• New
Amperex vacuum tubes


89.00 USD

Best on the market miniature glass audio double triode tubes manufactured and tested in the United States by Amperex, then tested again and packaged by renowned electronic giant Tektronix. These beautiful 9 pin tubes, similar to 6922/E88CC except for filament voltage of 12.6 volts, come with gold pins, and are printed in orange PQ (Premier Quality) AMPEREX 8416 MADE IN U.S.A. Boxes are standard Tektronix printed with Tektronix logo, TUBE 9M 8416 PART NO. 154-0413-00.


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.


7 Items

Data sheet

9 pin miniature Noval B9A
Boite type
Double Triode
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