LOW FREQUENCY MAGNETIC RADIO

Theory, practice, advice, radio kits and circuit boards, volunteer and commercial services, and other cave related electronic stuff.
My old website http://radiolocation.tripod.com is no longer maintained but has useful information not given here. More information will be added here from time to time.
This site was last updated on April 11, 2022.
For the latest information click on the links below:
This site was last updated on April 11, 2022.
For the latest information click on the links below: