RCA vacuum tubes

9001 JAN

11.00 USD

Rugged Mil. Spec. double triode glass tubes manufactured for the Armed Forces in the United States by RCA. These 7 pin miniature tubes come with black plates, and are glass etched 9001. They are also printed in white with old style RCA logo, JRC-9001 MADE IN U.S.A. Boxes are standard military beige or RCA red and black printed 9001. Photo is typical of available stock.

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

12 Items

Data sheet

Base
7 pin miniature B7G
Boite type
1/1
Emplacement
48
Quide
296
Fonction
Pentode
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