Author: Doug
The world of Raspberry Pi Clusters
(or – how to chuck a heap of computers into a small space… to do SDR functions.) So – One of my fellow Ham operators here in Canberra, Wade (VK1MIC) showed me a photo of his cluster of…
Read More »Building Hardware to Communicate with a LORA Satellite
A couple of months ago, a Spanish PicoSatellite (5cm x 5cm x 5cm) was launched called FossaSat-1 ( https://fossa.systems/ ). It was designed using open source principles and provides a LORA downlink on 70cm UHF using a standard…
Read More »QRP Labs Ultimate3S
Sooooo. A long time ago I discovered that I enjoyed using the Weak Signal Propagation Reporter (WSPR) to see how open various bands were during the day. I even went to various parks at lunchtime to set up…
Read More »G90 and JT8
Today I worked on getting JT8 working with my G90. It was a bit of a journey, so I thought I would add it to my blog for later use. Rig control: The G90 CAT interface is a…
Read More »Ham Radio Delux and the Xiegu G90
I am enjoying the G90 that I purchased the other week, and now that work is over for the year I have time to start getting it ready for digital modes. One thing that infuriates my enormously is…
Read More »Xiegu G90
I recently gave myself a small Christmas gift of a Xiegu G90. I have been eyeing them off for a number of months, and a large client order associated with one of my businesses provided the funds to…
Read More »Finally finished my DMR hotspot
Success! After initially putting together a DMR hotspot based on a MMDVM hat mounted on a Raspberry Pi and configuring with a pi-star image in December last year, I finished putting together the enclosure for it today. I…
Read More »mcHF clones from China
So much has happened in the time since I last posted – I have moved house (and workshop), changed employers, etc, etc, and not been in a position to do much SOTA work, but thats ok –…
Read More »A Rockwell RSC Forth System
When I was a trainee in the Electronics Lab at the Research School of Physical Sciences at the Australian national university, we used Forth to control systems. Tom Rhymes had designed a locally developed Z80 STD bus board,…
Read More »A Slightly Toasted Icom AH4 Antenna Tuner
I purchased a slightly toasted AH4 tuner, which had clearly been overloaded during the tune cycle. The power attenuator had been thoroughly cooked. I spent a couple of afternoons removing the burnt area of the PCB using a…
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