Search results

DX-Summit, is one of the very first **DX Clusters** on the internet,operated by the OH9W OH2AQ Radio Club, offering today a full featured web-based DX cluster, with real-time and even historical DX spots across basically the whole spectrum of amateur radio bands. This web application aggregates **DX spots**, enabling hams to monitor DX activity on frequencies from 1.8 MHz through 47 GHz, including specialized categories like beacons, digital modes, IOTA, QRP, and satellite operations. As all DX Clusters, it is as a critical tool for DXers and contesters seeking current propagation conditions and DX stations activity. The web application utility extends to providing daily DX news (even if not up to date) and a spot search function, allowing hams to research previous activity of a specific call signs on several bands. Features integration with direct link to **VOACAP** predictions, QRZ.com and ClubLog. Access to the service during contest events, expecially the most popular ones, may make the sevice overloaded. The inclusion of a full featured tutorial enhances its value. DX Summit's long-standing operation, maintained by **OH8X**, underscores its reliability as a go-to resource for seeking amateur radio spots and identifying rare DX or unidentified signals.

A 2 meter (146 Mhz) J-Pole antenna that is inexpensive, and easy to build.

Constructing a 2.4 GHz high-gain _cantenna_ for wireless networks is detailed, providing a practical approach to extending WiFi range. The author, WB8ERJ, shares insights into building these devices, noting their application in amateur radio for projects like Hinternet or HSMM (High-Speed Multimedia) networks. The article outlines the necessary components and steps, emphasizing the DIY aspect for hams interested in digital modes and local area networking. The resource explains how to determine the correct probe placement within the can, a critical dimension for optimal performance at 2.4 GHz. It references specific measurements, such as the 1.25-inch distance from the can's bottom, derived from calculations for the 2.4 GHz band. This precision ensures the antenna functions effectively for its intended purpose of signal amplification. Readers gain actionable knowledge for fabricating a functional antenna from common materials, suitable for experimentation or practical deployment in a ham shack or field environment. The focus remains on the hands-on construction and the measurable results of improved signal strength.

2 Meter Antenna for Bicycle Mobile Operation

The project details a DIY SWR/Wattmeter designed around an _Arduino Uno_ shield, providing capabilities to measure RF power from 2 to **200 watts** and Standing Wave Ratio (SWR) for HF amateur radio bands. This construction features a compact design, integrating the measurement circuitry directly onto a custom PCB that interfaces with the Arduino Uno microcontroller. Key components include a directional coupler for sensing forward and reflected power, precision rectifiers, and analog-to-digital conversion for processing RF signals. The Arduino firmware handles calibration, calculations, and displays the results on an integrated LCD, offering real-time feedback on antenna system performance. The design prioritizes simplicity for homebrewers. Performance specifications indicate accurate readings within the **2-200W** power range, suitable for typical QRP to medium-power HF operations. The project provides schematics and a basic overview of the software logic.

Setting up the Arduino DUE to run as an SDR software defined radio

Here is a 70cm (440 Mhz) J-Pole antenna that is inexpensive, and easy to build. Author use 1/2 inch copper pipe, and the associated fittings necessary. The dimensions aren't typical however, this is what it took to get its SWR low.

How to build a beverage antenna. How to deploy a BOG antenna for your next SWL DX-ing activity. Give it a try and follow the orientation tips for this bi-directional antenna.

This free software is useful for visualizing terrain and performing Longley-Rice path loss and coverage prediction using the Irregular Terrain Model. A Windows port of the Linux-based SPLAT by John Magliacane.

Demonstrates BBLogger, a **freeware** logging application designed for both amateur radio operators and Short Wave Listeners (SWLs). Developed by IK2VIW, IZ2BKT, and IK2UVR, this software provides comprehensive station management capabilities, including **CAT control** for various transceivers, integration with digital mode software like WSJT-X, JTDX, and MSHV, and robust QSL management features. The application supports a wide array of functions such as DX cluster interfacing, mapping, awards tracking (including custom awards), and direct integration with services like LoTW, eQSL.cc, and ClubLog for QSL confirmations and OQRS requests. It also includes utilities for ADIF to CSV conversion and vice-versa, catering to diverse logging and data management needs. Recent updates, such as version 13.1, introduce a web server for log management from any device, allowing remote access and control. The software has improved ADIF import capabilities, including time settings for duplicate QSO detection, and enhanced filtering options for log searches. Performance improvements include faster automatic updates and manager database synchronization, along with optimized log checking at startup. Earlier versions added support for FT8 and FT4 modes, refined OQRS integration with ClubLog, and expanded QSL/label printing functionalities, enabling users to select specific callsign types (OM, SWL) for printing. The developers emphasize compatibility with Windows 10/11 for full functionality, noting limitations when running on older operating systems like Windows 7 due to modern security protocol requirements.

Build your own cobweb antenna followning M0MRR instructions and notes

A reversable quad antenna for 40 meters band by N4JTE

A shortened and invisible wire antenna for 7 MHz

An HF QRP CW RTX built around the Arduino open-source electronics prototyping platform

Amateur Radio experience, blog from Florence Italy

Open source Arduino based CW (Morse Code) keyer with a lot of features and flexibility, often rivaling commercial keyers.

A homebrew project for a 2 meter 4 element yagi beam antenna by 2E0HTS

A 2-meter Turnstile antenna, detailed for amateur satellite communication, offers a straightforward build for those looking to engage with orbiting transponders. The author, WB8ERJ, shares his personal design and construction methods, emphasizing the antenna's simplicity and effectiveness for LEO (Low Earth Orbit) satellite work. This design provides a circularly polarized signal, crucial for mitigating _Faraday rotation_ and signal fading often encountered with linearly polarized antennas when tracking satellites. Construction involves readily available materials like PVC pipe and copper wire, making it an accessible project for many hams. The article includes practical advice on element spacing and feed point considerations, drawing from the author's hands-on experience in the shack and field. It highlights the antenna's utility for receiving signals from various amateur satellites, including the popular AO-91 and AO-92. The Turnstile's inherent omnidirectional pattern in the horizontal plane, combined with its circular polarization, yields consistent signal reception, often resulting in **stronger decodes** and **more reliable contacts** compared to basic dipoles or verticals.

The IK-STIC 2 is a vertical, all band, antenna that is over 25 feet tall yet weighs under 5 pounds. Based on a telescopic pipe or a fiberglass fishing pole, using a tuner it can easily cover the amateur radio HF bands from 40 - 10 Meters

G0KYA slim jim antenna for 10 meters band

Online log for FT5GA - Glorieuses Isl. 2009 ham radio dx pedition

An cheap homemade azimuth and elevation rotation system using an Arduino/AVR.

An interesting rotator interface that interfaces a pc to a rotor or rotator controller, emulating a Yaesu GS-232A/B and Easycom protocols, made with Arduino

Get the most out of the shortwave listening hobby. Follow these steps to get started with your new radio.

A multiband end-fed antenna that cover 3.5 to 30 Mhz using a 1:64 Balun based on a FT240-43 core

A simple to build Yagi 2 element antenna for 15 or 20 meters band by 9m2mso

This blog is about utility and military monitoring in the HF/VHF/UHF range.

An home made 70 cm colinear antenna at M1KTA blog

An homebrew project for a 3 elements yagi monoband antenna for the 20 meters by 9M2MSO

PA11019 Travel loop antennas, these antennas cover 6.300 to 29.200 mHz , handle 35 Watts and have a packing size of 43 cm, ideal for fieldwork, or mobile operations.

A homebrew project for a multiband end-fed antenna made with a single FT140-43 and 50pf capacitor and 20 meters of wire.

A 144 MHz six element yagi beam antenna plan

Radio scanner frequencies for nsw

pictures of a 80 mt band EH antenna by YC5NBX

An experimental fractal Quad antenna for 10 meter band project by AG1LE

How to extend your Wireless Network by building a 2.4 gHz wifi cantenna

Video construction of a multiband HF trapped dipole antenna based on a variation of the classic W3DZZ design

Simple DIY stealth apartment antenna for 20m and 40m. It is basically a ZigZag quarter wave dipole antenna

A quarter-wave vertical antenna design for HF operation offers a practical solution for radio amateurs seeking a compact and efficient multi-band radiator. This project details the construction of a 5-band HF vertical, drawing inspiration from established commercial products such as the _DX COMMANDER_ and the MV6. The design emphasizes ease of assembly and disassembly, making it suitable for portable operations or installations with limited space. The article provides insights into various construction methods and offers practical tips for building a robust yet lightweight antenna. It highlights the benefits of a vertical configuration for DX contacts, particularly on the lower HF bands, and discusses real-world performance observations. The antenna is designed to cover multiple HF bands, providing versatility for various operating scenarios. Operators can achieve significant DX results with this type of antenna, often comparable to more complex arrays, especially when deployed with an effective ground system. The project aims to empower hams to build a capable antenna without significant financial outlay.

Simple Homebrew HAM blog from indonesia

This halo antenna was built to have an omnidirectional coverage while working in VHF contests.

Homebrew a 2 meter 1/4 wave vertical antenna for the 146 mHz ham radio band

FT5ZM Log Online

Run an oscilloscope under your Android phone

A vertical half-moxon for the 7 Mhz by F6IRF

The Fan dipole antenna offer a easy to setup and efficient HF multiband antenna that does not require tuners or antenna switches, diagram by YC8PVU.

This is an attempt to build an Antenna rotator controller using Arduino Mega 2560 with a nice user interface showing the actual position of the antenna.

80 meter vertical experiment by Bob Raynor N4JTE

If the display lamps in your TS-2000 go out. They can be replaced with LEDs.

A complete list on Long Beach Frequencies. Long Beach Police Penal Codes, and Police 10 Codes