6SN7 / 5692 tubes

The 1960s GE 6SN7GTB tubes in this precisely matched pair have side O getters and gray plates with copper posts. The yellow print on the base has the Realistic logo. Both tubes test as new with balanced sections and low noise.

This rare 1963 RCA 6SN7GTA tube has a halo getter, and black plates with copper grid posts. The white print on the glass has the ITT logo and says "Japan" on the base. Tube tests as new with balanced sections and very low noise.

The late 1960s 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 1951 Sylvania 6SN7GT tubes in this precisely matched pair have ladder-style black plates with copper grid posts and bottom D getters with lots of flashing. The green print on the bases has the Sylvania lighting logo. Both tubes test as new.

The 1950s Westinghouse 6SN7GTB tubes in this precisely matched pair have black plates with copper grid posts and D getters. The yellow print on the bases has the Westinghouse logo. Both tubes test as new with balanced sections and very low noise.