CV118 / VR65
  • CV118 / VR65
  • CV118 / VR65
Ediswan

CV118 / VR65

9.00 USD

These tubes were originally designed for RF/IF stages for British ARMY and civil applictions, with 6.3 volts filaments and a mutual conductance of 8,500 GM, indirect heated at 0,65A. Mazda Octal base. These pentodes, made for the British Royal Air Force, have grey metallised coating and are stamped AG ARROW - CV118 KB/B indicating manufacture by Ediswan at Baldock factory prior to 1945. They come complete with corrugated cardboard rolls, grey coarse paper rolls, then brown military boxes stamped VALVE ELECTRONIC CV118 (A.M. REF. NO. 10CV/118) B. Other ref: 10E/11446 - CV1065 and more. This is one of the oldest vacuum tubes in dBtubes store.

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

Ediswan
77 Items

Data sheet

Base
8 pin Mazda Octal K8B
Boite type
2/5
Emplacement
30
Quide
2002
Fonction
Pentode
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