Lot of 1940s/1950s vintage RCA/Tung-Sol vacuum tube catalogs

Lot of two mid-century technical data catalogs for vacuum tubes. Important data for repairing and restoring vintage vacuum tube electronics, like radios and audio gear (amplifiers, pre-amps etc.). These are from the estate of an electrical engineer and short wave radio enthusiast.

There are: "Tung-Sol Vibration Tested Electron Tubes - Characteristic Chart - 14th edition" - 1948, 65 pages and "RCA Receiving Tube Manual - Technical Series RC-19" - 1959, 384 pages. These both have some wear and pen and pencil marking to the covers.

Item No. n728462