Mullard vacuum tubes

EF54 / VR136 METAL

18.00 USD

Tough RF pentode tubes manufactured in England by renowned Mullard. These amazing 9 pin B9G loctal based tubes, with mutual conductance of 7,700 micromhos, designed for radio frequency amplification in short wave radio receivers, come in silver metal case. They are printed in black with Mullard logo, EF54 MADE IN GREAT BRITAIN BVA (British Valve Association). Boxes are standard Mullard blue printed EF54.

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.