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Amperex 6AS7G - black plates
Amperex 6AS7G - black plates
Price: $59.00
Amperex 6AS7G - black plates
This rare Amperex 6AS7G has black plates and a dual bottom getters. The red print on the base has the Amperex logo and reads "Made in Holland." Tube tests as new with low noise.
Sylvania 6550 - welded plates
Sylvania 6550 - matched pair
Price: $214.00
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.
Amperex 6SN7GTB - Bugle Boy label
Amperex 6SN7GTB - Bugle Boy label
Price: $89.00
Amperex 6SN7GTB - Bugle Boy label
This very rare 1966 Amperex 6SN7GTB tube has a medium bottle, bottom D getter, and staggered black plates. The white print on the glass has the Amperex Bugle Boy label. Tube tests as new with very low noise.
Arcturus 12AX7 - black plates, phono grade
Arcturus 12AX7 - black plates, phono grade
Price: $79.00
Arcturus 12AX7 - black plates, phono grade
This rare 1950s Arcturus 12AX7 tube has short black plates with copper grid posts and a D getter. The white print on the glass has the Arcturus logo. This tube appears new in box but it tests at about 80% for Gm on both sections. Phono grade noise levels.
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.
RCA 6BQ5 / EL84 - matched pair
RCA 6BQ5 / EL84 - matched pair
Price: $97.00
RCA 6BQ5 / EL84 - matched pair
The RCA 6BQ5 / EL84 tubes in this precisely matched pair have smoked glass, gray plates, and halo getters. The red print on the glass has the RCA logo. Tubes are matched for both current draw (mA) and transconductance (Gm).
Sylvania 6BQ5 / EL84 - black plates, matched pair
Sylvania 6BQ5 / EL84 - black plates, matched pair
Price: $109.00
Sylvania 6BQ5 / EL84 - black plates, matched pair
The early Sylvania 6BQ5 / EL84 tubes in this precisely matched pair have black plates and halo getters. The red and yellow labels have the Sylvania logo (partial). Both tubes test as new and are matched for current draw (43.3 & 45.3 mA) and Gm (92% & 95%)
Telefunken 6DJ8 / ECC88 - diamond imprint
Telefunken 6DJ8 / ECC88 - diamond imprint
Price: $119.00
Telefunken 6DJ8 / ECC88 - diamond imprint
This 1965 Telefunken 6DJ8 / ECC88 tube was made in Berlin, West Germany. The white label has the Telefunken logo and the diamond imprint is in the glass between the pins. Tube tests as new with balanced sections and phono grade noise levels.
Tung-Sol 12AX7 - long black plates, phono grade
Tung-Sol 12AX7 - long black plates, phono grade
Price: $97.00
Tung-Sol 12AX7 - long black plates, phono grade
This very rare 1956 Tung-Sol 12AX7 has long black plates and a horseshoe getter. The white print on the glass has the Tung-Sol logo. Tube tests as new with balanced sections and phono/V1 grade noise levels.
RCA Command Series 5814A / 12AU7 - matched pair
RCA 5814A / 12AU7 - Command Series, matched pair
Price: $109.00
RCA 5814A / 12AU7 - Command Series, matched pair
The 1967-69 RCA 5814A / 12AU7 tubes in this precisely matched pair are labeled for the broadcast quality RCA Command Series. They have black plates and halo getters. Both tubes test as new and are matched for both current draw (mA) and Gm.
RCA 7868 - matched pair
RCA 7868 - matched pair
Price: $129.00
RCA 7868 - matched pair
The 1970s RCA 7868 tubes in this precisely matched pair have gray plates and top and side halo getters. Both tubes test as new and are matched for both current draw (52.0 & 52.6 mA) and transconductance (90% & 92% Gm).
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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