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What’s new
- NOW AVAILABLE
The new old stock St. Petersburg 6550B power tube is the predecessor to the new production SED "Winged C" 6550C tube. Same great quality at a great value!
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The Type I Ei KT90 power tubes in this precision matched quad were made in the former Yugoslavia. They have welded gray plates and dual O getters. Type I KT90 tubes can be used as substitutes for 6550 / KT88 tubes in amps that have enough bias range.
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The GE 6L6GC power tubes in this premium matched pair have gray plates, dual side getters, and black bases. They also have matching date codes and the 188-5 factory code (Owensboro, Ky). Tubes test as new and are precisely matched.
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This new old stock 6550B power tube is the predecessor to the highly regarded current production SED Winged C 6550C tube made in St. Petersburg, Russia. Same great quality at a much lower price! Price includes extended burn-in and precision matching.
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The 1960 GE 5692 tubes in this precisely matched pair are premium quality 6SN7 tubes. They have short bottles, dual top getters, and brown bases. Both tubes test as new with very low noise. They are matched for both current draw (mA) and Gm.
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The Brimar 12AU7 / ECC82 tubes in this precisely matched pair were made in Great Britain. The white labels have the Mullard IEC logo. Both tubes test as new with balanced sections and very low noise. They are matched for both current draw (mA) and Gm.
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The 1970s GE 6FQ7 / 6CG7 tubes in this precisely matched quad have halo getters and gray plates with copper grid posts. The white labels have the GE logo. All 4 tubes test as new and are matched for both mA and Gm.
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Price: From $44.00 to $49.00
This 1960s Brimar 12AT7 / ECC81 tube has black wing style plates with copper grid posts and a halo getter. The white print on the glass has the Knight logo and says "Great Britain." Click "more info" for current availability.
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Price: From $174.00 to $189.00
The Mullard 12AX7 / ECC83 tubes in this precisely matched pair were made in Great Britain (I63 series). They are labeled for other companies and Mullard's Blackburn, UK factory codes are etched in the glass. Click "more info" for current availability.
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Price: From $104.00 to $112.00
This 1955-56 military spec RCA 12AX7 tube has long black plates and a D getter. The white label on the glass reads "JRC-12AX7." These RCA black plates are getting hard to find--grab one while supplies last! Click "more info" for current availability.
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The 1970s RCA 6V6GTA tubes in this precisely matched pair have gray plates and bottom O getters. The red print on the bases has the RCA logo. Both tubes test as new and are matched for both current draw (mA) and transconductance (Gm).
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Price: From $129.00 to $294.00
The rare 1940s RCA VT-231 tubes in this precisely matched pair are military spec 6SN7GT type tubes. They have gray glass and staggered black plates. The silver print on the bases reads "JAN CRC-6SN7-GT VT-231." Click "more info" for current availability.
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The 1962 Telefunken 12AU7 / ECC82 tubes in this precisely matched pair have smooth plates and halo getters. The white print on the glass is labeled for Artisan and says "Made in Western Germany." The diamond imprint is stamped in the tube bases.
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This 1962-63 military spec Tung-Sol 6X4W rectifier tube has black "X" style plates and a curved D getter. The white print has the Tung-Sol logo and reads "JTL-6X4W" or "6X4W." Tube tests as new.
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The 1970s RCA 7025 tubes in this precisely matched pair are low noise 12AX7 / ECC83 tube types. They have short gray plates and halo getters. The red labels have the RCA logo and say made in Mexico. Both tubes test as new with high gain and low noise.
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Price: From $144.00 to $319.00
The 1960s Amperex 7308 tubes in this precisely matched pair are premium quality 6DJ8 / ECC88 tubes (VR5 series). They have gold pins, gray risers, and large O getters. Both tubes test as new with phono grade sound quality. Click "more info" for details.
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TC Tubes specializes in precision testing and matching of vintage and new production vacuum tubes for guitar & bass players, audiophiles, and DIY tube audio enthusiasts. Our website features secure payment options and fast, convenient shipping around the world.
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