G.E.C. (Genalex)

CV138 / 6AM6

9.00 USD

Impossible to find Mil. Spec. miniature glass pentode tubes manufactured in England by General Electric G.E.C. These fine 7 pin RF and IF amplifier tubes come with silver plates, top getters, and are wrapped in corrugated cardboard and tissue paper rolls. They have stick on blue labels printed G.E.C. MADE IN ENGLAND and glass etched with British military War Office arrow printed CV138 6AM6 VK KB/Z. Boxes are standard blue and white G.E.C. printed CV138 6AM6.

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

G.E.C. (Genalex)
36 Items

Data sheet

Base
7 pin miniature B7G
Boite type
4/1
Emplacement
49
Fonction
Pentode