Category: Technology
What is an SDR? An overview for radio enthusiasts
Software instead of hardware: The SDR principle A Software-Defined Radio (SDR) is a radio receiver in which a large part of the classic hardware is replaced by software. Instead of requiring separate devices for each operating…
Setting up MSI2500 SDR (RSP1 Clone) on Ubuntu - step-by-step instructions
This guide shows how to get an MSI2500 based SDR receiver (like RSP1 Clones) running on Ubuntu Linux with GQRX. The instructions are also suitable for beginners without much Linux experience. What is the MSI2500? The…
Making SDR Accessible Worldwide: A Radio Amateur's Guide to Cloudflare Tunnels
Or: How I learned to forget port forwarding and love the cloud :) Introduction Dear radio amateurs! Tired of struggling with your router's port forwarding settings? Annoyed by DynDNS services that give up at the most…
MeshCom: Your entry into a decentralized radio mesh network for radio amateurs
What is MeshCom? – a simple overview MeshCom is an open source project from the Institute of Citizen Science for Space & Wireless Communication (ICSSW), which aims to realize text-based communication via LoRa modules in amateur…
📱 Use HAMSIP with the iPhone – step by step for beginners
You want to make calls with your iPhone via HAMSIP? Here we will show you how to set up everything - from the VPN connection to the Hamnet to the finished telephony with a SIP app.…
Setting up HAMSIP telephony on the PC – step-by-step
This is a follow-up to “HAMSIP Telephony: Our New Toy ” and describes how to set up HAMSIP completely on a Windows PC, without a SIP phone and additional network hardware. 1. Request Hamnet access Go…
HAMSIP telephony - Our new toy
Some time ago we attended a HAMNET workshop in Vienna and since then we have been playing around with the Internet for radio amateurs. A separate number range on the Internet, starting with 44.xxx.xxx.xxx, is reserved…
Powerful radio power supply with Einhell batteries
As an enthusiastic radio amateur, you are always looking for innovative solutions to operate your station efficiently. I asked myself: Why not use the tried and tested Einhell 18V batteries to supply my transceiver with maximum…
Broadband receiver with a Quansheng UV-K5 - is that possible?
Michael OE8YML has long been fascinated by Quansheng devices. He was particularly interested in developing a cost-effective broadband receiver. Although there were already various kits on the market, none initially fully met his requirements. The turning…
HackRF Portapack Maymem H4M
The discovery I am constantly looking for interesting devices, kits, etc. During my online research I came across the PortaPack Mayhem MH4 - a promising SDR system for technology enthusiasts. After ordering, a waiting period of…
Emergency power supply with discarded batteries
For our project “2nd Life for GEL batteries” we converted two 140Ah GEL batteries from a UPS system. These batteries, which had to be replaced due to their age, should be given a second chance at…
Track air traffic live: SDRangel & RTL-SDR as ADS-B receivers
At the flea market in Vienna Aderklaa, in addition to the sale of used goods, there was also an interesting conversation with the radio amateur OE3LCR. He explained how to receive aircraft data inexpensively using simple…
