Master Ham Radio Guides & Tutorials

This page brings together in‑depth Ham Radio guides, tutorials, and how‑to articles from DXR Electronics Bits—covering SDR, DRM, propagation, digital modes, receivers, and practical operating techniques, without any news or project‑build posts. SDR, DRM & Reception Tutorials Receive DRM with HDSDR and DREAM Decoder Using RTL‑SDR Build a complete DRM receive chain with an RTL‑SDR 

Master Ham Radio Guides & Tutorials:

Real-World Feedback: Navigating the zBitx v2 Issues and Upgrades

Real-World Feedback: Navigating the zBitx v2 Issues and Upgrades: Dive deep into the real-world performance, software bugs, and safety considerations of newly released zBitx v2 issues and feeback open-source SDR transceiver.

OXO QRP HF Transmitter

The OXO QRP HF transmitter is a simple, low-power CW (continuous wave) transmitter designed by George Burt, GM3OXX. It is a single-band transmitter that can be built to operate on any of the amateur radio bands from 160 to 20 meters. The transmitter is built around a few standard transistors and a crystal oscillator. It is an elementary circuit to build, and can be assembled from a kit or from scratch.

Fig: OXO QRP HF Transmitter

The OXO transmitter is a QRP HF transmitter, which means that it produces a very low output power. This makes it ideal for making short-range contacts with other amateur radio operators. The OXO transmitter can also be used for experimentation and learning about radio electronics.

OXO QRP HF Transmitter

TL071 Audio Compressor Circuit

The TL071 operational amplifier makes an excellent foundation for DIY audio compressor circuits. This single-supply design TL071 Audio Compressor offers reliable dynamic range control for musical instruments and recording applications.

TL071 Audio Compressor Circuit: