Tung-Sol

6D6 JAN

12.00 USD

Fine variable-mu RF or IF pentode amplifier tubes manufactured for the Armed Forces in the United States by Tung-Sol. These tubes, electrical equivalent to VT-69, 6U7 and 58, come with 6 pin bases, top cap and bottom getters. They are glass etched 6D6 and printed on base JAN-CTL-6D6 VT-69 TUNG-SOL MADE IN U.S.A. Boxes are standard military beige under contract NXSR-92645P dated 1945. Some tubes are also marked NATIONAL UNION made by SUBMARINE SIGNAL CO. Photo is typical of available stock.

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.