Master the DIY Moxon Rectangle Beam antenna. Detailed guide on dimensions, design, and calculations for 14MHz, 21MHz, and 28MHz ham radio bands.
Tools
The Tools category brings together both hardware and software that make your radio life easier: audio helpers, shack utilities, measurement aids, and digital tools that support building and operating. You’ll find projects like microphone compressors and RF indicators, along with curated lists of PC and web utilities for circuit design, PCB layout, simulation, logging, and on‑air operating
Getting Started with FreeDV: A Beginner’s Guide to Digital Voice on Amateur Radio
Beginner’s guide to FreeDV digital voice on HF using an SSB transceiver, computer, and sound-card interface. Learn setup, operating basics, and how open-source Codec2 delivers clear voice communication under weak-signal conditions
Simple Speech Processor for Homebrew SSB Transceivers
Simple speech processor for homebrew and QRP SSB transceivers that boosts average talk power while preserving natural audio. BF245 mic preamp, dynamic compression stage, and TL071 output amplifier improve readability and on-air presence.
Microphone Preamplifier with Diode Clipper for SSB Transceivers
Simple microphone preamplifier with diode clipper to boost and limit SSB audio for amateur radio transceivers. Prevents over-modulation, improves speech clarity, and delivers clean transmit audio in DIY HF radio setup
Housing the LARCSet: A Community-Designed 3D-Printed Enclosure
Ready to move your LARCSet off the workbench? Discover this community-driven 3D-printed enclosure project featuring STL files from Peter Marks and builds by VE3WMB.
NanoVNA Test Jig: A Practical Guide for Accurate RF Measurements
Enter the NanoVNA Test jig Kit, a simple yet powerful “sea of holes” that transforms your VNA from an antenna analyzer into a full-scale laboratory tool for component characterization and RF circuit prototyping.
4:1 UN-UN Transformer for End-Fed Antennas
Build a 4:1 un-un impedance transformer to match end-fed wire antennas to 50 Ω coax. Ideal for long-wire, vertical, and off-center-fed antennas, improving SWR and RF transfer in multiband HF installations.
9:1 UN-UN Long Wire Transformer for HF Antennas
This article explains the construction, operation, and real-world usage of a 9:1 impedance transformer (UN-UN) for long wire and random wire antennas, making it ideal for SWL listeners and amateur radio operators.
Integrating JTDX with sBitX for Advanced FT8 Operation
Learn how to integrate JTDX with the sBITX SDR transceiver for reliable FT8 digital operation. Step-by-step setup, CAT configuration, and audio interface tips for amateur radio operators
MagSafe Breadboard Turns the iPhone into a Portable Electronics Prototyping Lab
MagSafe Breadboard is an innovative concept that attaches to an iPhone and turns it into a portable prototyping lab. Ideal for learning and DIY electronics