12AH7GT GEPRUFT
  • 12AH7GT GEPRUFT
  • 12AH7GT GEPRUFT
RCA vacuum tubes

12AH7GT GEPRUFT

6.00 USD

Pristine glass octal-based twin triodes manufactured in the United States by renowned RCA. These fine tubes, designed for converter and audio applications, have black plates and bottom D-getters. They are glass-etched 12AH7GT, and printed on black base RCA ELECTRON TUBE RADIOTRON MADE IN U.S.A. with old style RCA logo. For NOS tubes, boxes are old style red and black sealed at each end and overprinted GEPRUFT, indicating wartime Lend-Lease programme origin.

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

74 Items

Data sheet

Base
8 pin Octal
Boite type
3/1
Emplacement
16
Quide
1122
Fonction
Double triode
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