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6SN7 / ECC32 / 5692 / VT-231
This RCA 5692 is an industrial grade 6SN7 tube--and an audiophile favorite. It has a short bottle, red base with white lettering, and dual top getters. This tube's triple mica and 5 extra support rods contribute to its long life and low noise.
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The 5692 tubes in this premium matched pair were made by Sylvania and labeled for RCA. They have black plates, medium bottles, and disc getters. Their black bases have red print and matching date codes. Both tubes test as new in box with very low noise.
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The electro-harmonix 6SN7EH tubes in this premium matched pair are new production tubes made in Russia. They have gray plates, 4 support posts, halo getters, brown bases, and gold pins. Both tubes test as new and are a solid matched pair.
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This RCA VT-231 is a military spec 6SN7GT. It has a medium bottle with gray glass, staggered black plates, and full black base with white print. Tube tests good.
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Price: Starting at $60.00
This Sylvania VT-231 is a military spec 6SN7GT tube. It has a medium bottle, bottom getter, and a full black base. The black t-plates have 2 rivets and are closely matched. This tube is from the 1949-1953 "Bad Boy" era of Sylvania 6SN7 production.
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The Sylvania VT-231 tubes in this rare premium matched pair are military spec 6SN7GT type tubes from the 1949-53 "Bad Boy" era of Sylvania 6SN7 production. They have medium bottles, bottom getters, and black t-plates with 2 rivets. Both tubes test as new.
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The mid 1950s CBS Hytron 6SN7GT tubes in this premium matched pair have medium bottles with bottom D getters, black t-plates, and full black bases with white print. Both tubes test as new and are matched to within 5% for transconductance (Gm).
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This National Union 6SN7GT was manufactured in 1950. It has a medium bottle with black glass, staggered black plates and a full black base with white print. Tube tests good with matched plates and very low noise.
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Price: Starting at $15.00
This RCA 6SN7GT has a medium bottle with gray glass, staggered black plates, and a full black base with silver print. Choose from tubes that test as new, good, or bargain.
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This RCA 6SN7GT was manufactured in the late 1940s and has the old RCA Victor logo on the base. It has a medium bottle with gray glass, staggered black plates, and full black base with white print. Tube tests good.
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The RCA 6SN7GT tubes in this premium matched pair have medium bottles with clear glass, staggered black plates, and full black bases with silver print. Both tubes test as new and are closely matched.
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Price: Starting at $19.00
This RCA 6SN7GT tube has a medium bottle with clear glass, staggered black plates, and a full black base with silver print. Choose from tubes that test as new, good, or bargains.
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This RCA made 6SN7GT was manufactured in 1952 and labeled for Silvertone. It has a medium bottle, full black base, black glass, and staggered black plates. Tube tests good and is low noise.
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Price: Starting at $18.00
This 6SN7GT tube was manufactured by RCA in the early 1940s. It has a medium bottle, staggered black plates, and full black base with silver label. Choose from tubes that test as new, good, or bargain.
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Price: Starting at $45.00
This Sylvania 6SN7GT dual triode preamp tube has a medium bottle, bottom getter, and full black base with green print. The old style black plates have 2 rivets. Choose from tubes that test as premium new (matched plates) or new.
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These Sylvania 6SN7GT dual triode preamp tubes have medium bottles, bottom getters, and full black bases. The old style black plates have 2 rivets. Both tubes test as new and are sold as a matched pair.
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Price: Starting at $21.00
This Tung-Sol 6SN7GT dual triode preamp tube has distinctive "mouse ear" micas. It also has a gray plates and bottom getter. Choose from tubes that test as new, good, or bargain.
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The mid-1950s Tung-Sol 6SN7GT tubes in this premium matched pair have gray t-plates and bottom getters. Both tubes test as new with very low noise. They are matched to within 2% for transconductance (Gm) and within 9% for emissions (mA).
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Price: Starting at $174.00
This Tung-Sol 6SN7GT tube is one of the most renowned 6SN7s ever made. It was manufactured in 1940s and has a medium bottle with black glass, round black plates, and a full black base.
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This Tung-Sol 6SN7GT was manufactured in 1960. It has a medium bottle, staggered black plates, bottom getter, and a full black base.
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These rare AWV (Amalgamated Wireless Valve Co.) 6SN7GTA tubes were made in Australia. They have medium bottles, black plates, and a bottom getter. They test as new and come in their original boxes.
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Price: Starting at $22.00
This GE 6SN7GTA dual triode preamplifier tube has a medium bottle and side getter. Choose from tubes that test as new or good.
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The GE 6SN7GTA tubes in this premium matched pair have short bottles, black plates, copper grid posts, and side getters. Their black bases have matching 1951 date codes. They are slightly microphonic when tapped, but test as new and are precisely matched.
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This 6SN7GTA by RCA has a medium bottle, black plates, and the rare dual side getters.
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This 1950s Sylvania 6SN7GTA dual triode preamplifier tube has a medium bottle with clear glass, triangular black plates, and a top getter with lots of chrome flashing. The full black base has green print. Tube tests as premium new.
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The 1940s Sylvania 6SN7GTA tubes in this premium matched pair have short bottles, triangular black plates, and top getters with lots of chrome flashing. The full black bases have green print. Tubes test new and are very precisely matched.
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This 6SN7GTA tube was made by Sylvania and labeled for other companies. It has a short bottle, full base, black triangle plates, and heavy chrome flashing. Among the earliest chrome dome types! Tube tests as new.
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The 1955 6SN7GTA tubes in this premium matched pair were made by Sylvania and labeled for Philco. They have tall bottles, triangular black plates, and top getters with lots of chrome flashing. Tubes test new and are very precisely matched.
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This 6SN7GTA was manufactued by Sylvania and labeled for other companies. It has a short bottle, top getter with lots of chrome flashing, and full black base with yellow print. The black t-plates have 3 rivets. Tube tests as new.
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Price: Starting at $18.00
This 6SN7GTB by Raytheon has a medium bottle, top halo getter, and black plates. The black octal base has yellow printing.
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TC Tubes specializes in precision testing and matching of vintage and new production vacuum tubes for guitar players, DIY tube audio enthusiasts, and audiophiles.
We also offer high quality and hard to find parts for DIY tube amplifier projects.
Our website features secure payment options and fast, convenient shipping around the world.
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