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Quartslab has over 30 years of experience in supplying quartz crystals to the international communications market. Our product range includes the supply of quartz crystals in the frequency range 1.5 to 225 MHz in all popular holder types as well as crystal oscillators in DIL8 and DIL14 packages.

Over 100 distinct RF connector types are available from AIR802, including popular UHF series PL-259 plugs and SO-239 sockets, designed for a wide array of coaxial cable dimensions. The company specializes in producing connectors compatible with common amateur radio cables like RG-8, RG-213, and RG-58, ensuring reliable signal integrity for antenna systems and shack interconnections. Their product line extends to various coaxial cable types and pre-made antenna cable assemblies, offering ready-to-deploy solutions for hams. AIR802 also provides custom cable assemblies and pigtails, catering to specific installation requirements for transceivers, tuners, and amplifiers. These pre-fabricated options simplify station setup, reducing the need for field termination of connectors. Michael Bryant is the contact for inquiries regarding their range of RF components, which are essential for building robust and efficient amateur radio stations.

A home made cobweb antenna project made with easy to find parts 2-14 AWG speaker cables which are cut to 1/2 wavelength for each band and junction box with 4:1 Balun

Custom Designed Photo QSL Cards, Full Color stunning designs, High Quality Printing at competitive Prices. US based QSL designer and printer specialized in custom-designed ham QSL cards.

Transmitting operations in the 50-54 MHz range offer some unique problems that over the past 50 years have stymied station owners, forcing them to tolerate quiet hours and hostility from family and neighbors attempting to enjoy other electronic services.

9J2T dx pedition to Zambia 2014 by IDT

A website dedicated to microwave operations and technical projects by AD6IW

_AT Auto_ is an automatic antenna tuner designed for amateur radio enthusiasts seeking efficient and reliable tuning solutions. This device automates the tuning process, allowing operators to focus on communication rather than manual adjustments. The tuner is compatible with a range of transceivers, enhancing its versatility in different shack setups. Its design incorporates advanced circuitry to ensure optimal performance across various bands. The _AT Auto_ tuner is particularly useful for those operating in HF bands, providing seamless transitions between frequencies. Its integration capabilities with other shack automation products make it a valuable component for modern amateur radio stations. The tuner supports multiple modes, including _SSB_ and _CW_, catering to diverse operating preferences. Its robust construction and user-friendly interface contribute to its appeal among both seasoned operators and those new to the hobby. Kessler Engineering's focus on innovation and quality is evident in the _AT Auto_'s design. The tuner is part of a broader product line that includes shack automation solutions, reflecting the company's commitment to enhancing amateur radio operations. Despite the website redesign, the tuner remains a key offering in their product portfolio.

A very compact and multifunctional digital amateur radio station for the radio operation at home, on the way or in the emergency radio implemented with a Raspberry Pi 4, an Elecraft KX2, a Kenwood TH-D74 and a USB GPS.

Technical details of the Drake R-4C receiver

Amateur Radio related activities of HB9EGA

This is a standard calculation method that can help you while tuning dipole antennas, by adjusting wire lengths. This method can be used also when you need to add lenght to your wires, and can be additionally used to quarter waves vertical antennas

Icom 706MkIIG Filters, Make a narrow CW filter work in SSB for the digital modes

The premier flea market for radio, electronics, Computer & communications equipment in Indianapolis

The OCFD Off-Center-Fed Dipole Antenna is an excellent multiband antenna that is relatively simple to construct, yet gets quite decent performance.

Hot Springs Village AR

Removing noise caused by ignition and injection systems

MikroTik is a Latvian company which founded in 1995 to develop routers and wireless ISP systems. Wifi Routers, router boards, switches, interfaces and enclosures.

The Pro 95 is a dual trunking handheld scanner designed by GRE and sold by Radio Shack

Carolinas Chapter of the Antique Wireless Association Inc. "CC-AWA"

Dedicated to the Indiana D-Star Amateur Radio Users

Resources for Kenwood TS-850SAT transceiver modifications, cables and tips

Software running on the Raspberry PI, Control up to 8 arduino rotators modules, Azimuth maps, Cluster support, Band decoder, contest Web Log, Webcam with RaspiCam support

A technical article that want to explain Coaxial Cable terms, specifications and applications. A glossary of technical terms with clear explanations.

The Fresno Amateur Radio Club was originally founded in the early days of Amateur Radio as the San Joaquin Valley Radio Club and affiliated with the ARRL on April 5, 1934.

Artwork Created in Verve by Michael A. Maynard K4ICY includes some nice amateur radio related paints

Electronic Component Distributor - ASAP Semiconductor is wholesale electronic component distributor in USA. We supply all types of electronic components like semiconductors, capacitors, resistors, diodes and many more

How to setup and configure the buddipole antenna in the J-Pole mode for the six meter band

Isle of Man Repeaters maintained by David Osborn GD4HOZ this site covers the VHF repeater GB3GD and UHF internet linked 70cm repeater GB3IM. Using Allstar software for linking GB3IM is the only site in the uk to have three transmitters. Supported by the Isle of Man Amateur Radio Society

Yahoo 360 hma radio blog

An interesting article dedicated to hams that want to start learning morse code, including notes on Methodology, online training tools, and a guide to Morse Keys

Troop I, Region 2 - Live Audio Feed Web Player

The PI6ATV repeater, operating on 10.475 MHz, serves the amateur television community by providing both analog and digital DVB-S2 services. Recent updates include user-adjustable Symbol Rate settings via Webcontrol, allowing operators to optimize their digital ATV transmissions for various conditions. This functionality, implemented on December 13, 2022, enables dynamic configuration of the digital stream. Significant technical milestones include the return of the analog ATV transmitter on 10.475 MHz, featuring a newly constructed liquid-cooled final amplifier by Edwin PD2EBH. This restoration on September 6, 2020, followed an 18-month hiatus, ensuring continued support for traditional analog ATV enthusiasts. The repeater's transition to DVB-S2 modulation, initiated on December 20, 2018, addressed capacity limitations of the previous DVB-S setup. This change from 20 MS/s with FEC 3/4 to DVB-S2 allowed for more efficient data handling, accommodating multiple channels within the available bandwidth and enhancing the overall digital ATV experience.

Radio programmin equipment, radio programming cables, all sort of cables and connectors, webcams, cameras, security products

QRP amateur radio & stuff by Adrian YO4HHP

Bucktown Visas and Passports, Inc. processes all of your international documents in as little as 24-48 hours from Chicago, Illinois.

Cable dealer of custom and standard cables, tools and testers,

The HARAOA Group have orginized to go to Broughton Island(OC-212) from the 5th until the 7th February 2010.

This Guide helps you to build the 1:2 BalUn 600 Watts DIY kit step by step. If a delta-loop or quad-loop antenna is powered with a coax cable from the transceiver it is necessary to use a 1:2 BalUn. This 1:2 BalUn uses a symmetrical 1:2 impedance transformer.

The Tektronix digital multimeter is a feature-rich tool with the accuracy and precision you need for your most demanding measurements.

For a discriminator output in an Icom IC-R7100, some mechanical work is required.

Sending the Audio from the Receiver to the Recorder, from the Recorder to the EQ, and sending the Audio from the EQ or Recorder to the Transmitter

Setting Up the SDR-1000 for WSJT using VAC 4.03

Presents the Westcoast Amateur Radio Association (WARA), VE7VIC, a prominent amateur radio club situated in Victoria, British Columbia. The site details the club's organizational structure, including its executive committee and meeting schedules, offering insights into local amateur radio governance and community engagement. It outlines various club activities, such as field operations, technical projects, and social gatherings, demonstrating the diverse interests of its members within the amateur radio hobby. The resource also highlights WARA's involvement in emergency communications, specifically mentioning its role in local ARES (Amateur Radio Emergency Service) initiatives and public service events. Information regarding repeater systems maintained by the club, including operational frequencies and modes, is provided, which is crucial for local hams seeking reliable communication infrastructure. The site also features a section dedicated to membership, detailing benefits and application procedures for prospective members. Furthermore, the website serves as a repository for club news, event calendars, and educational resources, supporting ongoing learning and participation among its members and the broader amateur radio community in the Pacific Northwest region. It also includes contact information for various club officers and general inquiries.

Founded in 1947 in Rochester, NY, the Rochester DX Association is an amateur radio organization dedicated to the art and science of DX operating and contesting.

Primary, Ion, and Polymer, a lithium battery primer, learn the differences between and varied uses for these diverse types of lithium batteries.

Constructing an End-Fed Half-Wave (EFHW) antenna offers a practical solution for HF operators seeking a multiband wire antenna without the need for extensive radial systems. This design typically employs a high-impedance transformer at the feed point, matching the antenna's inherent high impedance to a 50-ohm coaxial feedline. The article specifically details a 2012 approach, focusing on a transformer with a 49:1 turns ratio, which is a common configuration for EFHW antennas. The resource outlines the construction of a wire element cut for a half-wavelength on the lowest desired band, with specific coil arrangements enabling operation on harmonically related bands such as 40m, 20m, and 10m. It discusses the physical dimensions and winding details for the matching transformer, often utilizing a ferrite toroid core to achieve the necessary impedance transformation. The content provides insights into the operational principles and practical considerations for deploying such an antenna, including methods for tuning and optimizing performance across multiple amateur radio bands. While acknowledging that the presented information from 2012 may be superseded by newer insights, it serves as a foundational reference for understanding EFHW antenna theory and construction.

A nice blog about DXing, Shortwave Radio Listening (SWL) and Amateur (Ham) Radio by VK3BVW

Broadcasting from the ship the Jenni Baynton moored in Harlingen Harbour in the Netherlands, Radio Seagull can be heard on 1602 KHz AM