12AU7 / 5814A JAN
  • 12AU7 / 5814A JAN
  • 12AU7 / 5814A JAN
Sylvania

12AU7 / 5814A JAN

28.00 USD

Quality mil. spec. double triode tubes manufactured for the armed forces in the United States by Sylvania. Tough 9 pin miniature glass preamp tubes with long gray ribbed plates, top halo getters, and two thick mica spacers. They are printed in green JAN 5814A SYLVANIA U.S.A. 34167 and 1970's date codes. They are also glass-etched 5814A U.S.A.

Condition

Tube Matching
Tube Matching
6.00 USD by tube

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.

Quantity

Sylvania
62 Items

Data sheet

Base
9 pin miniature Noval B9A
Boite type
3/12
Emplacement
SS
Quide
1742
Fonction
Double triode
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