) 7591 Westinghouse branded as Harmon Kardon used/65% 1960-1963
Tested on AMplitrex
1 tube) 40ma Gm=6500
Vplate=300V
Vscreen=300V
Vgrid=-10V
Good Ma used = 40-50ma
Good Gm used = 8000-9000
Recommended for
AUDIO GUILD CORP BONHAM 330 1960's
Ampeg Gemini II G-15
Ampeg Reverberocket II 1960's
McIntosh 225
Mcintosh MA230 early 60's
McIntosh MAC-1500 1965
Scott
Harmon Kardon
Fisher Receivers
Sansui
Sherwood S5000II
McIntosh 225
Fisher 500C 1964
Scott 299C
Scott LK-72
Scott 340B 1964
Univox U305R
Sansui 1000a 1970
Eico ST-70
See more: vacuum tube