Radio Corporation of America


55.00 USD

Top quality black plate power rectifer tubes manufactured in the United States/Canada by renowned RCA. These fine 8 pin octal based double diode tubes come with long black plates, and tough internal structure, and are printed in white with old style RCA logo, RCA ELECTRON TUBE, with codes such as PO XXMB. They are also glass etched 5Y3GT CANADA. Boxes are standard RCA red and black printed 5Y3GT. Photo is typical of available stock.


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.


17 Items

Data sheet

8 pin Octal
Boite type
Full-wave rectifier
Comments (0)
No customer reviews for the moment.