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Jaycar electronics offers electronic kits, components, semiconductors, enclosures, batteries, PMR, transceivers, UHF CB Antennas

The Cuyahoga Amateur Radio Society (CARS) is a not-for-profit organization comprised of Amateur Radio (Ham Radio) operators dedicated to furthering the art of Ham Radio and to serving the public in times of disaster

PTT and souncard interface for the kenwood TM255 and TM455

Local amateur radio clubs often serve as vital hubs for hams to connect, share knowledge, and participate in group activities. The Orleans County Amateur Radio Club (OCARC), operating under the callsign WA2DQL, provides a focal point for amateur radio operators in Albion, New York, and the surrounding Orleans County area. These organizations frequently host events, offer technical assistance, and foster camaraderie among members, supporting various aspects of the hobby from contesting to emergency communications. OCARC's activities include discussions on proposed Technician class privileges for **80, 40, and 15 meters**, indicating an interest in regulatory changes affecting entry-level licensees. The club also promotes the use of online tools like _Radio Mobile Online_ for antenna pattern analysis and _VOACAP Online_ for propagation predictions, aiding members in optimizing their station performance. Furthermore, OCARC highlights participation in _Parks On The Air_ (POTA) events, such as the Erie Canal Bicentennial Celebration in 2025, encouraging outdoor operations and public engagement with amateur radio.

This page describes how to set up RaspBerry Pi Linux system with already configured AX.25 softwares on SD or micro SD cards

Personal Blog devoted to ham radio topics, amateur radio issues, social impact of ham radio and opinion.

Qsl card printing, filling, distribution. complete qsl service from Bulgaria

The Buddipole Deluxe, a portable HF/VHF antenna system, receives a practical assessment from IW5EDI after a month of field use. The author, constrained by antenna restrictions, highlights the system's crucial role in enabling portable operations, even managing sporadic digital activity from a balcony. Direct comparisons to a fixed 3-band dipole reveal surprisingly comparable signal reports on 15, 17, and 20 meters, underscoring the Buddipole's effectiveness in real-world scenarios. Tuning the Buddipole proves straightforward on bands down to 20 meters, though the review notes significant challenges with SWR on lower bands like 40 meters, where achieving better than 3:1 SWR was problematic. Observations also include SWR variations with dipole rotation and mast height, suggesting environmental factors play a role. The overall manufacturing quality of the antenna and its accessories, including the tripod and carry bag, is deemed good, despite a minor issue with a pole connector. Looking ahead, the author plans to construct a homemade Buddipole version, possibly optimized for the 30-meter band, specifically for PSK31 operations from an apartment. This personal project reflects a common amateur radio practice of adapting commercial designs for specific needs, further extending the utility of portable antenna concepts.

This is the downloads area for slides, plans and handouts for CARS Amateur Radio Licence Training Courses

QSL Cards from the past, ham radio QSL Card collection by W8JYZ

This handy and cheap portable dipole can be folded and backpacked, carried in use, and adjusted to a very wide range of frequencies.

The Japan Amateur Radio League (JARL) outlines the application process for foreign amateur radio operators seeking to establish a station in Japan. Required documentation includes a completed JARL-96-04 station information form, a signed JARL-04-09A Letter of Authorization, photocopies of the current amateur radio operator certificate, passport or Residence Card, and proof of bank transfer or PayPal payment. Applications must be submitted at least 60 days prior to the desired operation start date to the JARL International Section in Tokyo. Licensing information specifies eligibility for those with valid amateur qualifications listed in Annex 1, regardless of nationality. A portable/mobile 50W station license is recommended for nationwide operation, costing JPY 2,750. Fixed station licenses for output power exceeding 50W but not more than 200W cost JPY 5,400. Licenses are granted for the authorized stay period, up to five years, and are renewable for JPY 1,700. Operations exceeding 200W require a different procedure involving direct submission to the Ministry of Internal Affairs and Communications (MIC) and an on-site inspection. Radios without a 'Technical Standard Certification Number' require assurance by JARD, incurring a JPY 5,500 fee for the first radio and JPY 1,100 for each additional unit. Payment options include bank transfer to MUFG Bank, Ltd., Komagome Branch, or PayPal. The document also details guest operation rules, allowing validly licensed foreign amateurs to operate local stations under specific conditions, including host presence and identification with the host's callsign followed by their own.

Applied instruments manufactures test and measurement equipment for the broadband telecommunications industry. products include carrier generators, signal level meters, rf switches, spectrum analyzers and a return alignment system.

Make and automatic antenna tuner based on Arduino and using economic card. This ATU Project can be installed outdoors and controlled remotely by an rs485 link

The KnightLites QRP Association is a world wide fellowship of low power (QRP) amateur radio communications enthusiasts founded in 1996, and is coordinated through the efforts of a small group of radio amateurs located in the Research Triangle region of North Carolina in the United States.

The Araucaria DX Group, based in Brazil, functions as an amateur radio club specializing in **DXpeditions**, **contesting**, and organizing various related events. The group actively sponsors contests and provides resources for DX enthusiasts. Its primary focus is on facilitating and participating in long-distance radio contacts and competitive operating events, contributing to the global amateur radio community. The group's activities include coordinating expeditions to rare DX entities, participating in major international contests, and fostering skill development among its members. By sponsoring events, the Araucaria DX Group supports the growth of amateur radio in South America, encouraging participation in competitive operating and promoting the pursuit of DX. The group's initiatives aim to enhance operational proficiency and expand the reach of amateur radio communications.

October 2003 QST article on working digital mondes with sound card interfaces

This webpage allows you to create custom QSL cards (confirmation of radio contact) as PDFs for printing. You can personalize them with images and information. The cards are standard size (5.5" x 3.5") but can be adjusted slightly for easier printing on regular paper. You'll need Adobe Acrobat Reader to view the PDFs. There's also an option to create a free account to save your information for future cards.

The web site of RW3AG, Vlad Plugin in Moscow, Russia. Ruussia links and other information.

Designing your own QSL card is now easier than ever. This is a Program that helps you design and then Print your QSL cards filling them automatically with QSO data.

KD5FX, 20 through 6 meters, QRP to full legal power, lightweight, easy to carry

C.A.R.L.A. is a growing network of repeaters providing coverage across Northern & Central California and Western Nevada. It is intended to be used as a reliable communications resource during significant local, regional and wide area incidents, and is open to all licensed amateur radio operators

Connecting and configurig an USB Sound Card key to the raspberry Pi to allow digital mode decoding and remote rig applications

A funny online application that lets you build your own QSL cards based on templates. You can choose background text aligment and text to be printed on your card.

The Peekskill / Cortlandt Amateur Radio Association, Inc. (PCARA) is a Volunteer Non-Profit Community Service Organization Serving the Greater Peekskill / Cortlandt Area of Westchester and Putnam Counties in New York State. PCARA operates three voice repeaters in the Northern Westchester / Southern Putnam County region of New York State.

Located in Johnson City, Tennessee - Washington County EM86.

The _Sci.Electronics FAQ: Repair: RFI/EMI Info_ document, authored by Daniel 9V1ZV, provides a detailed analysis of computer-generated RFI/EMI, focusing on its impact on radio reception. It identifies common RFI sources such as CPU clock rates (e.g., 4.77 MHz to 80 MHz), video card oscillators (e.g., 14.316 MHz), and even keyboard microprocessors, all of which generate square-wave harmonics across HF and L-VHF regions. The resource outlines a systematic procedure for pinpointing RFI origins, including disconnecting peripherals and using a portable AM/SW receiver with a ferrite rod antenna to localize strong interference sources. The document categorizes RFI mitigation into shielding, filtering, and design problems, offering practical solutions for each. It recommends applying conductive sprays like _EMI-LAC_ or _EMV-LACK_ to plastic casings of radios, monitors, and CPUs to create effective Faraday cages, emphasizing proper grounding and avoiding short circuits. For filtering, the guide suggests using line filters, ferrite beads, and toroids on power and data lines, and small value capacitors (e.g., 0.01 uF for serial/parallel, 100 pF for video) to shunt RFI to ground. It also discusses the use of bandpass, high-pass, low-pass, and notch filters on the receiver front-end or antenna feed to combat specific in-band noise.

Platinum coast amateur radio society (pcars) w4mlb - melbourne florida, pcars provides hf, vhf, and uhf communications for any police fire and rescue emergency

Non-profit public foundation dedicated to providing research and educational access to optical and radio astronomy. Located in Rosman, North Carolina.

Soldering PL-259 Coax Connectors

SCARA is located in Siskiyou County, CA. Features information on club events, meetings, and membership.

The Dilawri Cardiovascular Institute (DCI) is a prominent Canadian organization dedicated to advancing cardiovascular health through cutting-edge research, equitable patient care, and medical innovation. It integrates 16 core centers, including specialized units like the Centre for AI, Data Science, and Imaging, and the Centre for Heart Rhythm, to bridge research findings directly into clinical practice. Their mission emphasizes providing world-class cardiac care accessible to all patients, regardless of their geographic location, by employing disruptive innovation and creative strategies to reach individuals faster. The institute focuses on a team-based approach, ensuring patients receive the correct therapy at the optimal time for long-term well-being. DCI's commitment extends to continuous growth through education, pushing boundaries beyond standard care, and fostering a respectful, inclusive environment for both staff and patients. They lead industry collaborations to shape the detection, treatment, and management of heart disease.

This website is made available to the CCARC Hamradio Community and to anyone interested in Amateur Radio.

The Mobileer group is for California Amateur Radio (Ham) operators to discuss family mobile radio caravan and camping trips.

Demonstrates the _RoMac Automatic CW Identifier 2012_ software, a Windows application designed to automate station identification and provide a tuning pulser. It can send CW identification via a sound card's audio output or by keying a radio's manual CW jack using a serial port's DTR line. The software also supports CAT commands for various Kenwood, Yaesu, Flex, and Elecraft radios, enabling automatic mode and frequency changes for ID transmission. It integrates with USB audio-capable radios like the Icom 7300 and Yaesu FT-991, simplifying connectivity with a single USB cable. The application features a fully programmable interface, adjustable CW speed from **5 to 35 WPM**, and ID intervals from **5 to 30 minutes**. The integrated "Pulse Tuner" function allows for safe amplifier and antenna tuner adjustments by sending short audio tones or rapid CW keying, with an adjustable duty cycle from 1% to 100%. It offers compatibility with a wide range of transceivers and amplifiers, and a schematic for a basic sound card interface is included for users without existing setups.

The 7-minute, 52-second video, published on December 31, 2016, by TheStingyHam, details several methods for optimizing receive audio on the **Elecraft KX2** QRP transceiver. It specifically addresses challenges encountered on the 40-meter band, a common haunt for QRP operators, while also noting that 15m and 20m operations might benefit from different settings, such as combining the preamp with receive EQ and RF gain adjustments. Key moments highlighted in the video include specific adjustments for noise reduction, filter settings, signal attenuation, and receive equalization. These techniques are demonstrated to help operators extract clearer signals from a noisy band, a critical skill for successful portable operations and DXing with low power. The author, drawing from field experience, suggests that while the tips are primarily aimed at 40m, the underlying principles of careful audio and RF gain management are broadly applicable across the HF spectrum, enhancing the overall QRP operating experience.

Forget about spending expensive time and big money for QSL cards printing, filling out, sorting and sending. Exchange QSL information system.

Investigates the legal framework surrounding **pneumatic antenna launchers** in Victoria, Australia, specifically their classification under the Firearms Act 1996. The author, VK3KBC, details how these devices, designed to discharge a projectile by compressed air, are defined as 'firearms' and subsequently categorized as **Category E Longarms**. This classification carries significant penalties for unregistered possession or use, with the author noting the lack of provisions for amateur radio operators to legally possess and use such devices for antenna deployment. The author shares personal experiences needing such devices for portable HF radio operations, contrasting them with previously legal slingshots and current alternatives like kites or bow and arrow. VK3KBC outlines efforts to advocate for legislative change, including submissions to the Wireless Institute of Australia (WIA) and the Victorian Department of Justice, proposing an amendment to Section 3(i) of the Firearms Act 1996 to include amateur radio field operations as an exempted use. The resource also reviews the original intent of the Category E firearm classification, suggesting that pneumatic antenna launchers may have been assigned this category in the absence of a more suitable alternative.

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.

Some modifications for the Tigertronics Signalink USB sound card radio interface

MF TeleType is a program for amateur radio digital communication via sound card, ham radio chat program for extra reliable text transmissions over long distance

The South Canadian Amateur Radio Society (SCARS) is known throughout Cleveland County, Oklahoma

QSL Printer shop, products include Photo QSL cards, Eyeball cards, and State QSL Cards, based in Hampstead, MD USA

Demonstrates the complete process of setting up a _HamClock_ for an amateur radio shack, utilizing a Raspberry Pi and the HamClock 4.21 software. The guide meticulously covers hardware recommendations, including specific Raspberry Pi models like the Pi 4, suitable SD cards, power supplies, and display options. It provides step-by-step instructions for preparing the SD card with Raspberry Pi OS, performing initial system updates, and executing the HamClock installation script. Detailed configuration steps are outlined for HamClock's seven setup pages, addressing callsign, grid square, DX Cluster settings (e.g., `dxspider.co.uk` port **7300**), map centering, and crucial features like automatic space weather map rotation and auto-upgrades. The resource further explains how to customize HamClock's display panels, such as replacing default panels with a large DX Cluster display or a dedicated Space Weather panel. It illustrates configuring the Live Spots panel to show _PSKReporter_ data, filtering spots by grid square and time (e.g., **15 minutes**), and selecting specific bands for monitoring. The author, G6NHU, shares personal preferences for map types, recommending the DRAP style with Robinson projection for optimal amateur radio utility. Additionally, the guide provides specific DX Cluster filtering commands to manage spot overload, including methods to exclude data modes like FT8 and FT4, ensuring a cleaner display of relevant DX activity.

Generating clean PSK signals and helping others to correctly tune their souncard output, as well as giving proper RSQ reports by identifying signal quality by N1NKM.

The C.A.R.E.N. Club is one of the oldest amateur radio clubs in Arkansas, dating back to the late 1950s. Just as the name implies, the C.A.R.E.N. Club is the state leader in emergency communications, SKYWARN, Amateur Radio Emergency Service (ARES), Radio Amateur Civil Emergency Service (RACES).

Hams or amateur radio operators and CB operators usually cannot have ideal grounds, but with some care and planning they can have nearly perfect systems

A MT Hell dos transmitting program by DF6NM

The purpose of this web page is to try to investigate some of the issues around ICOM IC-746PRO reported by many radio amateurs through out the world; and unfortunately not properly taken care of by ICOM.