RCA vacuum tubes

6197 3 MICA

13.00 USD

Top quality power pentode tubes manufactured in the United States by renowned RCA. These fine miniature glass 9 pin tubes, designed for computer applications with 7.5 watts plate dissipation, come with long gray plates, top getters, and 3 mica spacers. They are printed in red, some old style and some new style RCA logo, RCA ELECTRON TUBE, with 1960 or 1970 production codes. They are also glass etched 6197 U.S.A. Boxes are old or new style RCA red and black printed 6197. 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

RCA vacuum tubes
16 Items

Data sheet

Base
9 pin miniature Noval B9A
Boite type
1/2
Emplacement
46
Quide
675
Fonction
Pentode

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