12BZ6 NATO

16.00 USD

Top of the line high transconductance IF amplifier tubes manufactured in the United States for the Armed Forces by RCA. These 7 pin miniature glass tubes come with black plates and top halo getters. They are printed in red with RCA logo coded 68-22 indicating 1969 production. Thay are also glass etched 12BZ6 U.S.A. Boxes are standard military brown NATO coded 5960-925-6822 under contract no. DAAB05-69-M-8888 A-5/69.

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.