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Linux Kernel security developer, working for Microsoft. Also W7TXT. Views are my own.
Topics: #Linux #kernel #security, #amateurradio, #RF, #hamradio, #electronics, #science, #radioastronomy, #physics, #space, #arduino.

📡 https://w7txt.net/
🐧 https://blog.namei.org/
☠️ https://www.facebook.com/w7txt
jmorris

James Morris

Reply to @jmorris
Edited 4 hours ago
Next day: W7EW in Oregon working Europe on 6m and accidentally hitting China off the side of his beam. That is a serious station.
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jmorris

James Morris

Opus 5 -maxing.
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jmorris

James Morris

Reply to @jmorris
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jmorris

James Morris

It's almost midnight, I wonder if who's on 6 metres? The entire population of Japan, it seems.
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jmorris

James Morris

What is this? Wrong answers only.
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jmorris

James Morris

My growing RISC-V menagerie.
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jmorris

James Morris

Who's ready for LinkedIn CLI?
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jmorris

James Morris

Estee Lauder 🧐
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jmorris

James Morris

Do you have a Skådis board, a specific make and model of electric screwdriver, and a 3D printer? If so, this is your lucky day.

https://www.printables.com/model/1778111-skadis-holder-for-milwaukee-m4-electric-screwdrive
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jmorris

James Morris

Inching closer to an initial release of this project (RF Deck). Incorporating changes after some field testing a couple of weeks ago.

The onboard GPS antenna is an issue, it’s pointed out the back of the device, which will often mean it’s pointed down at an angle. Flipping it over means it will look directly at the metal case of the touchscreen. Best option is a smaller GPS board which can point up, or a separate embedded antenna. For now I am using an external GPS antenna which can be magnetically attached to the top of the enclosure (see embedded magnet near fan).
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jmorris

James Morris

Edited 27 days ago
New funnel just dropped.

https://www.printables.com/model/1767474-simple-desiccant-funnel
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jmorris

James Morris

Edited 28 days ago
It's the weekend, somehow.

Anyone working on fun projects?

I have fresh polymers, a pile of aluminium extrusion, and a fistful of vague ideas.
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jmorris

James Morris

Some weekend progress on my quick* Pi5 radio terminal project. I've since added a GPS HAT, to provide accurate time for digital modes & real-time grid determination.

* About a week, +/- six weeks.
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jmorris

James Morris

I think 6m is open.
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jmorris

James Morris

Radio folk: here's something I just learned. Sporadic E propagation sometimes opens up at night. Noticed some reports from AZ last night around 11PM for my 50 MHz FT8 test transmissions. Turns out this is or was an interesting research area.


#amateurradio #hamradio
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jmorris

James Morris

Minneapolis backrooms.
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jmorris

James Morris

Doing a bit of a deep dive into 3D printing engineering filaments this weekend. Nylon + CF is a great all-rounder, it seems. Perhaps like how 6061 Aluminium is for metal fabrication.
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jmorris

James Morris

Playing with a Raspberry Pi 5, 4MB RAM. It’s been a few years since I looked at the Pi — my old one is a v2. These have come a very long way.
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jmorris

James Morris

Reorganizing my home office & added a new switch to provide PoE and SFP. The latter is for steaming I/Q samples from mast-mounted SDRs for local processing. POE is for desktop IP phone (SPA525G) & SBC hacking.

Quite happy with this low-cost Linksys so far. 1990s me with a 10BASE2 net connected to a dial up modem would be astonished.
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jmorris

James Morris

Reply to @jmorris
Europe / Africa circuit. Thick blue line is the magnetic equator.
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