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(!!!!!) (recommended pair) JAN-5691 Sylvania black plates NOS 1977 (2.8/3.1mA and 2.5/2.9mA) (Best 6SL7GT sub) (same internals as 5691 red base)

(!!!!!) (recommended pair) JAN-5691 Sylvania black plates NOS 1977 (2.8/3.1mA and 2.5/2.9mA) (Best 6SL7GT sub) (same internals as 5691 red base)

$ 199.99

1 low noise pair) JAN-5691 Sylvania black plates NOS 1977

1 tube) 2.8/3.1mA Gm=1800/1800

1 tube) 2.5/2.9mA Gm=1600/1700

 

- very good detail 

- low noise

  • reference tube
  • recommended for phono

 

NOS mA range 2.0mA+

NOS 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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