Welcome to K4RJM
A place to share amateur radio experiences, digital voice technology, equipment reviews, software projects, and practical information for fellow radio enthusiasts.
Articles & Blog
Analog FM, DMR, Fusion, D-STAR, P25 and NXDN: Which Radio Should You Buy Next?
October 12, 2026 • K4RJM
A comparison of amateur radio digital voice popularity, users, repeaters, and practical buying considerations
Software & Projects
Baofeng Mini 5 BT CPS — Unofficial
A community-oriented programming tool for the Baofeng Mini 5 Bluetooth radio.
Open the CPS Application →