Getting my amateur radio (ham) license

After four decades in the broadcast radio industry, I finally convinced my Dad to join me in getting an amateur radio license this summer.

In the US, there's a huge community of amateur radio operators, or 'Hams' for short. There's a whole history to how they got that name, but to me, radio's a lot of black magic.

Throw on top of that the fact that Hams are always slinging around weird terms like QRT, using morse code—or as

Ham radio license manual

A Pigeon is still faster than the Internet

Jeff Geerling holding a homing pigeon

In 2009, a company in South Africa proved a homing pigeon was faster than an ADSL connection , flying a 4 GB USB flash drive to prove it.

Besides IEEE's speculative work , nobody's actually re-run the 'bird vs. Internet' race in over a decade.

Now that I have gigabit fiber, I thought I'd give it a try.

Video

I published a video with all the details—and even more background on the graceful birds used in the


My own magic-wormhole relay, for zippier transfers

If you've ever had to transfer a file from one computer to another over the Internet, with minimal fuss, there are a few options. You could use scp or rsync if you have SSH access. You could use Firefox Send , or Dropbox, or iCloud Drive, or Google Drive, and upload from one computer, and download on the other.

But what if you just want to zap a file from point A to point B? Or what if—like me—you want

rsync 40 MB/second

Soundproofing my studio: what's in a wall?

Jeff with resilient channel

Soundproofing is... kind of an art. It's not as simple as buying something and slapping on your walls. And the word 'soundproofing' is a bit of a loaded term.

You could mean deadening sound , so you can record podcasts with that signature radio sound. Or you could mean isolating a room from outside noise, which is an entirely different process. Or you could work on reducing resonance, echo, or just certain frequencies.

In my case, I wanted to build kind of a


Testing iperf through an SSH tunnel

I recently had a server with some bandwidth limitations (tested using scp and rsync -P ), where I was wondering if the problem was the data being transferred, or the server's link speed.

The simplest way to debug and verify TCP performance is to install iperf3 and run an iperf speed test between the server and my computer.

On the server, you run iperf3 -s , and on my computer, iperf3 -c [server ip] .

But iperf3 requires port 520


Fork Yeah! Examining open source history after Red Hat's move

We're at the stage in the Red Hat drama where everyone is consulting history, trying to figure out what parts are being repeated in 2023 after Red Hat effectively locked down the sources used to build RHEL clones .

One talk linked quite often was Fork Yeah! The Rise and Development of illumos , by Bryan Cantrill over a decade ago. Bryan was a software engineer at Sun, who went over to Oracle after the buyout, then left to join Joyent, and now resides as CTO of Oxide.


Time Card mini adds Pi, GPS, and OCXO to your PC

For LTX 2023 , I built this:

CM4 Timecard mini GPS locked

This build centers around the Time Card mini . Typically you'd install this PCI Express card inside another computer, but in my case, I just wanted to power the board in a semi-portable way, and so I plugged it into a CM4 IO Board.

The Time Card mini is a PCIe-based carrier board for the Raspberry Pi Compute Module 4, and by itself, it allows you to install a CM4 into a PC, and


Clearing up FUD surrounding Red Hat's actions

As someone who champions truth, yet knows truth is bent to espouse many ideas, I realize clever phrasing often turns irrational lies into strong beliefs—especially when passion takes over.

And we in the open source community are a passionate bunch.

Red Hat on mountain, generated by Bing AI images

But to clear the air a little bit—especially as I have seen some zingers going both directions (from Red Hat employees to the community, and vice-versa):

  • Red Hat is not going closed source : But they are closing off public access to


Building a tiny 6-drive M.2 NAS with the Rock 5 model B

As promised in my video comparing SilverTip Lab's DIY Pocket NAS (express your interest here ) to the ASUSTOR Flashstor 12 Pro, this blog post outlines how I built a 6-drive M.2 NAS with the Rock 5 model B.

The Rockchip RK3588 SoC on the Rock 5 packs an 8-core CPU (4x A76, 4x A55, in a 'big.LITTLE' configuration). This SoC powers a PCIe Gen 3 x4 M

6-bay Rock 5 NAS

Ampere Altra Max - Windows, GPUs, and Gaming

Ampere Altra Developer Platform Workstation

I'm testing Adlink's Ampere Altra Developer Platform . This machine has a 96-core Arm CPU, but now they sell a 128-core version. Apple also recently released the M2 Ultra Mac Pro , so the model I'm testing isn't the "fastest in the world" like I could boast a couple months ago... but it's close, and I actually doubled my performance from last time—I'll show how later.