CV3928 / 5636

14.00 USD

8.00 USD Save 6.00 USD

Amazing sub-miniature glass dual-control pentodes with long leads manufactured by Mullard at famous Mitcham plant in England. These tubes are designed for use over a range of frequencies from audio to VHF. They are diverse enough to accomplish the tasks of modulators, converters, mixers, audio, IF or AF amplifiers. Tubes are identified in white CV3928/5636 7228 KB/D, indicating 1972 production.

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.