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(!!!!!) (Best Single) JAN-5691 Sylvania black plates NOS 1979 (2.4/2.5mA (Best 6SL7GT sub) (same internals as 5691 red base)

(!!!!!) (Best Single) JAN-5691 Sylvania black plates NOS 1979 (2.4/2.5mA (Best 6SL7GT sub) (same internals as 5691 red base)

$ 129.99

1 low noise tube) JAN-5691 Sylvania black plates NOS 1979

2.4mA Gm=1700

2.5mA Gm=1700

 

- very good detail 

- low noise

- reference tube

 

Good mA range 2.0mA+

Good Gm range 1500+

  

Recommended for

- Ampeg Heritage B-15
- Alessandro Itallian Greyhound jazz amp
- Alessandro Black and Tan 2005
- Almarro A318B
- Eddie Current

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