General Electric (GE)

12BY7A MATCH PAIR TEKTRONIX

29.00 USD

Top of the line pentode amplifier tubes manufactured and tested in the United States at the Owensboro Kentucky plant of General Electric, then tested and paired by electronics giant Tektronix. These fine miniature glass 9 pin tubes have black plates and top halo getters, and have individual labels with paired serial numbers. Boxes are standard Tektronix printed PART NO. 157-0053-00 SELECTED PR. 9M12BY7. Price is for pair of tubes, sold only in pairs.

Condition

New Bulk
New Old Stock (New in box)
Used Tested

	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.