R-Z


Radio Products triode


Raytheon A


Raytheon B


Raytheon BA


Raytheon BA (bakelite)


Raytheon BH


Raytheon BH (bakelite)


Raytheon BR


Raytheon LA


Raytheon R


Sonatron MU-X 30


Soverign AC


Speed 291


Speed 293


Speed 295


Strong WD-12


Supertheon rectifier


Supertron 171


Sylvania SY-171C


Sylvania 29


Televocal TC-201A


Tigerman Detecto-Amplifier


Unknown 201-A


Unknown triode


Van Horne 5V-A


Van Horne 5-VC


Volutron A


Welsh WT501


Wireless AC


WLS 2950


WLS 2951


WLS 2968


WLS 2976


WLS 2977


WLS 4600


WLS 4602


WLS 4611


WLS 4621


WLS 4630


WLS 4631

  point left

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