The 1962-63 GE 6SN7GTB tubes in this precisely matched pair have side O getters and gray plates with copper posts. The white print on the base has the GE logo. Both tubes test as new with balanced sections and low noise.
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This 1959 Raytheon 6SN7GT has shiny black plates with copper grid posts and support rods. The yellow print on the base has the Raytheon logo. Tube tests as new with balanced sections and very low noise.
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This rare 1954 RCA 6SN7GTA tube has a short bottle, side D getter, and black plates with copper grid posts. The silver print on the base has the RCA logo. Tube tests as new with balanced sections and very low noise.
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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.
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The early 1960s RCA 6SN7GTB tubes in this precisely matched pair have staggered black plates and bottom D getters. The orange or silver print on the bases has the RCA logo. Both tubes test as new with balanced sections and low noise.
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This early 1950s Sylvania 6SN7GT tube has a medium bottle, bottom getter, and early black plates with 2 rivets. The full black base has green print with the Sylvania lightning logo. Tube tests as new.
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This early 1950s Sylvania 6SN7GT tube has a medium bottle, bottom getter, and early black plates with 2 rivets. The silver print on the base is labeled for Ken-Rad or GE. Tube tests as new with balanced sections.
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This 1953 Sylvania 6SN7GTA tube has a short bottle, early black plates, and lots of chrome flashing. The green print on the base has the Sylvania lightning logo. Tube tests as new with balanced sections and low noise.
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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.
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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.
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This 1960s Sylvania 6SN7GTB tube has a tall bottle, black plates, and a halo getter with lots of chrome flashing. The yellow print on the base has the Sylvania lightning logo. Tube tests as new with low noise.
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The 1966 Sylvania 6SN7GTB tubes in this precisely matched pair have tall bottles, black plates, and top getters with lots of chrome flashing. The green labels have the Sylvania lightning logo and matching date codes. Both tubes test new with low noise.
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This 1960s Sylvania 6SN7GTB tube has a medium bottle, black plates, and a halo getter with lots of chrome flashing. The black base has yellow or green print with the Sylvania logo. Tube tests as new.
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This 1955 military spec Sylvania 6SN7WGTA has a short bottle, early black plates, an extra support rod, and a nice chrome dome. The green print on the brown base reads "JAN-CHS-6SN7WGTA." Tube tests as new with balanced sections and low noise.
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The 1960s Tung-Sol 6SN7GTB tubes in this precisely matched pair have medium bottles, black plates, and halo getters. The black bases have white print with the Tung-Sol logo. Both tubes test as new with balanced sections and low noise.
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This 1957 Tung-Sol 6SN7GTB tube has has a tall bottle, black plates, and a horseshoe getter. The black base has white print with the Zenith logo. Tube tests as new with very low noise.
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This 1963 Westinghouse 6SN7GTB tube has a disc getter and gray plates with copper grid posts. The yellow print on the base has the Westinghouse logo. Tube tests as new with balanced sections.
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