Log-in

(!!!) (~ Best 5691 Pair ~) 5691 RCA Red Base Black Plates NOS 1959 (2.7/2.8ma and 2.8/3.1ma)

$ 298.88

1 Matched Pair NOS)  5691 RCA RED BASE NOS original boxes 1959

1 tube) 2.7/2.8ma Gm=1700/1700 (59-17=1959)

1 tube) 2.8/3.1ma Gm=1700/1900 (59-52=1959)

 

Good Current Range = 2-3ma

Good Gm range 1500-1600

 

  • Matched on AMPLITREX and in tested in headphone amp for noise
  • Low Noise and not microphonic
  • best 6SL7GT sub
  • very smooth sound, low noise

Recommended for

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

 

See more: vacuum tube
Scroll to top