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GE 6550 / 6550A - welded plates, matched pair
GE 6550 / 6550A - welded plates, matched pair
Price: $179.00
GE 6550 / 6550A - welded plates, matched pair
The late 1970s GE 6550A power tubes in this precision matched pair have gray plates, 3 getters, metal collar bases, and 188-5 factory code (Owensboro, Ky). Tubes matched for both current draw (43.4 mA & 44.4 mA) and transconductance (5800 & 5800 Gm).
Hickok TV-7/U Military Tube Tester
Hickok TV-7/U Military Tube Tester
Price: $599.00
Hickok TV-7/U Military Tube Tester
This Hickok TV-7 military tube tester is calibrated and in good cosmetic condition. The name plate is missing but the meter is labeled for a TV-7/U. The TV-7 tester is an excellent vintage tester with great supplemental data and support on-line.
SED
Svetlana / SED "Winged C" 6550C - matched quad
Price: $279.00
Svetlana / SED "Winged C" 6550C - matched quad
The 1998 Svetlana 6550C tubes in this matched quad (4) were made in St. Petersburg, Russia. The etched print on the glass has the Svetlana logo and OTK factory mark. All four tubes are matched for current draw (63.6-65.4 mA) and Gm (7000-7200) Gm.
Sylvania 6550 - welded plates
Sylvania 6550 - matched pair
Price: $189.00
Sylvania 6550 - matched pair
The 1970s Sylvania 6550 power tubes in this matched pair have welded gray plates, 3 getters, and metal collar bases. The blue or green print on the glass has the PhilipsECG. Click "more info" for test restuls.
Amperex 6DJ8 / ECC88 - matched pair
Amperex 6DJ8 / ECC88 - white HP label, phono grade, matched pair
Price: $129.00
Amperex 6DJ8 / ECC88 - white HP label, phono grade, matched pair
The 1965 Amperex 6DJ8 / ECC88 tubes in this precisely matched pair have halo getters and silver risers. The white print has the HP logo and the Heerlen, Holland factory code is etched in the glass. Both tubes test as new with phono grade noise levels.
Bendix 5992 / 6V6GTA - brown base
Bendix 5992 / 6V6GTA - brown base
Price: $92.00
Bendix 5992 / 6V6GTA - brown base
This 1950s military spec Bendix 5992 tube is a ruggedized 6V6GT tube type. It has black plates, triple micas with support rods, and dual D getters. The brown base has red print with the National logo. Tube tests as new.
Cunningham 5Y3GT - black plates
Cunningham 5Y3GT - black plates
Price: $44.00
Cunningham 5Y3GT - black plates
This rare 1950 Cunningham 5Y3GT rectifier tube has smooth black plates and bottom D getters. The silver print on the glass has the Cunningham logo. Tube tests as new.
Russian 6Π14Π-EB / 6P14P-EV / 6BQ5 - matched quad
Russian 6P14P-EV / 6Π14Π-EB / 6BQ5 - matched quad
Price: $129.00
Russian 6P14P-EV / 6Π14Π-EB / 6BQ5 - matched quad
The vintage Russian 6P14P-EV (6Π14Π-EB in Cyrillic script) tubes in this precisely matched quad are high-reliability EL84 / 6BQ5 type tubes. They have a higher maximum plate voltage and dissipation than standard 6BQ5 tubes. Tubes test as new.
Siemens 12AX7 / E83CC - matched pair, phono grade
Siemens 12AX7 / E83CC - matched pair, phono grade
Price: $224.00
Siemens 12AX7 / E83CC - matched pair, phono grade
The late 1960s Siemens E83CC tubes in this precisely matched pair are premium quality 12AX7 / ECC83 tubes. They have gray plates and halo getters. The white labels has the Siemens logo. Both tubes test as new with phono / V1 grade noise levels.
Tung-Sol 6SL7GT - black glass
Tung-Sol 6SL7GT - black glass
Price: $62.00
Tung-Sol 6SL7GT - black glass
This rare 1954 Tung-Sol 6SL7GT has round plates and black glass. The white print on the base has the Tung-Sol logo. Tube tests as new with balanced sections and low noise.
Sylvania 2A3 triode - matched quad
Sylvania 2A3 triode - matched quad
Price: $449.00
Sylvania 2A3 triode - matched quad
The 1940s Sylvania 2A3 tubes in this precisely matched pair have black plates and bottom getters. The green print on the bases has the early Sylvania leaf logo. Both tubes test as new and are matched for current draw (48.0-50.5 mA) & Gm (4880-5000).
ElectroHarmonix 6H30Pi - gold pins
ElectroHarmonix 6H30Pi - gold pins
Price: $33.00
ElectroHarmonix 6H30Pi - gold pins
The ElectroHarmonix 6H30Pi tube is a super linear, military spec dual triode tube made in Russia. It has the same internal construction as the Sovtek 6H30Pi, except the EH 6H30Pi has gold pins and has been selected for tighter tolerances and lower noise.
Visseaux 6K6GT - matched pair
Visseaux 6K6GT - matched pair
Price: $49.00
Visseaux 6K6GT - matched pair
The 1950s Visseaux 6K6GT tubes in this precisely matched pair have black plates, bottom getters, and engraved bases. The white print on the glass says "Made in France." Both tubes test as new.

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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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