Posts
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Following
443
Followers
348
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
@rvedotrc The training modules I see are so painfully slow. Oddly enough, these tech companies seem to forget about neurodivergance & how awful these things are for so. many. tech. workers.
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jmorris
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mekkaokereke@hachyderm.io

mekka okereke verified

Reply to @mekkaokereke@hachyderm.io

I'm not interested in having Fedi 'splained to me. I'm just saying why more Black folk are on BlueSky:

1. It should be almost impossible for a new, non-technical user to onboard onto the Fediverse and accidentally join a server where they will receive racist death threats.

2. It should not be possible for racists to reply to a Black user's post with hateful gore images, without other users on the server knowing it.

3. It should be easy for a new admin to default into a safe, general denylist.

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jmorris

James Morris

Reply to
@gigabecquerel @Natanox I love how nuclear physics instrumentation is so OG.
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jmorris

James Morris

@kernellogger very nice!

RE: https://fosstodon.org/users/kernellogger/statuses/110282350145400526
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jmorris

James Morris

Reply to
@va3db is QEX paper only? I couldn't figure it out when I last looked into it.
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jmorris

James Morris

Reply to
@mpi_grav @LIGO Is this available to buy?
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jmorris

James Morris

@jayulfelder Anti-trans speech is a form of violence, in my view.

RE: https://mastodon.online/users/jayulfelder/statuses/110265185818357788
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jmorris

James Morris

Slow but sure progress on my 1kW HF/VHF amplifier power supply. Bought a PCB for the Eltek module and decided to solder the output wires (10 AWG THHN) rather than use the more common XT-60 connectors. After some research, I found out that XT-60s, commonly used for drones & RC batteries, are only rated at 30A continuous. The 60A figure is for peak current, and the available specs are very light on details generally. This PSU is being built for 40A continuous (at 50v), so the XT-60 is not sufficient. Next up will be to connect this Sparkfun CAN shield to configure & monitor the Eltek.
#hamradio #amateurradio #electronics
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jmorris

James Morris

Reply to @jmorris
This is all rack mountable & could be installed into gator cases for portable use with a generator. I like rack mounting into gator cases for home use generally as it can be all kept clean & self contained. And easily moved.
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jmorris

James Morris

Reply to @jmorris
And here is the power supply. 50 VDC @ 40A max. I’m using a surplus Flatpack2 server PSU, with space for a 2nd to run in parallel or backup. Also room for 28V (for relays) & 13.8V modules.
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jmorris

James Morris

Reply to
@abraxas3d wow, that is crazy. Who owned/owns the 44 network ?
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jmorris

James Morris

Reply to
@itaru @LinuxSecSummit yes if they fit the charter of Linux security development & collaboration.
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jmorris

James Morris

@LinuxSecSummit ICYMI

RE: https://social.kernel.org/objects/e72fbf67-74c7-4945-a9c6-5ea76dd25c99
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jmorris

James Morris

Reply to
@abraxas3d ok, seems problematic that anyone can modify someone else’s application.
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jmorris

James Morris

Reply to
@abraxas3d what happened to the money ?
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jmorris

James Morris

Next project: assemble these components from W6PQL into an MF/HF/6m amplifier. It’s specified for 1kW but I suspect it can do more. #amateurradio #hamradio
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jmorris
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LinuxSecSummit

Linux Security Summit 🐧

📢 The CfP for the Linux Security Summit EUROPE is now open! 📢

The event will take place Sept 20-21, in Bilbao, Spain.

See the CfP here:

https://events.linuxfoundation.org/linux-security-summit-europe/program/cfp/

The CfP closes on June 5.
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jmorris

James Morris

@mpi_grav also fascinating -- the optimistic articles in that newsletter from 2012, before gravitational waves had been detected. This is history happening right in front of us.

RE: https://social.mpdl.mpg.de/users/mpi_grav/statuses/110141099443133941
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jmorris

James Morris

Reply to @jmorris
@vk6flab the code is modified from https://github.com/SmittyHalibut/GR-MultipleReceivers
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jmorris

James Morris

Reply to
@vk6flab no, it splits out channels from the sampled rf and demodulates them to audio, and then each audio channel is fed to its own wsjtx instance. I believe there are gnuradio modules which can decode these protocols, but this works.
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