General Electric (GE)

6197 JAN BLACK PLATE

7.00 USD

Top quality miniature glass power amplifier tubes manufactured by General Electric in the United States. These tough mil. spec. 9 pin tubes have black plates, 4 stout copper posts, thick mica supports, and top getters. They are printed in green with GE logo, JAN-6197 MADE IN U.S.A. 86-29 87-04 33173, indicating 1986 production. Boxes are standard gray military printed with contact no. DLA900-85-0-0016-0030 A 10/86 JAN 6197 GENERAL ELECTRIC CO. and bar code with NATO identification 5960006809689.

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.