Sylvania

5931 / 5U4WG 3 MICA JAN

97.00 USD

Rugged Mil. Spec. full-wave rectifer tubes manufactured for the Armed Forces in the United States by Sylvania. These beautiful triple mica thick glass brown-based tubes, resistant to shock and vibration, come with 8 pin octal bases, long black plates and top getters. They are glass-etched 5931 with different 3 letter and digit codes, and printed on the base in green JAN-CHS-5931 MADE IN U.S.A. SYLVANIA. Boxes are standard military beige NATO coded 5960-261-8673, under contract no. AF 33 (604) 18030 or 36175-PH-57-57 (31), and printed JAN-CHS-5931. Photo is typical of available inventory.

Condition

New Bulk
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.