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Top quality beam power pentode tubes manufactured in various countries by renowned General Electric. These fine 9 pin Compactron Novar based glass tubes come with long gray plates, top getters, and are designed for TV receiver service. They are printed with GE logo, ELECTRONIC TUBE MADE TO CGE SPECIFICATIONS 6GB5A. Boxes are standard GE orange printed 6GB5A.


Tube Matching
Tube Matching
$6.00 by tube


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.


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.


6GB5A (nos)
12 Items

Data sheet

9 pin Compactron Novar
Boite type
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