5894 / QQE06/40 GOLD PIN

40.00 USD

24.00 USD Save 16.00 USD

High quality US manufactured gold pin double tetrodes by Philips; standard European tube for medium power VHF transmitters in the 1960’s. These thick glass envelope tubes have 7 pins in base and 2 plates (anodes) on top. They may be used as RF Class C amplifiers and oscillators (2 sections in push-pull), or Class C amplifiers with anode and screen-grid modulation. For NOS tubes, corrugated cardboard and thin paper roll complete packaging in standard yellow Philips boxes.

Condition

New Bulk
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.