ARRL Closed Friday, Nov 10, 2023 in Observance of Veteran's Day
ARRL The National Association for Amateur Radio® will be closed on Friday, November 10, 2023 in observance of Veterans Day. There will be no W1AW bulletins or code practice that day. ARRL Headquarters will reopen on Monday, November 13, 2023 at 8:00 am Eastern time.
We are grateful for the sacrifices and service of Veterans.
40 MHz 8m Band Amateur Radio Exploration
Operating Modes/VHF UHF The 8m ISM band, a unique frequency range between 10m and 6m, holds potential for amateur radio enthusiasts, yet it remains largely unallocated. This spectrum offers fertile ground for research and self-training. The author's experience with low-power transmissions and WSPR testing highlights the band's capabilities and the need for a narrow, speech-free amateur allocation to encourage experimentation. Discover the world of 8m ISM radio exploration and its future possibilities.
Yaesu VR-120 Memory Manager
Software/Radio Programming TK120 is an experimental memory management software for Yaesu VR-120 transceiver
QRP Balun: A DIY Project
Antennas/Baluns DIY project of a QRP Balun. Using a high permeability ferrite rod and an old B&W dipole center insulator, he constructs a choke type balun for QRP use. The balun aims to create as much inductance as possible at HF, offering a high impedance to common mode currents
40m QRO End Fed Half Wave Antenna Coupler
Antennas/End-Fed/End Fed Half Wave Antenna A medium power End Fed Half Wave Antenna coupler, specifically tuned to the QRP frequency of 7030 kHz. Constructed from coil stock and capacitors, it achieves an impedance ratio of 64:1. The coupler has proven effective for power ranges from 2 to 100 Watts on the 40m band.
Top Amateur Radio Websites - Issue 2339
Multiband portable wire antennas, 27MHz CB to 50 MHz Amateur Use Conversion, ICOM IC-7610 Rewind , 6m Oblong Loop Antenna, Programming FT-991A, Operating Amateur Radio Overseas, 6m Beacons Report,
W9VMW Cass County Amateur Radio Club
The Cass County Amateur Radio Club is a Non-Profit Organization serving Logansport, Indiana 46947. The CCARC participates in ARES Nets, Skywarn Nets and Field Day and has 2m repeaters at 147.18 MHz, 145.23 MHz, and 145.35 MHz and a 70cm repeater at 443.65 MHz.
DIY 1KW Dummy Load
Technical Reference/Dummy Loads F5NPV explores the construction of a cost-effective 1KW dummy load for radio enthusiasts. Purchasing a commercial dummy load can be expensive, but with basic materials such as a metal can, resistors, mineral oil, and a heat dissipator, you can build your own. The article provides a simple guide to assembling the load, including the importance of testing for inductance. The DIY dummy load yields impressive performance, with an SWR of 1.2:1 across multiple bands and the ability to handle up to 1KW of power. This budget-friendly solution is a valuable addition to any radio shack.
TEFV Terminated End Fed Vee Antenna
Antennas/End-Fed The Terminated End Fed Vee Antenna (TEFV) is a travelling wave antenna with constant current distribution. Unlike traditional resonant antennas, TEFV operates without standing waves, using a terminating resistor for broadband efficiency. With a combination of vertical and horizontal polarization, it offers wide bandwidth from 1.8 MHz to 30 MHz, eliminating the need for a tuner. Key components include a 9:1 unun transformer and a 500-ohm terminating resistor. Grounding and counterpoise enhance performance, and it can handle power losses of up to 30%. TEFV provides an effective, versatile antenna solution for amateur radio and broadcast applications.
Skywave Linux
Software/Linux/Linux Distributions Linux for shortwave and amateur radio monitoring. Supports popular SDR hardware and online streaming from KiwiSDR, WebSDR, and Spyserver sites. Articles about using Linux with your SDR devices.Skywave Linux, an innovative operating system, leverages cutting-edge technology for seamless access to radio signals globally. Ideal for regions with limited internet access, it effortlessly connects to a network of SDR servers, offering high-performance SDR operation without the need for extensive hardware. With pre-installed and configured SDR software, Skywave Linux simplifies signal discovery and operation for all users.
Arduino Iambic Keyer
Technical Reference/Arduino/Morse Code The author recounts their journey in ham radio, including the initial experience with Morse code. Now retired, he has rekindled his interest in ham radio and CW. Here share his project of constructing an Iambic Keyer with Arduino. The project includes a memory keyer and speed adjustment. Additionally, the author provides resources for an Arduino enclosure available on Thingiverse, enhancing the project aesthetics and functionality.
Analyzing SSB Signal Quality in CQ WW Contest
DX Resources/Contest/Resources This article investigates SSB signal quality during the CQ WW 2015 SSB contest. It highlights the importance of adhering to the ideal SSB signal profile, the impacts of intermodulation distortion, and the consequences of poor-quality signals. The analysis underscores the need for well-tuned equipment to ensure cleaner, more efficient signals and, consequently, a more enjoyable and spacious experience for contest participants and amateur radio operators.
ARRL Audio News November 3, 2023
ARRL Audio News November 3, 2023
Amateur Radio Operators Provide Post-Hurricane Communications in Mexico
Radio Amateurs are providing communication services to and from the affected areas in and around Acapulco, Mexico. On the morning of Wednesday, October 25, 165 mile-per-hour winds from Hurricane Otis knocked out all communications and unleashed a nightmare scenario in Acapulco. The area is home to roughly 800,000 people. Radio Club Queretaro member Ruben Navarrete Galvan, XE1EC, told ARRL News...
Great California ShakeOut Drill Reported a Success
Editor's Note: Tuolumne County Amateur Radio and Electronics Society (TCARES) members Rich Combs, KN6HSR; Ned Sudduth, K6NED, and Toni Sudduth, K6TNI reported that the October 2023 Great California ShakeOut exercise was an "outstanding" success. Here is their story as reported to ARRL News: "This is a drill. Drop! Cover! Hold on!" was the mantra for the Great ShakeOut exercise on October 19, 2023...
Veterans Day 2023 Special Events
Special event stations will offer many opportunities for amateur radio operators to honor Veterans and make contacts for Veterans Day. The K1USN Radio Club will be on the air on Saturday, November 11, 2023, to show their appreciation for those who have served in the military. The club station is located at 85 Quincy Avenue in Braintree, Massachusetts. K1USN will be on the HF bands on SSB, CW, an...
Choosing the Right Aluminum Stock for Antenna Building
Antennas/Homebrewing Techniques Building an efficient antenna begins with selecting the right aluminum stock. This article provides a comprehensive guide to sourcing aluminum materials for antenna construction. It covers different aluminum grades, their tensile strengths, tempering options, and their suitability for various antenna components. The article also recommends reputable suppliers in the UK, making it a valuable resource for antenna builders seeking durable and high-performance materials.
Deadline Extended to November 28, 2023 for 60-Meter Comments
The deadline to file comments on the 60-meter band proposal has been extended by the Federal Communications Commission (FCC) to November 28, 2023. Replies to comments will be due December 28, 2023. The public comment period was originally to close October 30, 2023. ARRL The National Association for Amateur Radio® strongly encourages all amateurs to submit comments expressing support to the FCC ...
SNASharp
Software/Vector Network Analyzer SNASharp is a free software application designed to work with scalar network analyzers compatible with NWT software from DL4JAL. It is used to measure and analyze the scattering parameters (S-parameters) of microwave devices. Provide several measurements and analysis tools including Smith chart, Polar plot, S-parameter tables, Transmission line calculator
Top Amateur Radio Websites - Issue 2338
WIFI Remote FUCHS ATU for EndFed Antenna, Yaesu FTdx101D Review, DuinoVox USB interface, HB9CV Antenna for 23 cm, A 6m beam for portable operations, FT-818ND Operating Manual, NZ Amateur Beacons,
USB-C charging for Handheld Radio Transceivers
Technical Reference/Batteries The article highlights the common absence of modern USB-C ports on handheld ham radios and the limited use of USB for power. The author, [jephthai], shares a solution involving a USB-C cable with power negotiation capabilities, allowing the radio to be powered by USB. By splicing Anderson power pole connectors onto the cable, the radio can now be conveniently powered by a USB battery bank, providing a practical alternative to traditional 12 V batteries for off-grid operations.
EFHW Anntenna 40-10 for QRP
Antennas/End-Fed/End Fed Half Wave Antenna The author discusses their endeavour to create a compact, robust resonant antenna for QRP operations due to strong winds in their area. Primarily designed for 40m and 20m bands, the article offers adaptability for different bands. The author hints at future projects, including an extended 8010 EFHW variant, promising a lighter yet efficient design.
ARRL Audio News October 27, 2023
ARR Audio News October 27, 2023
FCC To Vote on Removing Symbol Rate Restrictions
ARRL The National Association for Amateur Radio® welcomes news of a scheduled vote by the Federal Communications Commission (FCC) to consider removing symbol rate restrictions that restrict digital modes, foster inefficient spectrum use, and dampen incentives for innovation. In the draft Commission decision, the FCC would replace the current HF restrictions with a 2.8 kHz bandwidth limit. The ...
How to Engage Youth with Amateur Radio STEM Education
ARRL Education and Learning Manager, and IARU Region 2 Youth Coordinator, Steve Goodgame, K5ATA, gave the keynote address at the 2023 ARRL Pacific Division Ham Radio Convention, also known as Pacificon. Goodgame was a public-school teacher for 21 years. He carries his experience of bringing ham radio into the classroom into his role at ARRL. "It is safe to say I've learned a thing or two about r...
Yaesu FT-891 Go-Box for POTA
Technical Reference/Ham Radio Go Kits This article documents the author's latest go-box build for outdoor ham radio operations using a Yaesu FT-891 transceiver. The go-box is constructed from a plastic "50-cal ammo case" and contains various components, including the transceiver, LDG Z11 Pro autotuner, DIY Yaesu FH-2 remote control keypad, and an external battery. The author details the design considerations, the mounting of components inside the box, and addresses issues related to ventilation and cable management. The go-box is geared for CW operations and POTA activations, with further modifications planned for a microphone and DATA jack. This project allows for rugged, environmentally protected outdoor radio operations while maintaining portability.
Arduino Repeater Controller
Technical Reference/Arduino This blog article introduces an updated repeater controller project utilizing the Arduino UNO. It includes a CW identifier, and the ID message can be customized using hex codes. The author offers a Windows command line program for easier message coding and provides a link for download. The controller features three adjustable timers for IDer, Timer-out, and Squelch-tail. The article also mentions the use of an audio switch to control audio levels between the receiver and transmitter. Detailed instructions and code files are available on the author's website for both version 1 and version 2 of the Arduino repeater controller. The project aims to enhance repeater functionality and audio management in ham radio operations.
Stingray Marine Transceiver
Technical Reference/HF Radios Recently, at the Ballarat Hamfest, the author acquired an old Marine transceiver for just $10, charmed by its sturdy construction and waterproofing. Made by Findlay Communications in Sydney, this crystal-controlled transceiver had been dormant but was reinvigorated with minor fixes. A manual was sourced, and further repairs were made, including an ingenious crystal oscillator replacement using an Si5351a controlled by an Arduino. The refurbished radio, complete with a fresh coat of paint and added customizations, is now operational for 160m AM and 30m SSB. A successful and cost-effective restoration.
Hurricane Otis: Amateur Radio Active
Amateur Radio has been activated to serve during Hurricane Otis. In an e-mail, WX4NHC Amateur Radio Assistant Coordinator Julio Ripoll, WD4R, wrote: WX4NHC has been activated today Wednesday October 25th for Hurricane Otis in the east Pacific affecting Mexico.
WX4NHC will be monitoring the Hurricane Watch Net frequency 14.325 MHz and 7.268 MHz depending on propagation. We will also be on the VoI...
Wireless Society of Southern Maine RACES
The WSSM Emergency Communications Team serves the Cumberland County Emergency Management Agency (CCEMA), and the community in general, by providing emergency communications assistance, conducting programs and training, promoting radio knowledge, fraternalism, and individual operating efficiency, and to conduct activities as to advance the general interest and welfare of Amateur Radio as a viable and efficient means of communications support.
RF Choke with Bifilar Windings
Antennas/Feed Lines/Choke This article presents an RF Choke featuring an 11-bifilar turn winding of #14 house wire on a Fair-rite FT240-31 toroid. The choke is enclosed in a 3D-printed case from Thingiverse, though this may pose thermal concerns at higher power levels. With SWR concerns up to 30MHz, the author plans to employ two series chokes at the rig input for improved performance. This choke offers versatility for portable use, with potential mismatch resolution using an antenna tuner. Further testing is anticipated upon the arrival of new cables.
PCM Kestrel HF Transceiver
Technical Reference/Homebrew This article describes an upgrade to the Kestrel transceiver, replacing its LCD display with a 0.91-inch OLED screen for improved sound quality. VFO boards from Denys VK3ZYZ were integrated, particularly a Nano VFO board. The author shares details about the setup and the resulting enhancements, along with images of the modified components. The transceiver is now optimized for various frequencies and operates at a power output of approximately 120 W pep. More information about the boards can be found on the provided website.
DX EXPLORER - Step Into The Amateur Radio World
Ham Radio/Blogs/Europe DX Explorer is a blog tailored to amateur radio enthusiasts, with a special focus on DIY radio equipment. Geared towards beginners, the author shares their learning journey, emphasizing that the thrill of discovery and growth is the essence of this engaging hobby.
Ham Radio And the Art of Bushcraft
Operating Modes/Portable Operations This article explores the marriage of amateur radio and bushcraft, advocating the pleasure of setting up a portable station in nature rather than operating from the confines of a vehicle. The Parks on the Air (POTA) programme is highlighted as a catalyst for outdoor radio activities. The author shares his experiences and techniques, from transporting equipment into the wilderness to setting up shelters and antennas. Knot tying skills and the use of frogs are emphasized for efficiency, and a unique method for launching wire antennas is described. The article emphasizes the synergy between amateur radio and bushcraft skills, enhancing the enjoyment of radio operations in wilderness environments.
International SWL DX Contest 2023
DX Resources/Contest/Contest Rules The international SWL Contest is oen to SWL all over the world. You can use a real radio receiver or a kiwi or web SDR. We have many sponsors who will give nice gift for best listeners of AM radios on SW and MW.
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