Can a housefly make a board bounce? Supersensitive electron tube by RCA

Description: RCA advertisement promoting RCA Laboratories and electronic transducers. Sourced from the National Geographic magazine Vol. 95, No. 1.
Document type:
Author: Radio Corporation of America
Language: English
Publisher: National Geographic Magazine
Place of production: Washington, D. C., United States
Date: 1949-07
Dimensions: height 25.4, width 17.4
NAC: 2008.1877