1635 JAN

12.00 USD

Rugged Mil. spec. 8 pin glass octal based tubes manufactured for the Armed Forces in the United States by RCA. These fine power output tubes come with gray or black plates and bottom getters. They are glass etched 1635, and printed on base with old style RCA logo, either JAN CRC 1635 or U.S.N. CRC 1635. Boxes are standard military beige, some NATO coded 5960-188-3901, others JAN CRC 1635, with variable production dates of 1940’s or 1950’s.

Condition

New Old Stock (New in box)
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.