The 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 Raytheon VT-231 is a military spec 6SN7GT. It has black plates with copper grid posts and a bottom getter. The orange print on the base has the Raytheon logo and reads "JAN-CRP-6SN7GT VT-231." Tube tests as new with balanced sections.
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This rare 1954 RCA 6SN7GTA tube has a short bottle, dual side D getters, 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 1962 RCA 6SN7GTB tubes in this precisely matched pair have staggered black plates and bottom D getters. The orange print on the bases has the RCA logo. Both tubes test as new with balanced sections and low noise.
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The 1968 RCA 6SN7GTB tubes in this precisely matched pair have bottom D getters, and staggered black plates with a filament across the top mica. The narrow black bases have red print with the RCA logo. Both tubes test as new with balanced sections.
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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 early 1950s military spec Sylvania 6SN7WGT has a short bottle, early black plates, an extra support rod, and a nice chrome dome. The green or gold print on the brown base reads "JAN-CHS-6SN7WGT." Tube tests as new with low noise.
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This very rare 1940s military spec Tung-Sol 6SN7GT tube has black glass, round black plates with copper grid posts, and a round mica. The white print on the glass has the Mullard shield logo. Tube tests as new with balanced sections.
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This 1950s Westinghouse 6SN7GTB tube has a D getter and black plates with copper grid posts. The yellow print on the base has the Westinghouse logo (partial). Tube tests as new with balanced sections.
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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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