General Electric

12HE7 GRAY PLATE

16.00 USD

Top quality two section diode pentode glass tubes manufactured by General Electric in the United States. These fine 12 pin compactron based tubes, designed for TV receiver service as damper diode and beam power amplifier pentode, come with gray plates and side getters. They are glass etched 12HE7 U.S.A. with various dot codes, and printed in white with GE logo, COMPACTRON, with various production codes. Boxes are standard GE orange and gray printed COMPACTRON 12HE7.

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

General Electric
10 Items

Data sheet

Base
12 pin Compactron Duodecar
Boite type
1/1
Emplacement
16
Fonction
Diode pentode
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