Aperiodic multiband wire antenna design by HB9KX/DK7ZB: 10.5 m asymmetrical dipole with resistive loading for broadband HF coverage without complex tuning
radio
The radio category groups together posts that are about complete radios and operating rather than individual circuits—transceivers, receivers, handhelds, SDR rigs, and real‑world operating notes. You’ll find write‑ups on rigs like Curumim, sBitx, ZBitx, Baofeng UV‑5R Mini, uBITX experiences, and other commercial or homebrew radios, often with a strong “how it actually behaves on the bands” focus.
H.J. Berndt’s Firmware for the ATS-Mini DSP Radio
A deep dive into H.J. Berndt’s alternative firmware for the ATS-Mini. Learn about the new UI, AFC improvements, and how to flash this powerful update to your DSP receiver.
Hydra SDR RFOne Faces Criticism Over Performance Issues
The Hydra SDR RFOne, a highly anticipated software-defined radio (SDR) receiver, has been facing criticism from users and experts alike due to persistent performance issues. Despite its promising features and capabilities, the device has been plagued by problems that have left many disappointed. HydraSDR RFOne has been met with criticism primarily regarding potential gain issues, […]
ATS Mini V3S Officially Launched: Battery Drain Issue Finally Fixed
After weeks of anticipation and user feedback, the ATS Mini V3S has officially hit the market. The new release directly addresses the battery drain issue that affected its predecessor, making this a much-needed upgrade for loyal ATS users. What’s New in ATS Mini V3S? The V3S model is not just a minor update—it’s a refined […]
OSPI vs QSPI in ATS Mini Radio: How to Identify Your Flash Interface
Learn the difference between OSPI and QSPI flash interfaces in ATS-Mini radios and how to identify your hardware variant. Practical checks using chip markings, PCB traces, and firmware logs to ensure correct firmware flashing.
HackRF Pro: Great Scott Gadgets Unveils Powerful New SDR
Meet the HackRF Pro from Great Scott Gadgets. This powerful successor to the HackRF One features a 100 kHz to 6 GHz range, built-in TCXO, and USB-C for advanced SDR development
AM Radio into an SSB Receiver with a Simple BFO Circuit
Learn how to convert a standard AM radio into an SSB receiver using a simple BFO circuit. Step-by-step guide to receiving single sideband signals on your homebrew or vintage radio.
Simple Receiver S-Meter Circuit for Your Radio
Stop guessing signal strength! Build this easy, low-cost S-Meter circuit to give your homebrew radio a professional visual indicator for incoming signals and tuning.
HydraSDR RFONE: A New Benchmark in Open Source SDR
HydraSDR RFOne is a fully open-source 24 MHz–1.8 GHz SDR receiver with 10 MHz bandwidth, 12-bit ADC, and USB-C — a high-performance wideband platform for satellite, VHF/UHF, and RF research
Log audio Compressor Circuit for Smooth Natural Compression
Discover how to build a Logarithmic Audio Compressor circuit for smooth, natural-sounding audio. This guide features a high-performance schematic using precision op-amps and log-antilog transistors to prevent distortion while maintaining consistent signal levels for amateur radio and pro-audio projects.