E180F / 6688 GOLD PIN
  • E180F / 6688 GOLD PIN
  • E180F / 6688 GOLD PIN
Philips

E180F / 6688 GOLD PIN

19.00 USD

 Top of the line miniature glass gold pin pentodes manufactured in Holland by renowned Philips. These amazing 9 pin tubes exhibit high mutual conductance, and are suitable for wide band amplifier service. They have short gray plates and top halo getters. Some are printed in white PHILIPS MINIWATT E180F 6688 SQ SPECIAL QUALITY, some are printed PHILIPS JAN-6688 with 7 digit variable codes. All are glass etched HOLLAND. Boxes are either standard Philips yellow, red , blue, or white, red. Some boxes are military beige NATO coded 5960-00-820-8717.

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
4 Items

Data sheet

Base
9 pin miniature Noval B9A
Boite type
1/2
Emplacement
47
Fonction
Pentode
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