Various

EL84 / 6BQ5 TOP GETTER

55.00 USD

Fine miniature glass audio pentode tubes manufactured in Russia by Mesa. These robust 9 pin tubes are designed for output service in hi-fi systems with an output in push-pull of up to 17 watts. They come with long gray plates and top getters. They are printed MESA ENGINEERING 6BQ5 EL84, and come in plain boxes printed 6BQ5 EL84.

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

Various
10 Items

Data sheet

Base
9 pin miniature Noval B9A
Boite type
1/2
Emplacement
35
Fonction
Pentode
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