50MHzandUp Group

The 50 MHz and Up Group is an educational and public service amateur radio organization centered in the San Francisco South Bay area. The group is interested in developing and utilizing communications on frequencies from 50MHz up through light-waves. The group is open to any related topics that might be of interest to members, such as: technology, design, construction, operation, public service, contesting and antennas.

https://www.50MHzAndUp.org