RCA vacuum tubes


119.00 USD

Best on the market twin triode glass amplifier tubes manufactured in the United States by renowned RCA. These exceptional glass 8 pin octal based tubes, replacements for 6SN7, designed for critical operations where 10,000 hour life and extreme uniformity are important, come with black plates and top round getters. They are glass etched 5692 U.S.A., printed in red with new style RCA logo, and coded 8543. Boxes are standard red RCA new style printed 5692.


Tube Matching
Tube Matching
6.00 USD by tube


A tube may have one, two, or three internal sections depending on the purpose of the tube; somtimes these sections are all the same, sometimes they are different. Due to manufacturing and material tolerances, there may be slight differences between the original specification and the actual tube. Tube matching tests each one of these internal sections and selects tubes, compared to original specifications at manufacture, for balanced performance and good sound.


All our tubes are tested by us prior to packing on our Stark, AVO, Simpson or RF Laboratories Inc. calibrated testers. On request for tube matching, tubes are matched for Mutual Conductance in Micromhos and Plate Current in Milliamps on our Amplitrex or Radioelec Duovac testers, with results printed for each  individual tube. Certain tubes difficult to test are matched for Mutual Conductance in Micromhos only on one of our regular calibrated testers. On request we can also test for Microphonics.


6 Items

Data sheet

8 pin Octal
Boite type
Double triode
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