National Union

1V / 6Z3 / CV1999 JAN

12.00 USD

Fine half wave rectifier tubes manufactured for the Armed Forces in the United States by National Union. These tough 4 pin glass shoulder type tubes, designed for AC/DC and automobile radio receivers, come glass etched 1-V EM, and printed in white on base with NU logo, NATIONAL UNION MADE IN U.S.A. JAN-CNU-1V. Boxes are standard military beige printed U.S. ARMY – U.S. NAVY TUBE JAN CNU 1V STOCK #2J1V ACCEPTED 1945 and NATO coded 5960-188-8619 and 5960 557 6901.

Condition

New Old Stock (New in box)

	Tube Matching 6.00 USD by tube
LEARN MORE 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.