Mother Lode DX Contest Club
The Mother Lode DX / Contest Club welcomes all interested DXers and contesting fans, both casual and rabid, from throughout the Mother Lode region of California
Efficient 2-Element Quad Antenna for 2m
Antennas/Quad
A detailed guide presents a simple 2-element quad antenna for 2m, offering ease of construction, portability, and efficient performance across the 144-148 MHz band. The design allows quick disassembly for storage and features adjustable polarization, making it ideal for various applications, including transmitter hunting and SSB operations.
ARRL is New Publisher of Gordon West, WB6NOA
Download Press Release (PDF) ARRL The National Association for Amateur Radio® has become the new publisher of the Amateur Radio License Preparation books and related resources authored by Gordon West, WB6NOA. Gordon West’s popular books, classes, and audio courses have been a mainstay of amateur radio licensing for over 40 years. Generations of hams have learned from ‘Gordo’, and now the impact...
50 MHz 300W Power Amplifier
Technical Reference/Amplifiers/VHF Amplifiers
This project addresses the need for a 50 MHz Amplifier providing substantial power for Australian "Advanced Licensees" permitted to use 400W PEP in the 52-54 MHz band. In regions limited to 100W PEP due to TV channel usage, this initiative aims to enhance power output for transceivers with lower capabilities on the 6m band.
Propagation on 630 Meters and 2200 Meters
Propagation/Resources
This is a theoretical look at propagation on 630-Meters and 2200-Meters using ray tracing software. It expands on the brief discussion in the ARRL Handbooks.
The Earth's magnetic field affects 630-Meter and 2200-Meter band propagation. Lower ionization reduces absorption, aiding low-frequency propagation. Differences exist between bands, limited daytime sky-wave propagation. Sunrise/sunset show promise, yet mechanisms are unclear. Ducting possible at night in specific conditions. Negative ions enhance propagation. Inefficient antennas and high man-made noise are anticipated. Groundwave propagation is significant on 2200-Meters.
TX5S Clipperton 2024
DX Resources/DX Peditions/2024 DXpeditions
TX5S DXPedition to Clipperton Island 2024
Athens Co. Ohio Amateur Radio Association
N1FD Nashua Area Radio Society
Ham Radio/Clubs/North America/USA/New Hampshire
The Nashua Area Radio Society is a group of New England Ham Radio enthusiasts with a wide range of interests. Amherst, NH.
IARU Region 2 BandPlan
Ham Radio/Band Plans
The IARU Region 2 has established this voluntary band plan to better organize the use of our bands efficiently. To the extent possible, this band plan is harmonized with those of the other regions.
VHF Repeater with a Raspberry Pi
Technical Reference/Raspberry Pi
Creating a 2m Fm Repeater with a Raspberry Pi (B) and a RTL dongle.
Top Amateur Radio Websites - Issue 2402
Enhancing Performance with W8JK/MOXON Antenna Variant, 40m QRO End Fed Half Wave Antenna Coupler, 40 MHz 8m Band Amateur Radio Exploration, Unearthing VHF Contest Secrets: An In-Depth Analysis, QRP Balun: A DIY Project , 70Mhz (4 metre) Delta Loop Antenna, Yaesu VR-120 Memory Manager,
Field-Tested VP2E Antenna
Antennas/Dipole
The author explores the VP2E antenna, introduced by Ed Durrant DD5LP, for Portable Operations on the Air (POTA). Detailing its unique design, successful trials, and an unexpected propagation twist, the VP2E proves a promising addition to the author's portable antenna arsenal.
ARRL Audio News January 12, 2024
ARRL Audio News January 12, 2024
ARRL Kids Day a Success in Nebraska
The Bellevue Amateur Radio Club and the Science Club at Yates Illuminates teamed up to offer the youth in Omaha, Nebraska, with an opportunity to get on the air for ARRL Kids Day. The event occurred on Saturday, January 6, 2024, at Yates Illuminates, a former elementary school that is now a culture and community center. Amateur radio operators Dudley Allen, KD0NMD; Terry Gampper, N0BXQ; Frank Jo...
2024 Orlando HamCation Awards
The HamCation® Awards committee has announced the 2024 Orlando HamCation recipients of the Carole Perry Educator of the Year and the Gordon West Ambassador of the Year awards. Both awards will be presented at the 2024 Orlando HamCation, which is hosting this year's ARRL Florida State Convention, on February 9 - 11, 2024. Lewis Malchick, N2RQ, is the recipient of this year's Carole Perry Educator...
LoRa APRS Tracker or Igate on 433Mhz
Technical Reference/LoRa and LoRaWan
Setting up a Lora APRS tracker using the ESP32 Lora32 TTGO-T T-Beam 433/470Mhz Module.
ARRL Responds to FCC Proposals
ARRL The National Association for Amateur Radio® responded to the Federal Communications Commission’s (FCC) request for comments on removing the symbol (baud) rate restrictions that apply to data communications on the LF bands and the VHF and UHF bands below 450 MHz. The FCC also requested comments on the bandwidth limits applicable to those bands. The FCC’s action follows their 2023 decision t...
3 Band Mono Loop Portable Quad
Antennas/Quad
Handmade drawing of a 3 bands single loop, portable quad antenna used by the author during his dx pedition in Kenya as 5H3FM. This antenna is done using 3 telescopic spreaders and the spreader kit for 1 element quad by spiderbeam.
“Marty on the Mountain” Engstrom, N1ARY (SK)
Avid radio amateur, Marty Engstrom, N1ARY, of Fryeburg, Maine, has become a silent key. Generations of New England television viewers may know him as Marty on the Mountain from his weather reports on camera for WMTW-TV from the station’s transmitter site on Mount Washington in Gorham, New Hampshire. Engstrom was known to quip that he was not intentionally in the weather business: “I’m a TV engin...
DIY Tree Antenna Launching: Cheap and Effective
Technical Reference/Antenna Launcher
This article explores budget-friendly methods for launching wire antennas into trees, comparing common options like slingshots and professional arborist tools. The author introduces a simple and cost-effective DIY approach using latex balloons, sand, and readily available materials for efficient antenna deployment in the field
OpenRTX
Operating Modes/Digital Modes
OpenRTX is a free and open source firmware for digital ham radios. The firmware is designed with a top-down approach with the objectives of modularity, flexibility and high performance. Currently, it targets some Tytera Radioddity Baofeng digital radios
K5ZRO Vicksburg Amateur Radio Club
Our purpose is to further the hobby of Amateur Radio and to benefit the community with our communications expertise in times of need.
Wire on the Ground: Portable Radio Success with Grasswire Antenna
Antennas/Wire
The author shares a unique experiment with a 200ft Grasswire antenna—laying wire directly on the ground. Despite inherent losses, the setup enables successful radio communication with a Kentucky station, highlighting the antenna's practicality for portable use with minimal power.
Python Telegram bot for QRZ.com lookups
Software/Developer Resources
This is a Telegram bot written in Python that does ham radio call sign lookups via QRZ.com. This bot requires a paid QRZ.com account with XML access, in order to use the QRZ.com lookup feature of this bot
a token for a Telegram bot
Moxon Mania - Building the Ultimate 4-Band Moxon Antenna
Antennas/Moxon
The article details the design and construction of a four-band Moxon beam by a radio amateur. The beam, mounted atop a rooftop tower, aimed for gain over a dipole on 20 meters, cost under $500, and included additional bands. The design features fiberglass spreaders, four bands (20/15/10/6 meters), and a single feedpoint. The construction involved computer modeling, NEC source code, and specific dimensions. The article outlines the assembly, materials, and tuning process, including in-situ adjustments for optimal performance. Despite initial challenges, the beam improved signal strength and facilitated contacts on multiple bands, marking it as the best HF antenna the author has owned.
Top Amateur Radio Websites - Issue 2401
USB-C charging for Handheld Radio Transceivers, TEFV Terminated End Fed Vee Antenna, Choosing the Right Aluminum Stock for Antenna Building, SNASharp, DIY 1KW Dummy Load, Skywave Linux, Analyzing SSB Signal Quality in CQ WW Contest, Arduino Iambic Keyer
ARRL Audio News January 5, 2024
ARRL Audio News January 5, 2024
ARRL Kids Day in on January 6!
Twice a year, ARRL offers an event designed to promote amateur radio to youth. On ARRL Kids Day, which will be held this year on January 6, 2024, you can share the excitement with your own kids, grandkids, a Scout troop, a church, or the general public! ARRL Kids Day is designed to give on-the-air experience to young people and to foster interest in getting a license of their own.. It is also i...
HamSCI 2024 Workshop
Ham Radio Science Citizen Investigation (HamSCI) will hold its sixth annual workshop on March 22 - 23, 2024, at Case Western Reserve University in Cleveland, Ohio. The event is meant to bring together the amateur radio community and professional scientists. The 2024 workshop's theme will be "Alignments" - specifically those between the Sun, Moon, and Earth; collegiate amateur radio recreation an...
G7SYW
Personal amateur radio pages, software for use with ham radio, QSL cards online
LoRa in Amateur Radio
Technical Reference/LoRa and LoRaWan
About LoRa, wireless communication technology designed to transmit data over long distances. LoRa provides a means for wireless data transmission over long distances with low power consumption. Practical applications of LoRa in amateur radio
Online LInked Dipole Designer
Antennas/Antenna Calculators
The page for designing linked dipole antennas allows users to swiftly create a versatile multi-band antenna suitable for portable applications in outdoor settings, such as in the field or on mountain tops.
Receiving NOAA Weather Satellite Images
Operating Modes/Satellites/Weather Satellite
Receiving NOAA weather satellite images using a Raspberry PI with a RTL dongle and a Turnstile crossed dipole automatically.
WSJT-X 2.7.0 Release Candidate 3 available
WSJT-X 2.7.0 Release Candidate 3 has been officially made available to the public. This RC version implements some new features and several bug fixes.
How to use AI to identify Radio signals
Technical Reference/AI Ham Radio
How to use AI (Artificial Intelligence) to identify Radio signals using a RTL SDR dongle and Linux (Ubuntu). This solution implement a framework using Keras and TensorFlow to learn and recognize the RF signals.
|
