DXR Electronics Bits

Custom zBitx Software v5.11s is now available for V1 and V2 transceivers, bringing improved stability, refined controls, better field usability and continued support for CW, SSB and FT8 operation.

No RTL-SDR dongle, no Raspberry Pi, no FPGA — just a 1.85-gram chip-scale module that listens to both ADS-B bands and hands you clean aircraft tracks over UART.

The 20-10 meter fan dipole offers broadside East/West coverage across multiple amateur radio bands.

A new generation of browser-based FT8 tools is changing how hams get on the air.

A detailed look at a compact 29 MHz AM transmitter for the 10-meter amateur band, covering the BD136 crystal oscillator, BD135 RF stage, modulation, output filtering, component values and construction techniques.

TinyDX is an incredibly compact open-source HF digital modes transceiver designed specifically for FT8 and FT4 operation.

Discover the compact SM0VPO miniature magnetic loop antenna for the 80-metre amateur band.

Pebble HF is an open-source, single-band 20m QRP transceiver built by the Ham Radio Duo — Becky (N4BKY) and Mike (N4FFF) — in collaboration with Barb (WB2CBA), who did the hardware design, and Guido (PE1NNZ), whose uSDX firmware forms the software backbon…

A complete walkthrough of building a web-accessible SDR receiver using the RTL-SDR V4 dongle and OpenWebRX — covering both the official Raspberry Pi image and Docker installation methods, SDR device configuration, antenna and noise-reduction tips, and a p…

sBitx 5.4 is a major release for this open source HF transceiver, adding FM mode, CESSB audio shaping, new display support, and automatic power safeguards.

Ever wondered how classic audio gear tames loud volume spikes without complex integrated circuits?

Learn how to build a simple and effective 40-10m Off-Center Fed (OCF) Dipole antenna.

This guide walks you through a simple FM receiver circuit built around a BF256 FET and LM386 audio amplifier IC.

Five space-saving HF antennas for city hams: Mini G5RV, Shorty 4020, UA6CA Windom, Window Loop, and 40m Mag Loop.