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MARCA, Inc. operates approximately 24 repeaters across Arizona mountaintops and Phoenix-area rooftops, supporting modes like D-STAR and Fusion. The club, holding the **W7MOT** callsign, engages in diverse activities including ARRL Field Day events near Forest Lakes, AZ, ARRL FMT contests, and antenna experimentation. Members actively participate in HF operations such as voice, digital, CW, DXing, and various digital HF modes, alongside MESH and EOC operations within the valley. The club's interests span a broad technical spectrum, from SDR radio building to antique radio restoration, and include modern digital modes like WSPR, WSJT, FT8, and FT4. They also explore computer-based operations such as Echolink, fostering a dedicated Single Board Computer (SBC) and Raspberry Pi group. Monthly VE testing sessions for Technician, General, and Extra Class licenses are conducted by Ray Vasquez, K4RMV. Meetings are held on the third Tuesday of each month, typically lasting two hours, with a business segment followed by a technical presentation. These gatherings occur in-person at IHop in Mesa, AZ, and concurrently via Zoom, accommodating both local members and winter visitors. Informal chat groups often form post-meeting to discuss specialized topics like D-STAR, SDR, APRS, MESH, and Fusion.

The Primary N6OCS Repeater is located at 5700 feet on Santiago Peak in the Santa Ana mountains.

Ultimax antennas manufacturer of amateur radio End-Fed and bazooka antennas made in USA

GM4YEQ Galashiels and District Amateur Radio Society (GDARS)

Kuwait Amateur Radio Society

Stand Alone Software Defined Radio, direct sampling receiver from 30 kHz to 1700.00MHz continuous frequency range, LAN interface for remote access

DF0WD/DL4YHF's Longwave Overview details amateur radio operations on the 135.7 to 137.8 kHz segment in Germany. The author outlines the "inofficial" European band plan, specifying segments for QRSS, TX tests, beacons, conventional CW, and data modes. Early LF activities at DF0WD began with a 20-watt CW transmitter, later upgraded to a homemade linear transverter capable of 100 watts, driven by an Icom IC706 on 10.137 MHz. The station's antenna system includes a 200-meter wire, approximately 10 meters above ground, supported by football field light-masts. Despite its length, the antenna's efficiency is noted as very low due to the immense wavelength of about 2.2 km. The author's experience highlights the significant challenge of achieving effective radiated power (EIRP) on LF, estimating DF0WD's EIRP at around 80 milliwatts based on field strength measurements from PA0SE. DF0WD/DL4YHF has successfully worked numerous countries on 136 kHz CW, including DL, F, G, GI, GM, GU, GW, HB9, HB0, LX, OE, OH, OK, OM, ON, OZ, PA, and SM. The author also mentions ongoing efforts to log contacts with CT, EI, LA/LG, and to complete a two-way QSO with Italy, demonstrating persistent activity on this challenging band.

Ham radio blog dedicated to WX Sat reception in particular NOAA satellites, antenna homebrewing and beacon reception by F4CWH

Radioamadorismo ,amador, ciência, comunicação, rádio, hooby, experiências from Brazil by PY3AB

Personal blog devoted to ham radio topics, portable operation, homebrew, antenna and other projects

The RACES ARES Disaster Assistance Repeaters (RADAR) group was formed by a team of amateur radio operators dedicated to providing high quality repeater communications for amateurs involved in public service communications or response to emergency/disaster situations.

Amateur Radio Amateur Radio Manuals & Books Computer Books & Programs Computer Hardware Rare & Hard to Find Books amateur radio,electronics ,electronis parts,tubes, amplifiers,towners, beam antennas and more

Using portable battery power is always a challange when operatin amateur radio in sota oprations. This article is about implementing lithium iron phosphate cells (LiFePO4) in ham radio portable operations.

A mission of the club is to promote amateur radio by way of educational programming and activities. MCARC is an affiliated club with the ARRL.

Antennas for Amateur Radio and short wave listening

Affiliated with the American Radio Relay League in the Oregon Section of the Northwestern Division

SMCC Amateur Radio Club - K9ONA

W1REI / DU1LWQ amateur radio station blog from California

Amarteur Radio Society Of India, the national society, is issuing Worked Republic of India (WRI) Award to VU and Dx operators.

Reference site of the HAMVOIP AllstarLink AllstarLink provides hams with a means of connecting radios, repeaters or simplex links, over the internet. It is built upon the asterisk open source PBX and runs on Linux

KB0OXD amateur radio blog

Documents S21RC's construction of an impedance transformer harness for a VHF/UHF cross yagi, utilizing 20m of _RG179_ cable. Details the creation of a DIY RF sampler with a -50dB sampling output, primarily for measuring HF radio PA section output with a Spectrum Analyzer, also applicable for _Pure Signal_ transmission. Chronicles the deployment of a 200m long beverage antenna for the _S21DX IOTA_ operation in 2022, positioned 2m above ground. Discusses the construction of a 3-element short beam for 10m to replace a previous 2-element antenna, with assistance from S21DW. Provides guidance on operating cheap _PA-70_ and _PA-100_ type Chinese SSPAs using IRF530 MOSFETs, emphasizing the necessity of a final LPF. Outlines the design and construction of a fully isolated interface for radio-to-computer connections, supporting various digital modes with isolated ground, audio transformers for IN/OUT, optical isolation for CAT/CIV, and isolated PTT/COS lines. Includes a log of software updates, such as the _HMI/TFT for NX8048K070_ and _2.1.14 Lite_ release with bug fixes for PEP hold and gradual watt decay.

Most members of GRRAA reside in Union County and Wallowa County Oregon, however we welcome any and all that have an interest in amateur radio.

Selling all brands of Hamradios and CB Radios based in Norway

Eham users review of Radio Shack PRO-95

Scandinavian Amateur Radio Teleprinter Group

The purpose of this blog is to help new hams and promote amateur radio

Highlights the VE2CWQ amateur radio club, a key player in Quebec's emergency communication network and a member of the _RAQI_ federation. The club actively supports the _CANWARN_ program, providing crucial communication links during outages or natural disasters when traditional telecommunication infrastructure fails. Members are encouraged to monitor specific frequencies for vital updates and instructions during emergencies. The club maintains a repeater, VE2RAW, operating on **449.325 MHz** from Mont-Rougemont, ensuring reliable local coverage for its operations. VE2CWQ emphasizes the significant public service role of amateur radio beyond hobby, contributing to community safety and resilience.

Over 500 different types of high-performance electronic cables are manufactured by Alpha Wire, catering to demanding industrial and commercial applications. Their product lines include the robust _XTRA GUARD_ series, designed for harsh environments, and a range of flexible coaxial cables optimized for signal integrity. These cables are critical components in amateur radio shacks, industrial control systems, and data communication networks, ensuring reliable power and signal transmission. The company provides extensive technical resources, including detailed product specifications, application notes, and RoHS certificates, accessible through their online resource center. Hams often utilize their wire and cable products for antenna construction, station wiring, and various DIY projects requiring durable and reliable conductors. Alpha Wire also offers tools like size guides and competitor cross-references, simplifying product selection. They emphasize continuous uptime solutions, reflecting their focus on quality and durability.

Operating ham radio in international waters

Coastal Amateur Radio is for hams south of the Fraser. Even if you live north of the Fraser you are welcome to join in. Hams who come together for the love of HF & VHF in the hobby.

The DIY 137 MHz WX SAT V-dipole antenna project details the construction of a specialized antenna for receiving weather satellite transmissions. It provides specific dimensions for the dipole elements, designed for optimal reception around the 137 MHz band, which is commonly used by NOAA and Meteor weather satellites. The resource outlines the materials required, such as aluminum tubing for elements and PVC for the support structure, along with the necessary coaxial cable and connectors. The article presents a clear, step-by-step assembly process, including how to form the V-shape and connect the feedline. It emphasizes practical considerations for mounting and weatherproofing the antenna for outdoor deployment. The design focuses on simplicity and effectiveness for amateur radio operators interested in satellite imagery. Key aspects include the precise angle of the V-dipole and the lengths of the radiating elements, which are critical for achieving the desired circular polarization response for satellite signals. The resource includes photographic documentation of the construction phases and the final mounted antenna.

927.1250 MHz Santiago Peak, CA USA

The TRI-STATE emergency communications response team is dedicated to providing help to public service agencies with communications when normal communications are not working.

The Japan Amateur Radio web journal, CQ Web is a portal to radio related japanese resources established in 1995

Encrypted messages, fancy technology, spies use them all to communicate, but sometimes the best way to hide is in plain sight. Right now, broadcasting across the airwaves around the world, are automated, anonymous shortwave AM radio stations that most governments won't acknowledge even exist, much less explain

A personal blog about amateur radio activities, including homebrew, bitx, ubitx, mcHF, JT65, FT8 and more digital communications.

Check out these vintage QSL cards from the 20th Century in this gallery of old QSL cards.

The Northern California DX Foundation is a private foundation established in 1972 to assist worthwhile amateur radio and scientific projects with funding and equipment.

The South Essex Amateur Radio Society was formed in 1983 in UK

UK frequency list provide reference table to lister to Police scanner channels UHF VHF, Amateur Repeaters, Ambulance CB Radio CoastGuard Rescue, marine VHF, Military and more.

Amplitude Modulation (AM) is essentially a mixing process where the audio modulating signal is mixed with the radio frequency carrier

Details the history and cessation of the Amateur Radio Association of Bahrain (ARAB), operating under the callsign **A92C**. Established in 1970, ARAB functioned as the primary representative body for amateur radio enthusiasts within Bahrain for several decades. The organization facilitated various amateur radio activities and provided a central point of contact for local hams. The resource indicates that ARAB ceased operations due to unspecified circumstances. It explicitly states that the organization is no longer active, marking the end of its long-standing service to the Bahraini amateur radio community. Information regarding a newly formed society, open for membership, is provided, with contact details for Fawaz, **A92AA**, for further inquiries about the successor organization.

FEDI-EA is the first federation of radio amateurs associations in Spain, born to promote activities and services for its members and affiliates

Taken from: Brief History of Amateur Radio in Calcutta-by Avinash Missra, VU2EM

Kendall Amateur Radio Society (KARS) offers ham radio activities and fellowship to ham radio operators in Boerne, Tx, the hill country and NW San Antonio.

Our club has been setting the pace for Amateur Radio in Cleveland County and Shelby for over 50 years.

Alcatel Amateur Radio Association