7056 BLACK PLATE
  • 7056 BLACK PLATE
  • 7056 BLACK PLATE
Motorola

7056 BLACK PLATE

7.00 USD

 High mutual conductance pentodes, similar to 6CB6, manufactured in the United States by Motorola. These miniature glass 7 pin tubes are designed for secure operation of mobile communications equipment. They come with black plates and top round getters, and they are glass etched 7056 U.S.A. with dot code. They are printed in red MOTOROLA and coded 81-04 188-5 indicating 1981 production by General Electric. Some tubes are printed with GE logo instead of MOTOROLA. Boxes are standard Motorola white, black and blue printed PART NO. 7056.

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

22 Items

Data sheet

Base
7 pin miniature B7G
Boite type
1/8
Emplacement
47
Quide
154
Fonction
Pentode
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