Most of the photos on this site were extracted from reference images (high-resolution tiffs, 20 to 200 megabytes in size) from the Library of Congress research archive. (To query the database click here.) Many were digitized by LOC contractors using a Sinar studio back. They are adjusted by your webmaster for contrast and color in Photoshop before being downsized and turned into the jpegs you see here.
Vintage photos of:
This colorized image shows Mary Texanna Loomis, the first woman in the U.S. to run a radio school, operating her radio station in 1921. Her school, the Loomis Radio College, operated in Washington, D.C., in the 1920's and 1930's. She is seated at an early receiver that uses a panel mounted crystal detector. The knife switches to the right are probably antenna selectors. Next to that is an antenna tuner called a "loose coupler", which is connected to a tube receiver out of view on the right.
I optimized the image in Photoshop and colorized it using AKVIS Coloriage software. The original black and white photo is in the Library of Congress collection and can be seen at http://www.loc.gov/pictures/item/97504677/. View full size.