Northland Antique Radio Club
- http://www.geocities.com/TelevisionCity/4544/index.html
- Non-profit organization dedicated to preserve the history of radios and related items. Includes information about activities, a calendar of events, a directory of members online, a newsletter and membership application. Located in Minneapolis, Minnesota, USA.
The James Millen Society
- http://www.qsl.net/jms/
- Formed for enthusiasts who have an interest in this pioneer and the equipment he was responsible for building. Includes a history of the group, a biography, pictures, schematics, a membership roster and application.
The Xtal Set Society
- http://www.midnightscience.com/
- Founded in 1991. Publishes a newsletter, and several books about crystal radio. Crystal set projects, tips for crystal radio design, and crystal radio history.