Eimac 4PR400A Pulse Tube, Made in USA Price not negotiable This item was stored by my father, who enjoyed amateur radio in his lifetime. It is believed to have been obtained from the United States in the 70s or 80s. Please judge the condition of the product from the photos. It is old, so there is overall soiling. If you need more photos, please comment. ⚠️Since the operation has not been tested, it is unknown whether it works properly. Please consider it as a junk item. Recommended for those looking for parts. Please understand that there will be no claims or returns even if it does not work. Please purchase only if you understand the above, as it is stored at home. ↓ Also, electrical materials and tools are on sale #bonElectricalMaterialsToolsSummary #AmateurRadio #Eimac #ElectronTube #VacuumTube #VacuumTubeAmplifier #ElectricalMaterials #Eimac #TransmittingTube #JunkItem #OperationNotConfirmed #Retro