(!!) (Recommended Pair) 7591A Sylvania used/tests like new 1960's (60.6ma and 64.5ma)
$ 159.99
1 pair) 7591A Sylvania black base used/tests like new 1960's same build in white boxes
1 tube) 64.5ma Gm=9900 Sylvania Fisher 1965
1 tube) 60.6ma Gm=9100 Sylvania 1960's
Tested on Amplitrex
Vplate = 300
Vscreen = 300
Vgrid = -10
Good used Ma range 40-50
Good used Gm range 8,000 - 9,000
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
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 (Recommended Pair) 7591A Sylvania used/tests like new 1960's (60.6ma and 64.5ma) "Pin It")