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CV287 / QS150/15 / 150B3
  • CV287 / QS150/15 / 150B3
  • CV287 / QS150/15 / 150B3
English Electric

CV287 / QS150/15 / 150B3

14.00 USD
6.00 USD Save 8.00 USD

British voltage stabiliser tubes, striking at 170 volts; voltage is regulated plus or minus 5 volts, between 2 and 10 mA current. These pristine reliable 7-pin miniature tubes, manufactured for the British military, are the military equivalent of civilian QS150/15, or 150B3. With top halo getter, silvered metal paltes, and black phenolic pin protectors, these tubes are printed in white CV287 KB/QG, War Office arrow 7529 (indicating 1975 production), English Electric logo, ENGLISH ELECTRIC VALVE CO. LTD. MADE IN ENGLAND. Boxes are standard green, black, and yellow, with added label CV287 QS150/15 MADE IN UK.

Condition

Tube Matching
Tube Matching
6.00 USD by tube

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.
Quantity

English Electric
195 Items

Data sheet

Base
7 pin miniature B7G
Boite type
4/2
Emplacement
48
Quide
3800
Fonction
Voltage regulator