Delta Loop Antenna
- Complete plans to build Delta Loop antenna. Includes worksheet to calculate antenna lengths for multiple frequencies.
- http://www.omconcept.fr/delta-loop/uk-index.php

Van's Think Tank
- A collection of antenna links for shortwave, mediumwave and longwave.
- http://www.dobe.com/vea/vank6b.htm

Select-A-Tenna
- Manufactures an inductive loop AM radio antenna.
- http://www.selectatenna.com/

Joe Carr's Tech Notes
- Articles about receiving antenna theory, feed lines, grounds, bandpass filters and loop antennas for Mediumwave and Shortwave reception.
- http://www.dxing.com/tnotes.htm