RCA vacuum tubes

5X4G JAN

33.00 USD

Top of the line Mil. Spec. full wave high vacuum rectifier tubes manufactured for the United States Air Force by RCA. These fine shoulder type 8 pin octal based glass tubes come with black plates and top D getters. They are printed with old style RCA logo, U.S.A.F. 5X4G MADE IN U.S.A. coded 61-04 indicating 1960’s production, and are glass etched 5X4G. Boxes are standard military beige NATO coded 5960-188-3946 under contract AF 33(604)30485, and printed MFD BY RCA DATE PKD. 11-60, SIMILAR TO CV1851.

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.