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

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 Hollabrunn. The big problem there is that we don’t have full ac

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

Recently I bought a Motorola GM900 2m band radio on ebay for little money. I planned to mount this old 16 channel radio in my car for communicating on our local repeaters and simplex frequencies. The max output of 25 Watts should be more than enough for t

Lately I bought a Zastone D9000 2m & 70cm radio without a programming cable (as always when I buy radios 😁). From online pictures of the original programming cable I reverse engineered the pinout and built my own one from a FTDI USB to TTL-Serial con

Recently I bought a cheap Surecom radio for 2m and 70cm. Unfortunately, this radio has no proper S-Meter, only a number that indicates the signal strength. In this article I tried to create a translation table to S-Levels. A Rohde & Schwarz SME03 was use

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

changpuak.ch: Antenna and filter calculators classeradio.com: Class E AM Transmitter Descriptions, Circuits, Etc. VK1SV: Class-E for beginners dmitrynizh.com: Create Spice Models for tubes b-kainka.de: Electronic projects funknetzplanung.com: RF-Cal

Near my home-QTH is one of the tallest hills in the area, the so called "Haberg" which is 414 meters high. On its top sits a transmitting tower that every local knows but its purpose is widely unknown. Moreover, googling also reveals not much ab

As a wise teacher once said: Only Vector Graphics don't give me eye cancer. Lock at that quality! This is really for testing vector graphics on this website.

Here you can find a list of radios and other devices that I use in my Ham Shack. I am currently remodelling the whole room so I have no recent photos to show at the moment. Moreover I am planning to use a raspberry as my main ham radio PC. A list of insta

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