Radio Corporation of America


9.00 USD

Top of the line twin pentode tubes manufactured in the United States by RCA. These fine glass 12 pin compactron based tubes, designed for IF amplifier service in TV receivers, come with gray plates, chrome tops and halo getters. They are glass-etched 6BN11 U.S.A. with dot codes, and printed in white with RCA logo, RCA RADIOTRON ELECTRON TUBE, with various production codes. Boxes are standard RCA red and black printed 6BN11.

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.


15 Items

Data sheet

12 pin Compactron Duodecar
Boite type
Twin pentode
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