30A5 / HL94 GRAY PLATE
  • 30A5 / HL94 GRAY PLATE
  • 30A5 / HL94 GRAY PLATE
Hitachi

30A5 / HL94 GRAY PLATE

18.00 USD

Quality output pentode tubes manufactured in Japan by Hitachi. These fine 7 pin miniature glass tubes, capable of 7.5 watts output with low plates voltages, have long gray plates and top halo getters. They are printed in white JAPAN 6I and glass etched 30A5. Boxes are standard Westinghouse blue printed 30A5 HL94.

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

Hitachi
16 Items

Data sheet

Base
7 pin miniature B7G
Boite type
1/1
Emplacement
44
Fonction
Pentode
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