General Electric (GE)

5814 / 12AU7 3 MICA JAN

43.00 USD

Top of the line tough double triode tubes manufactured in the United States/Canada by General Electric, with 1950 or 1960 production dates. These miniature glass 9 pin amplifier tubes will sound great for a long time in your sound system, and come with gray plates, triple mica supports, and top getters. They are printed in white with GE logo, 5814A/WA MADE IN U.S.A. and are glass etched 5814A with dot codes. Some are also printed in red MADE FOR CANADIAN MARCONI COMPANY.

Condition

New Bulk
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.