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(!!!!!) (Best Pair) JAN-5691 Sylvania black plates NOS 1977 (2.1/2.2mA and 2.1/2.3mA) (Best 6SL7GT sub) (same internals as 5691 red base)
(!!!!!) (Best Pair) JAN-5691 Sylvania black plates NOS 1977 (2.1/2.2mA and 2.1/2.3mA) (Best 6SL7GT sub) (same internals as 5691 red base)
$ 199.99
1 low noise pair) JAN-5691 Sylvania black plates NOS 1977 1-3% matched
1 tube) 2.1/2.2mA and Gm=1500/1600
1 tube) 2.1/2.3mA and Gm=1500/1600
- 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
See more: vacuum tube
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 (Best Pair) JAN-5691 Sylvania black plates NOS 1977 (2.1/2.2mA and 2.1/2.3mA) (Best 6SL7GT sub) (same internals as 5691 red base)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/products/1_3c3193a3-8df5-4a03-a39e-9d5d154fe01e.jpg?v=1660837737){kind=link}
 (Best Pair) JAN-5691 Sylvania black plates NOS 1977 (2.1/2.2mA and 2.1/2.3mA) (Best 6SL7GT sub) (same internals as 5691 red base) "Pin It")