Posts
469
Following
474
Followers
380
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 @corbet
@corbet yep, the enshittification is underway
1
0
0
jmorris

James Morris

Testing a 2-wire fan dipole on HF, doing some ALE. It’s always fascinating to see physics & information theory working per the math. Anyone else?
#amateurradio #hflink #ale #hf #antenna #rf #hamradio #radio
2
1
6
jmorris

James Morris

Very useful!

RE: https://fosstodon.org/users/kernellogger/statuses/110059888755223720
0
0
0
jmorris

James Morris

Reply to
@adamcsmith the Wellbrook loops seem to be sold out.
0
0
1
jmorris

James Morris

Reply to
@adamcsmith I've been thinking about getting one as a separate RX antenna in high noise environment. Need to accelerate that. And yes, I've noticed that if there's just one station in a region receiving my WSPR signal, it is often using a Wellbrook.
1
0
1
jmorris

James Morris

Finally learning #gnuradio. It's amazing.
1
1
7
jmorris
repeated
LinuxSecSummit

Linux Security Summit 🐧

ICYMI

RE: https://social.kernel.org/objects/b29af78c-329b-4bbb-9d99-81299bd1b6e7
0
1
1
jmorris
repeated
LinuxSecSummit

Linux Security Summit 🐧

📢 The schedule for the 2023 Linux Security Summit North America is published! 📢

See https://lssna2023.sched.com/

LSS-NA 2023 will be held in Vancouver, BC, Canada 🍁 from May 10-12.

🖋 Register to attend here: https://events.linuxfoundation.org/linux-security-summit-north-america/register/
0
10
5
jmorris

James Morris

@pid_eins great to see this!

RE: https://mastodon.social/users/pid_eins/statuses/109959112315995623
0
0
2
jmorris

James Morris

re: CW transphobia
Show content
@ruscur depressing & just not where we should be in 2023

RE: https://ozlabs.house/users/ruscur/statuses/109964183572477416
0
0
1
jmorris

James Morris

Reply to
@vk6flab Look at the footnotes, especially 150. Why this is not called out explicitly in the national regs is unclear (FCC does the same here -- you need an army of lawyers for this stuff).
0
0
1
jmorris

James Morris

Reply to
@vk6flab That is bananas. I've been out of .au for a few years now so didn't know this. All of the VH5A* entries in ACMA are for commercial or govt users in SA. One close callsign is the Bureau of Meteorology, so I was wondering if it was them monitoring for space weather.
1
0
0
jmorris

James Morris

Reply to
@vk6flab I don't see it listed in the ACMA database. Could be a made up callsign for rx only.
1
0
0
jmorris

James Morris

Reply to
@vk6flab They will show up if they are just listening, which is the case here. It's valid for people with the right experimental license, and possibly at very low levels within Australian ISM rules (I'm more up to date on the US rules here and it is in the microwatt range on these frequencies).
1
0
0
jmorris

James Morris

Edited 2 years ago
Slightly longer form blog on recent #8m experiments:

https://w7txt.net/2023/03/03/adventures-in-the-8m-band/

#amateurradio #hamradio #vhf #wspr
0
1
1
jmorris

James Morris

Reply to @jmorris
btw, this is the best resource on #8m - https://ei7gl.blogspot.com/p/40-mhz.html

There's an io.groups list and a Facebook group ( 🤷 ), see url.
0
0
0
jmorris

James Morris

Reply to @jmorris
Edited 2 years ago
Also, a very good signal here from VA2CY up on Île d'Orléans QC, with apparent doppler shift due to the movement of Sporadic E clouds between our stations. If you look closely at the top, there's a very weak trace from another station with some aircraft scatter (no decode). I think that is WM2XCW in Point Roberts,BC near the Canada/US border. ETA: confirmed this is not doppler shift, it's transmitter drift.
0
1
2
jmorris

James Morris

I've been monitoring the 8m band recently (yes, 8m!). It's generally an ISM band with some experimental licenses issued in the US, Canada, and other countries, as well as a few amateur allocations in Europe. Some great propagation happening today between Australia/NZ and USA/Canada, on 40.68 MHz.

#hamradio #amateurradio #wspr #8m #40MHz #vhf #radio
2
2
6
jmorris

James Morris

Edited 2 years ago
On a whim I tuned to the 630m band in WSPR, and was surprised to see a couple of stations. I had no idea my system could receive anything on 474 kHz. I think the signal around 1840 Hz baseband is QRSS.

The antenna is just a 100ft dipole fed with ladder line via a 4:1 balun and tuner. I believe the tuner was set for 80m.

#amateurradio #wspr #wsjtx #hamradio #radio #mf
1
1
3
jmorris

James Morris

Reply to
@mairin Good luck, been through a few of these types of things.
0
0
1
Show older
About social.kernel.org

Terms of service

  1. Please do not use this service in violation of the Linux Kernel Code of Conduct. Doing so will result in your account suspension with the referral of the matter to the CoC committee.

  2. "Repeating"/"boosting" someone else's status on this platform will be treated as endorsement and will fall under rule #1.

  3. You are encouraged to use this platform to promote your work on the Linux Kernel, but there is no restriction on permitted topics (with the exception of anything covered by #1 above).

  4. There is no requirement to post in English, but it should be considered the primary language of communication on this platform.

Privacy notice

The admins of this service have access to all posted statuses. They aren't looking, but if it's something they shouldn't know about, then you should not post it on this platform.

Please see the Linux Foundation Privacy Policy, which applies to this platform as well.

Getting your own account

If you would like an account on this instance, please check that the following applies to you:

  • You are listed in MAINTAINERS or CREDITS

  • OR: You have a kernel.org account or email address

  • OR: You have a long and established history of involvement with the Linux Kernel

If the above is true and you agree with the Terms of Service and Privacy Notice listed above, please use these instructions to request an account: