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  • -6.00 USD
EC81 / 6R4 GOLD PIN
  • EC81 / 6R4 GOLD PIN
  • EC81 / 6R4 GOLD PIN
Philips

EC81 / 6R4 GOLD PIN

17.00 USD
11.00 USD Save 6.00 USD

 Fine gold pin miniature glass triodes, manufactured in Holland by world renowned Philips. These excellent quality 9 pin tubes are designed as oscillator triodes at UHF frequencies up to 750 MHz, and come with double mica discs, gray plates and top halo getters. They are printed in white PHILIPS EC81 MADE IN HOLLAND.

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
Last items in stock

Philips
1 Items

Data sheet

Base
9 pin miniature Noval B9A
Boite type
2/2
Emplacement
40
Quide
2870
Fonction
Triode
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