National Union

6AG5 JAN SILVER PLATE

8.00 USD

Top of the line miniature glass pentode tubes manufactured for the Armed Forces in USA by renowned National Union. These 7 pin high tansconductance tubes may be used as RF amplifiers up to 400 Mc/s. They come with top getters, and printed in white NATIONAL UNION 6AG5 MADE IN U.S.A. They are 1942 to 1945 production and also glass etched 6AG5. Boxes are standard military beige printed JAN-6AG5 with various order numbers.

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

National Union
60 Items

Data sheet

Base
7 pin miniature B7G
Boite type
1/2
Emplacement
35
Fonction
Pentode
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