Sylvania

6922 / E88CC JAN

52.00 USD

 Best quality on the market mil. spec. audio amplifier tubes manufactured for the Armed Forces in the United States by Sylvania. These beautiful 9 pin miniature glass double triode tubes have gray plates and top round getters. They are printed in green JAN 6922 SYLVANIA MADE IN U.S.A. and they are glass etched 6922 U.S.A. Standard white military boxes bear NATO code 5960-00-67-9016 with 1960's or 1970's date codes.

Condition

Tube Matching
Tube Matching
6.00 USD by tube

WHY ?

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.

HOW ?

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.

Quantity
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Sylvania
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Data sheet

Base
9 pin miniature Noval B9A
Boite type
1/1
Emplacement
47
Quide
352
Fonction
Double triode
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