DMR spectrum utilization is suboptimal using conventional network topologies. Trunking is a natural fit for DMR given its TDMA nature. This talk explains how controllerless DMR trunking works and how it can scale vertically to address shortcomings of conventional DMR systems. We then explore a theoretical implementation of a trunked DMR system in the amateur radio spectrum, how that might be...
I can do a presentation and show-and-tell on mag loop antennas. I have also performed WSPR test results against other antennas for comparison. Mark Skelton has seen the presentation at LARC.
Ron Schwartz 720-415-3080
Winlink email continues to be a highly-used system in incident management and disaster response operations. However, the primary client software, Winlink Express, runs only in the Windows OS, which poses problems for operators who primarily run other operating systems.
Inspired by Mark Griffith KD0QYN's PiGate concept and hardware, PiPat combines a Raspberry Pi computer, TNC-Pi 2 board...
Anyone that has used the Colorado Connection's 145.31 Thorodin repeater
has used voted receivers to access the repeater.? These voted receivers
improve coverage for lower power users and users operating in challenging
places for access to this repeater. This talk describes the problem that
voted receivers help with, analog voting hardware from the past,? the
challenge of voting receivers...
The Rocky Mountain Ham Radio DMR network has grown to over 30 repeaters, linked together through a single, commercial call routing device known as a C-Bridge. The C-Bridge provides a complex, web-based interface used by System Administrators to configure and monitor the repeater network. This talk describes the tools, techniques, and design used to produce a simplified user dashboard that...
Early investigations and experiments regarding vehicular slot antennas for VHF & UHF mobile applications. Construction, radiation patterns, feeding, matching, other practical concerns.
This is an open investigation. There will probably be more questions than answers. The content and the author's disposition will continue to evolve up to and possibly throughout the presentation.