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12SG7
  • 12SG7
  • 12SG7
Radio Corporation of America

12SG7

9.00 USD
5.00 USD Save 4.00 USD

Finest octal-based metal tubes manufactured in USA by renowned RCA.These semi remote cut-off pentode tubes feature low grid-plate capacitance and high mutual conductance (GM), with a dual cathode connection at pins 3 and 5. NOS tubes bear modern RCA logo in red, are coded EH, stamped 12SG7 5C U.S.A. on metal base, and boxed in late version red RCA boxes. New Bulk tubes are with old style logo as photo.

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

148 Items

Data sheet

Base
8 pin Octal
Boite type
4/7
Emplacement
19
Quide
1943
Fonction
Pentode
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