Recently I bought a Bluetti AC240P battery box. It has a 12V DC 30A output that I would like to use for powering my amateur radio equipment and caravan. Unfortunately, Bluetti uses connectors that seem property at the first glance, but with a bit of resea

Server power supplies can often provide a very high current at their 12V output therefore they are very attractive as power sources for amateur radio use. As these are switching mode supplies it is possible that they cause interference on some bands. Neve

Info: Our club station now has its own website: OE3XHU.AT Info: Sometimes the WebSDR is not available but will be restarted in about 24h after I got informed. Since a few months now we are hosting a WebSDR from our ham radio club station in the STH Holl

The SA868 and similar modules from NiceRF have a quite long delay between pressing PTT and the transmitted audio actually coming "on". Some online sources say that this delay is about 700ms which is much to long for many applications. I wanted t

I recently bought this Bluetooth audio module from Amazon (also available for a lower price on Aliexpress). The cool feature of it is that it can pass through audio. It has an aux input where another analog audio source can be connected. A relay automat

Warning: Since this article got so many views, I have to inform you that modifying your radio to transmit with higher power or out of the CB-band is illegal if you are not a ham. In addition: Warranty void Info: This article is regularly updated with new

In the latest episode of our endeavor to create a Brainfuck meta-compiler we got a first working version and learned about some interesting behaviors of the v8 JIT optimizer. When leaving off, I mentioned that there are still many opportunities left to im

This article is a guide on how to set up a simple network-attached storage (NAS) computer based on a Raspberry Pi and external hard drives connected via USB. To follow along basic understanding of how to install and use a Linux OS is required, but to get

If you had to describe what a programming language looks like really precisely to someone lacking any ability of independent thought, someone struggling to understand basic natural language, suffering from the complete inability to make any kind of useful

When I first started learning JavaScript by following along with “The Coding Train” on YouTube (formerly Daniel Shiffman) one of the first things I did was to download a text editor with a cool looking dark theme. Up to this point, the only things I use

Have you ever looked at Google's “Did you mean” field and wondered about the magical sorcery their servers use to interpret some kind of sensible meaning from your auto correct gibberish? Well, at least I have, but sorry to disappoint you I have got not a

I needed to compile the firmware for the HackRF One because I wanted to use a 26MHz TCXO as external clock instead of the standard 10 MHz clock. While doing so I encountered a problem with YAML. It was installed but "make" returned "No modu

My first computer was a PC built from parts thrown out by my dad’s workplace. It was an old tower PC running Windows 2000. Over the years we added parts and replaced others until I bought an Intel Pentium G2020 dual-core at some point making my PC the fas

I recently bought a Chinese Diesel heater to heat my green house during cold spring nights. Here I will share some important tricks and precautions I found while using the device. The tomatoes like it 😄 You can reduce your Diesel consumption by mixing

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I repared this generator and didn't find the manual on the web therefore I will provide it here .

On Halloween we hold our second activity day for this month. We planned to do some SSTV and Packet radio in addition to talking but unfortunately the car of OM Nebi broke. Therefore, only two stations (AT3TEC, AT3BO1) were available on PR plus Nebi rode a

Saturday was a perfect day for going on air on CB from my local breaker hill called Sauberg (JN88AM). It was a calm, sunny and warm fall day, so I put up my big 9m antenna (Gain Master replica) which allowed me to hear every station that joined our group.