12SX7GT JAN BLACK PLATE

44.00 USD

Top of the line rugged double triode Mil. Spec. tubes manufactured in the United States by renowned RCA. These fine 8 pin octal based glass tubes, designed for amplifier or oscillator service in military equipment, come with black plates and bottom getters. They are printed in white with old style RCA and military logos JAN CRC-12SX7-GT MADE IN U.S.A. with 1950’s production codes. Available in singles or pairs - price is for one tube.

Condition

New Bulk
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.