Posts
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Following
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Followers
349
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

@maehem that font brings back memories.

RE: https://mastodon.social/@maehem/112497725751975147
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maehem@mastodon.social

Mark J Koch ✅

A gentleman named Paul Khoury approached me about getting a retro computer he'd acquired up and running. The computer is a Sun SPARCstation UPN (1997), a prototype for a super small desktop computer that preceded the Mac mini by about 6-7 years. Only about 20 were ever made. I was the designer on the project and had poured my soul into it, so I was proud to help him get it running. I dug out the schematics from storage and gave any advice I could remember and he got it powered on in a few days.

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jmorris

James Morris

Reply to @BoscoLab@social.tchncs.de
@BoscoLab I need one of these!
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jmorris

James Morris

Reply to @g4dbn@mastodon.radio
@g4dbn thanks. Getting some low band (3cm) projects done before heading back up to mm-wave+.
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jmorris

James Morris

Very excited to have a paper published in DUBUS. I’ve been reading this journal for about a decade and never imagined when I started that I’d be published there. The journal is also translated into German (or English) by the editors, as it’s a dual language publication.

#hamradio #amateurradio #microwave
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pid_eins@mastodon.social

Lennart Poettering

1️⃣5️⃣ Here's the 15th installment of posts highlighting key new features of the upcoming v256 release of systemd.

systemd integrates with many components of the OS. Due to this it links against various external libraries. Generic distributions – which typically enable all features a package provides – usually have to deal with relatively large dependency trees in cases like this.

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jmorris

James Morris

Reply to @jmorris
Edited 9 months ago
“Don’t ask me how I did it I just did it it was hard”. J/K, I will document this properly soon and it’s much simpler and than it looks.
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jmorris

James Morris

Reply to @flpvsk@mastodon.social
@flpvsk I added these to my last Sparkfun order, has the usual collection of sizes.
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jmorris

James Morris

Reply to @jmorris
@Stormgren @kb6nu also, FM repeaters, which will be vertical
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jmorris

James Morris

Reply to @Stormgren@obsidianmoon.com
@Stormgren @kb6nu yep, check beacons, and wspr, dxmaps etc. seems quiet now. Local VHF groups can be helpful when setting up. The antenna should rx ok-ish on 10m, too.
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jmorris

James Morris

Reply to @ftg@mastodon.radio
@ftg looks like indium shim ?
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jmorris

James Morris

It feels like cheating to use these pre-cut wire links for soldering (vs. push-in breadboard), but I’m over making these by hand. #amateurradio #hamradio #electronics
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jmorris

James Morris

Reply to @kelvin0mql@mastodon.hams.social
@kelvin0mql @vees you need to visit the Australian outback, Milky Way easily visible (much better vantage point) and you can also see the Magellanic Clouds, with the naked eye.
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jmorris

James Morris

Reply to @jarkko
@jarkko I’ve never played with FPGAs, need to fix that at some point. This is possibly very relevant to RF digital, lots of amateurs now using s/w modems via usb sound, but performance is not optimal at high bandwidths. They will struggle to utilise the full potential of the recent FCC changes in the US to increase the data rates allowed on HF.
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jmorris

James Morris

Prototyping a monitor circuit for GaN RF power amplifier devices. This is indicating drain current and heat sink temperature, and can be expanded to other measurements as needed. What started as a ‘simple’ project became an entire side quest. This uses an Arduino Pro Mini, an INA169 current sensor, and a thermistor. Could be done more simply with a PIC but this is what I had. The cheap OLED display self destructed not long after this photo, as I fed it 12v instead of Vcc.
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jmorris

James Morris

Reply to
@bytex64 post some?
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mpi_grav@social.mpdl.mpg.de

MPI for Gravitational Physics

📣 Postdoc job alert 📣

The “Astrophysical and Cosmological Relativity” department at the @mpi_grav in Potsdam announces the opening of several postdoctoral appointments.

These appointments will be in the area of data analysis and its interface with waveform modeling for the recently adopted space-based gravitational-wave detector LISA.

ℹ️ https://www.aei.mpg.de/1155448/acr-lisa-postdoc

📅 apply by May 21, 2024

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LWN@fosstodon.org

LWN.net

[$] Systemd heads for a big round-number release https://lwn.net/Articles/971866/

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James Morris

Reply to
@lzg many protestors have absolutely no idea what is going on or who they're working for
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jmorris

James Morris

Uh, why does dropbox "need" access to my contacts?
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