Amateur Radio Weekly – Issue 300

Amateur Radio Weekly

Meet the Raspberry Pi 5
Increased CPU performance and a significant GPU performance bump.
SparkFun Electronics

Air Force seeks to explore terahertz radio
One of the last frontiers in military RF communications.
Military Aerospace Electronics

Crushing spurs with better bandpass filters
The results were really good.
SolderSmoke Daily News

Junk box loading coil
This coil covers 40M through 17M.

From Amateur Radio operator to creator of the Smith Chart
Phillip Smith, an Amateur Radio operator working at Bell Labs, devised a chart that even today can help engineers understand the behavior of transmission lines.
All About Circuits

WSPR Watch version 4
A long overdue re-write of the app in the modern SwiftUI framework.
Marxy’s musing on technology

Dipoles–A domestic secret weapon
The dipole is the oldest antenna—Herr Professor Heinrich Hertz used a dipole in his 1888 experiments.

Bit by The Black Widow: a 15 meter Moxon Antenna project
The Moxon is an 2 element Yagi style antenna that boasts of a low takeoff angle and high front/back signal to noise ratio.

MMDVM-based projects to merge into one Open-Source project
Many of the long-term bugs in the software have been fixed.


How to read VOACAP charts
Understanding propagation charts.
Broken Signal

Radio texting the easy way
Simple web chat over APRS using DigiPi.
KM6LYW Radio

HF APRS & HF Winlink on ANDROID devices
A new Robust Packet TNC called the Teensy RBR TNC.
Off-Grid Ham Radio OH8STN

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Amateur Radio Weekly is curated by Cale Mooth K4HCK. Sign up free to receive ham radio's most relevant news, projects, technology and events by e-mail each week at

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