NerdFest 2021


A series of half hour technical talks of interest to hams.

    • 08:30 08:50
      cping: Concurrent Ping and Traceroute 20m

      cping is an open source program that can be used on Linux, Windows and MacOS for real time network monitoring, tracing the path of packets and following how they path changes with time and locating intermittent network problems. The talks cover a little bit of how ping and traceroute works, and how to use the program.

      Speaker: Willem Schreuder (RMHAM)
    • 08:50 09:10
      Open Broadcaster Software 20m

      How to stream video with the least cost and minimal brain damage.

      1. Overview of our requirements and needs:
        a. To livestream classes to Zoom or YouTube Live (and others)
        b. Handle multiple cameras and views
        c. Record video for editing later and posting
        d. Easily operable by team members
      2. Tools put in place to meet our requirements
        a. Fast Computer, I9-9660K, 32gb ram, FAST 4 port video card, fast storage
        i. Because we need multiple computers, multiple input sources and screen shares, we require a fast computer. If you are doing minimal cameras and no external sources, it will work fine with most quad core computers.
        b. Open Broadcaster Software or “OBS”
        c. Elgato Stream Deck (MORE BUTTONS IS BETTER!)
        d. Multiple monitors to juggle all pieces
        i. What is needed to run a show?
        e. NDI Camera for iPhone (Any NDI camera or video feed is phenomenal.
        f. Skype allows for individual caller output via NDI!!
      3. How to bring it all together.
        a. Any Zoom account will work, but only the commercial and Webminar licenses have full unlimited functionality.
        b. A little bit of time making scenes and ensuring that the video overlays are working and clean.
      Speaker: John Maxwell (RMHAM)
    • 09:10 09:30
      Forester: a logging application 20m

      There are myriad QSO logging applications in the world specialized for almost every niche of ham radio, but I felt the need to create yet another. I hope this will be among the first of a new breed of QSO logging applications.

      Forester is a web application, but has distinct advantages over contemporary web logging sites. Built from modern tools like Angular and Firebase, Forester can be used without an internet connection, and syncs in real-time between multiple devices when internet connected. It connects to digital mode and rig control software through a small agent program. It's all open-source and built in a modular way so that other amateur radio programmers might benefit from the effort.

      Speaker: Chris Keller
    • 09:40 10:00
      Revisiting slot antennas: what, how, and what's next 20m

      Slot antenna fundamentals and build considerations; followup data from last year's V/UHF mobile antenna experiments; other work being done; next steps.

      Speaker: Chris Hamilton (AE5IT)
    • 10:00 10:20
      Care and Feeding of a 501(c)(3) 20m

      Power Point Presentation. Overview of the application process the steps needed to maintain Tax-exempt status over the organizations lifetime

      Speaker: Wayne Heinen
    • 10:20 10:40
      The day RTCMs took us back in time... 20m

      A look into time, how computers manage it and convert it, how the GPS system delivers it, how RTCMs use it and why that took down all the RTCMs in the world on 1/1/2021 at 00:00:00. Background of the problem and the fix...

      Speaker: Dave Maciorowski
    • 10:50 11:10
      QMesh: A long range, low cost wireless mesh network for digital voice communications 20m

      Wireless mesh networking protocols, such as APRS and Gotenna Mesh, allow for reliable communication between devices by relaying data between nodes until the data reaches its destination. While these mesh networks successfully communicate telemetry and small data bursts, they cannot provide the continuous streaming bandwidth needed to carry real-time voice communications. Presented here is QMesh, which leverages the FM capture effect in the LoRa waveform to allow for reliable synchronized, flooded mesh networking that can support low data rate digital voice communications. An overview of the theory, protocol design, experimental hardware, initial test results, and plans for QMesh will be discussed.

      Speaker: Dan Fay