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  • -6.00 USD
CV284 / QS75/20 / 75B1
  • CV284 / QS75/20 / 75B1
  • CV284 / QS75/20 / 75B1
English Electric

CV284 / QS75/20 / 75B1

12.00 USD
6.00 USD Save 6.00 USD

Fine 7-pin minature glass voltage stabiliser tubes manufactured for British military by renowned English Electric Company. These tubes strike at 110 volts, and will maintain a useful voltage of 75 volts plus or minus 5 volts, at from 2 – 20 mA current. Tubes come with black phenolic pin protector, are smoked, and printed in white QS75/20 CV284 KB/QG, War Department arrow-head 7901, and ENGLISH ELECTRIC VALVE CO. LTD. MADE IN ENGLAND. Boxed in standard green, black and yellow boxes with address Chelmsford Essex CM1 2QU. White sticker on box printed QS75/20 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
110 Items

Data sheet

Base
7 pin miniature B7G
Boite type
1/1
Emplacement
49
Quide
1430
Fonction
Voltage regulator