• New

7193 JAN / 2C22

18.00 USD

Tough Mil. Spec. triode amplifier tubes manufactured for the Armed Forces in the United States by renowned Ken-Rad. These tubes have 2 top caps for grid and anode, and standard 8 pin octal bases. They have black plates and bottom getters, are printed in white KEN-RAD MADE IN U.S.A. 7193 and coded C3.Some are boxed Hazeltine Service Corp. and some are boxed Zenith, all standard military beige boxes printed 7193.


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.


12 Items

Data sheet

8 pin Octal
Boite type
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