Various manufacturer

6EC4 / EY500

9.00 USD

Amazing booster diode tubes made by different makers in various countries of origin. These fine glass 9 pin Compactron based tubes come with tough internal construction, long gray plates and top or side getters. Designed for TV receiver service with 6 volt heater, (similar to PY500 except for heater voltage), with cathode top cap, they can take up to 5600 volts. They are printed with various maker's markings, and come in standard manufacturer's boxes printed 6EC4/A / EY500.

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 manufacturer
23 Items

Data sheet

Base
9 pin Compactron Novar
Boite type
1/2
Emplacement
10
Quide
148
Fonction
Diode