Philips

12AT7WC

24.00 USD

Mil. Spec. 1987 production quality miniature glass tubes manufactured in the United States by Philips. Rugged double triode 9 pin tubes with top halo getters, gray plates and 4 stout copper posts. They are printed in blue JAN 12AT7WC PHILIPS ECG U.S.A. and coded 34167 8739 AHM. White military boxes are NATO coded 5960-00-179-4446 FSCM 82219 MFR/PN JAN 12AT7WC, under contract DLA900-87-C-0700 with bar code label.

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.