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RCA 5751 / 12AX7 - black plates, triple mica, matched pair
RCA 5751 / 12AX7 - black plates, triple mica, matched pair
Price: $179.00
RCA 5751 / 12AX7 - black plates, triple mica, matched pair
The 1955 RCA 5751 tubes in this precisely matched pair are a lower gain 12AX7 tube type. They have black plates and triple micas. The white labels on the glass have the RCA logo. Both tubes test as new with balanced sections and low noise.
Amperex PQ 6085 - gold pins, matched pair
Amperex PQ 6085 / E80CC - gold pins, matched pair
Price: $149.00
Amperex PQ 6085 / E80CC - gold pins, matched pair
The 1976 Amperex 6085 tubes in this precisely matched pair have gray plates with copper grid posts and gold pins. They have orange PQ labels and the Heerlen, Holland factory codes are etched in the glass. Both tubes test as new and are precisely matched.
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.
Sylvania 8417 - matched quad
Sylvania 8417 - matched quad
Price: $324.00
Sylvania 8417 - matched quad
The 1970s Sylvania 8417 power tubes in this precisely matched quad have top and side getters. The yellow print on the glass has the PhilipsECG logo (partial). All four tubes test as new and are matched for current draw (98.8-100.8 mA) and Gm (99-100%).
RCA 5693 / 6SJ7 - red bottle
RCA 5693 / 6SJ7 - red bottle
Price: $44.00
RCA 5693 / 6SJ7 - red bottle
This 1960 RCA 5693 tube is a premium quality 6SJ7 tube—and a favorite for vintage guitar amps. The white print on the distinctive red metal bottle has the GE logo. Tube tests as new with low noise.
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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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