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(!!!!) (Best Pair) 5691 RCA red base branded Sylvania and GE black plates NOS 1960-1965 (2.3/2.3ma and 2.2/2.4ma) 1-2% matched

(!!!!) (Best Pair) 5691 RCA red base branded Sylvania and GE black plates NOS 1960-1965 (2.3/2.3ma and 2.2/2.4ma) 1-2% matched

$ 299.99

1 low noise tube) 5691 RCA red base NOS 191965 same build

1 tube) 2.3/2.3ma Gm=1500/1600 branded Sylvania

1 tube) 2.2/2.4ma Gm=1500/1500 branded GE

 

- best sounding 6SL7GT sub

- very smooth, balanced, low noise

 

Good Current Range = 2-3ma

Good Gm range 1400-1600

 

Recommended for

- Line Magnetic LM-508IA

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

 

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