Slow Scan Television is a method of transmitting still images over radio using audio frequency tones. The term “slow scan” distinguishes it from conventional fast-scan television (like broadcast TV), which requires much wider bandwidth.
Tag: Amateur Radio Projects
Explore a collection of amateur radio projects including DIY antennas, HF transmitters, receivers, and practical ham radio experiments. Find step-by-step guides, circuit ideas, and weekend builds for radio enthusiasts, makers, and ham operators looking to learn and build their own equipment
Reverse Beacon Network: The Ultimate Guide for Ham Radio Operators
The Reverse Beacon Network represents one of the most significant technological advances in amateur radio during the past two decades. By providing instant, objective feedback about your transmissions, the system empowers operators to understand their stations better, optimize their performance, and make informed decisions about when and where to operate. Whether you are testing a new antenna, chasing DX, competing in contests, or simply exploring the bands, the RBN adds a dimension of awareness that was previously impossible.
94-Foot Multi Band Doublet Antenna – Simple All-Band HF Wire antenna
If you could only ever hang one wire in your backyard for the rest of your life, the 94-foot Doublet would likely be it. Often called the “all-bander’s dream,” this specific length is a classic in the Amateur Radio world for a reason: it’s short enough to fit in most yards, yet long enough to be highly efficient on the 80-meter band.
Unlike a standard dipole that’s stuck on one frequency, the Doublet uses balanced ladder line to turn your entire feed system into part of the antenna. In this guide, we’ll look at why the 94-foot length is the “sweet spot” for multiband performance and how to properly interface it with your tuner. Forget complex traps and multiple dipoles—one wire can truly do it all. Let’s get that ladder line hanging!
Near Vertical Incidence Skywave (NVIS): The Definitive Guide to Reliable Regional HF Radio
This article will give you a complete understanding of NVIS propagation. With the level of technical expertise and detail found in this article, this guide is intended for the amateur radio operator who wants to go beyond the theory and learn the details of NVIS antenna design and operations.
Evolution of the ATS Mini: A Technical Deep Dive into V1 through V4
The ATS Mini series represents one of the most innovative developments in pocket-sized DSP receivers for shortwave enthusiasts and ham radio operators. Built around the Silicon Labs SI4732 DSP chip and ESP32 microcontroller, these tiny radios pack remarkable functionality into an incredibly compact form factor. Let’s explore the technical evolution across all versions, from the original V1 to the latest V4. Built around the Si4732 chip and powered by an ESP32, each iteration has addressed hardware bottlenecks, from audio quality to RF interference
Building the LARCSet v3.0: Real-World Problems and Proven Fixes from the BITX20 Community
Troubleshooting guide for the LARCSet V3.0 40 m SSB/CW transceiver kit covering common failures, low mic gain, tuning issues, and PA faults. Community-proven fixes and mods from BITX20 builders improve stability, audio, and output power.
Building Sovina 40M Class E CW Transmitter with BS170 MOSFETs
Build the Sovina 40 m Class-E CW transmitter using BS170 MOSFETs and 74HC02 logic for efficient 7 MHz QRP operation. High-efficiency switching PA delivers 4–7 W output with clean RF and simple crystal-controlled design for homebrew HF rigs.
Stacked 5/8-wave VHF Antenna for 146 MHz
Stacked 5/8-wave VHF Antenna for 2-meter band (146 MHz). Learn design theory, dimensions, tuning method, and original YY5RM reference for high gain ham radio
Building a Andy 2E1TAP’s Shortened 40-Meter Delta Loop
Full-size Delta Loops for the 40-meter band normally require around 42 meters of wire—often impossible for operators with limited space. To overcome this challenge, Andy (2E1TAP) documented his attempt at constructing a space-efficient, shortened 40-meter Delta Loop.
Shortened Vertical Antenna for the 80-Meter Band (UR0GT Design)
Compact 4 m shortened vertical antenna for the 80 m band using a 64 µH loading coil and LC base matching network. UR0GT design enables efficient 3.65 MHz operation in small spaces with full-size radial system for strong HF performance.