RF mixers: how a receiver moves a signal to another frequency
A radio mixer is not an audio mixing desk. It is a frequency-conversion circuit. By combining an incoming signal with...
RF amplifiers: why an LNA and a PA solve different problems
“Add an amplifier” sounds like a simple way to improve a radio link. In practice, you must first identify which...
Can transmitting without an antenna damage your radio?
Yes, it can, but “powered on” and “transmitting” are different states. The main concern is a transmitter delivering RF power...
Antennas for LoRa networks: choose the pattern, not just the biggest number
An antenna is part of a complete radio installation. Its frequency range, radiation pattern, polarisation, connector, cable and mounting position...
Reticulum, RNode and LXMF: understand the layers and build your first link
Reticulum is a way to build data networks across different communication media. LoRa can be one of those media, but...
Meshtastic in practice: build a network that delivers useful messages
A successful Meshtastic project is not the one with the most nodes on a map. It is the one that...
LoRa explained: range, airtime and choosing the right network
LoRa is useful when a small amount of information needs to travel farther than an ordinary short-range radio link. It...
Meshtastic: understand radios, channels and your first network
A radio on the table, a phone in your hand and a message appearing on another device: that is a...
