EF22
  • EF22
  • EF22
Philips

EF22

12.00 USD

Quality glass amplifier tubes manufactured in Holland by Philips. Thes fine 8 pin loctal based tubes, designed for RF and IF amplifier service in AC/DC equipment, come with silver mesh screen, top halo getters and chrome top. They are printed in white PHILIPS EF22, and boxed in standard Philips yellow, red and blue boxes printed EF22.

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

Philips
26 Items

Data sheet

Base
8 pin Loctal
Boite type
1/2
Emplacement
29
Quide
455
Fonction
Pentode
Comments (0)
No customer reviews for the moment.