(!!) 6SL7GT Sylvania NOS branded Zenith 1950's tall bottle (3.0/2.9ma)

1 low noise tube) 6SL7GT Sylvania NOS branded Zenith tall bottle 1950's in white box

3.0ma Gm=1500

2.9ma Gm=1400
 

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