Penta Laboratories


44.00 USD

Fine 6SN7GT amplifier tubes manufactured by renowned Penta Laboratories. These excellent 8 pin octal based double triode tubes come with gray plates, bottom getters, and sturdy internal construction. They are printed in yellow with Pentalabs logo, 6SN7GT PENTA LABORATORIES, NEWBURY PARK, CA, USA with various production codes. Boxes are standard Penta Labs yellow and black printed 6SN7GT.


Tube Matching
Tube Matching
6.00 USD by tube


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.


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.


20 Items

Data sheet

8 pin Octal
Boite type
Double Triode
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