Tung-Sol 6SL7GT - black plates, triple mica

This 1960s Tung-Sol 6SL7GT tube has a tall bottle, ribbed gray plates, and a halo getter. The black base has white print with the Tung-Sol logo. Tube tests as new with balanced sections and low noise.

This rare Tung-Sol 6SU7GTY is a premium quality 6SL7 tube type selected for section balance and low noise. It has round plates and black glass. The white print on the glass has the RCA label. Tube tests as new with balanced sections and very low noise.