ATS20 Radio Receiver: Comprehensive Review – Small Package & Big Performance
ATS-20 is a compact SI4732-based multiband DSP receiver covering FM, MW, SW, and SSB —…
Circuits
DIY
HF
QRP
Transmitter
Building Steve Quest’s Simple AM Transmitter
This simple AM transmitter uses a crystal-controlled oscillator and transistor stages to generate and amplify…
audio
Circuits
DIY
Tools
Audio compressor for microphone
This microphone audio compressor uses an LM324 op-amp with multi-stage amplification, diode-based gain control, and…
Circuits
Digital modes
DIY
HF
Building an FT8 Digital Interface – Dive into Digital Modes
This FT8 digital interface connects a computer to a transceiver using a USB sound card,…
Circuits
CW
DIY
HF
QRP
Transmitter
Simple CW 74HC240 Transmitter using buffer IC
This simple CW transmitter uses a 74HC240 buffer IC as both oscillator and driver to…
Circuits
DIY
HF
QRP
Transmitter
Build Your Own Micro Power AM Transmitter!
This micro power AM transmitter uses a crystal-controlled oscillator and a 2N2222 transistor stage to…
News
radio
Reception
Reviews
HydraSDR RFOne: A New Contender in the SDR Market Challenges the Airspy R2
This article explains how the HydraSDR RFOne enters the SDR market as a direct competitor…
Articles
News
radio
Reviews
ATS MINI ESP32-S3 SI4732 Pocket Radio DSP Receiver – Technical Analysis
NOAA-15 & NOAA-19 shutdown in Aug 2025 ends APT signals. Hobbyists: explore Meteor-M2, GOES, &…