OpenWRT als WireGuard-Appliance
Sunday, June 21, 2020 in Blog
Language note This post was written in a hurry at the start of the Covid-19 pandemic in 2020 as a way to get people (and their offices) usable for remote work quickly. This is also the reason why it’s written in German language. Some of the …
GPS locked Raspberry Pi
Sunday, June 23, 2019 in Blog
For highly-accurate timekeeping or signal generation with a Raspberry Pi, it’s possible to replace the on-board crystal with an external reference input. On the Raspberry Pi 1 the main system oscillator is a 19.2 MHz quarz crystal. In order to …
Es'hail-2 transceiver setup
Saturday, April 27, 2019 in Blog
QO-100, also known as Es’hail-2 is a geostationary amateur radio satellite. It can be used by large parts of the world, including Europe, Africa, (parts of) South America and Asia. The satellite works as a linear transponder. It receives a …
ThinkPad PowerSeries 820
Tuesday, April 23, 2019 in Blog
One of the rarest ThinkPads is the ThinkPad PowerSeries 820, running a Power PC 603e at 100 MHz. It’s code name is Wiltwick, the type designator (used in Windows) is 6040. It uses an 800x600 TFT, WD90C24A/G10 graphics and has a 1.2 GB SCSI HDD. …
PlutoSDR clock input
Saturday, January 05, 2019 in Blog
Warning! This modification voids the warranty and can operate the transceiver outside of it’s absolute maximum ratings! The PlutoSDR has an internal XO (Rakon RXO3225M 40.000 MHz), which has excellent qualities like very low jitter. …
WiFi over satellite TV coax
Sunday, October 14, 2018 in Blog
There’s a number of different ways to distribute an ethernet signal throughout a building. The most common types being: twisted pair wiring fiber optic cable WiFi (2.4 GHz, 5GHz) powerline (also called PLC, IEEE 1901) In my application, running …