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(!!) (Recommended Pair) 7591A Sylvania used/tests like new 1960's (60.6ma and 64.5ma)

$ 157.99

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

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