Onno (VK6FLAB)

Anything and everything Amateur Radio and beyond. Heavily into Open Source and SDR, working on a multi band monitor and transmitter.

#geek #nerd #hamradio VK6FLAB #podcaster #australia #ITProfessional #voiceover #opentowork

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Joined 3 years ago
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Cake day: March 4th, 2024

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  • Since radio spectrum is shared globally because radio waves don’t follow political boundaries, it’s coordinated by a UN body called the ITU, the International Telecommunications Union.

    There are a few frequency ranges set aside for so-called ISM (Industrial Science and Medical) use.

    The 2.4 GHz band was set aside for such use and together with Wifi, Bluetooth and baby monitors, it’s used for all manner of other things.

    Since the range at low power is quite short, many devices can share the same frequency and not interfere with each other.

    Here’s some background.

    https://en.wikipedia.org/wiki/ISM_radio_band












  • I moved from VMware Fusion after a hardware failure and migrated to Proxmox. I use VMs to isolate client information and to test and use different OS versions and distros.

    I have a VM that runs Docker and connect to it via SSH for running applications I don’t want to install on my main workstation.

    My main workstation is also a VM.

    I came from bare metal Linux for years and found that I spent too much time recompiling kernels to make it work with my hardware.

    Now that everything is a VM, changing underlying hardware, and even hypervisor is trivial.

    If VMware hadn’t been bought by Broadcom and allowed me to virtualise x86 on Apple Silicon, I’d still be running VMware Fusion. UTM by the way is completely unreliable … I really tried.

    As it is, I’m running Proxmox on AMD.

    in summary, Proxmox allows me to build what I need when I need it virtually and it’s running on a standard Debian host.

    Edit: #$#__# autocorrect (unreadable -> unreliable)










  • On September 11, 2001, nineteen terrorists who were members of al-Qaeda, an Islamist extremist network, hijacked four California-bound commercial airplanes shortly after their departures from airports in Boston, Massachusetts; Newark, New Jersey; and Washington, D.C. In a coordinated attack that transformed the planes into weapons, the hijackers intentionally flew two of the planes into the Twin Towers of the World Trade Center, and another into the Pentagon in Arlington, Virginia. Learning about the other hijackings through telephone calls, passengers and crew members on the fourth plane launched a counterattack. When the passengers attempted to breach the cockpit, the hijacker pilot, who had changed course toward the nation’s capital, crashed the plane into a field in Somerset County, Pennsylvania, near the town of Shanksville.

    Nearly 3,000 people were killed on that day, the single largest loss of life resulting from a foreign attack on American soil, and the greatest single loss of rescue personnel in American history. Approximately two billion people, almost one third of the world’s population, are estimated to have witnessed these horrific events directly or via television, radio, and Internet broadcasts that day.