The Slow Scan TV images below will update every 30 seconds if I’m running the reciever for them. You never know what you might see so is kinda cool to see them appear in real time. I’m showing the last 20 images which have been decoded, usually from either 20m or 40m bands. Slow-scan television […]| MadPsy's Place
A simple and quick project for detecting when a Yaesu transciever is transmitting and feed that status to Home Assistant to then perform actions. This can be used to, for example, automate killing the power if the radio gets stuck TX’ing when using automated digital modes software such as WSJT-X remotely. It can also measure […]| MadPsy's Place
All my FT8 Awards from https://ft8dmc.eu/| MadPsy's Place
At almost 1000 QSOs with FT8 using WSJT-X I thought I’d share a quick set up guide and some tips. I won’t go into TX here, only RX for now. 1. Get audio from your radio into your computer – obviously can’t describe exactly how as it differs for everyone. 2. Download and run: https://www.physics.princeton.edu/pulsar/k1jt/wsjtx-2.2.2-win64.exe […]| MadPsy's Place
This article contains information on how to calculate the operating margin of a wireless 802.11 network using a known distance between the two points. I wrote this quite a while ago and although the throughput of wireless links has dramatically increased the basic theory still applies. Of course we now have 5GHz available, which is very useful for this […]| MadPsy's Place
Parsing JSON in Bash is never usually the best idea but sometimes it may be necessary or preferred. Here’s a nice easy script which uses the ‘jq’ command to perform JSON parsing in Bash. Let’s imagine you have the following JSON which is outputted by a stats gathering process: {"web_rate":1,"db_rate":2,"php_rate":2} Parsing that in Bash by […]| MadPsy's Place
Even having written many hundreds of Bash scripts over the years I sometimes forget the basic special parameters which are available. For that reason I’ve made this post which is a copy of the page from gnu.org. Original content from: https://www.gnu.org/software/bash/manual/html_node/Special-Parameters.html 3.4.2 Special Parameters The shell treats several parameters specially. These parameters may only be referenced; […]| MadPsy's Place
If you have an APC UPS you may not, for whatever reason, want the OS to trigger a shutdown. The ‘apcupsd’ package will call shutdown whenever the battery capacity is reported too low. To prevent this, just edit the following file. Edit /etc/apcupsd/apccontrol with your favourite editor. You should see something like this: APCPID=/var/run/apcupsd.pid APCUPSD=/sbin/apcupsd SHUTDOWN=/sbin/shutdown […]| MadPsy's Place
Here is a very simple way to download iPlayer content using a Linux command line tool. This literally downloads the stream and saves it to a file. The best part is, because they’re not DRM protected, you can keep it forever.| MadPsy's Place
The link between The Exorcist, Amateur Radio and Alan Turing.| MadPsy's Place