Marked: "RCA Radiola 18 / Reg. U.S. Pat. Off. / See License Notice on Bottom." Specimen is a six tube (plus rectifier) TRF receiver employing the following tube complement: 1st RF: UX226; 2nd RF: ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This prototype receiver was made by ...