Mullard vacuum tubes

CV4015 / M8161 / EF92

18.00 USD

Top of the line pentode amplifier tubes manufactured for the Armed Forces by Mullard in England. These high frequency 7 pin miniature glass amplifiers (up to 160 Mc/s), have silver plates and top D getters. They are printed in white with Mullard logo, M8161 MADE IN GT. BRITAIN. Some are printed on reverse with War Office arrow and 2 letter variable code, 6065 CV4015, and KB/D (Mitcham) or KB/DC (Whyteleafe) factory; we believe 1960's production. Price is for one tube, singles and pairs available.

Condition

New Bulk

	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.