6SN7 / 5692 tubes

This 1950s-1960s RCA 6SN7GTB tube has a medium bottle, bottom D getter, and staggered black plates with copper grid posts. The black base has silver or red print with the RCA logo. Tube tests as new with very low noise.

The 1973 RCA 6SN7GTB tubes in this precisely matched pair have side O getters and black plates with a narrow coin base. The red print on the glass has the RCA logo. Both tubes test as new with balanced sections and low noise.

The 1957 RCA 6SN7GTB tubes in this precisely matched pair have staggered black plates and bottom D getters. The silver print on the bases has the RCA logo. One tube has a slightly tilted bottle (see photo). Both tubes test as new with balanced sections.

The 1950s Sylvania 6SN7GTA tubes in this precisely matched pair have black plates and halo getters with lots of chrome flashing. The black bases have green print with the old Sylvania lightning logo. Both tubes test as new with low noise.

This 1950s Sylvania 6SN7GTA tube has a medium bottle, black plates, and a halo getter with lots of chrome flashing. The black base has green print with the Sylvania logo. Tube tests as new.

The 1960s Sylvania 6SN7GTB tubes in this precisely matched pair have black plates and lots of chrome flashing. The silver print on the bases has the GM Delco logo. Both tubes test as new with balanced sections.

This 1960s Tung-Sol 6SN7GTB tube has has a tall bottle, black plates, and a horseshoe getter. The black base has white print with the Tung-Sol logo. Tube tests as new with balanced sections and very low noise.

This 1960s Tung-Sol 6SN7GTB tube has has a tall bottle, black plates, and a horseshoe or halo getter. The black base has white print with the Tung-Sol logo. Click "more info" for current availability.

This new production Tung-Sol 6SN7GTB tube was made in Russia. It has black plates, a top dish getter, and extra support rods. The brown base has white print with the Tung-Sol logo.