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A simple free running oscillator oscillating at the receiver\'s IF (intermediate frequency) beats with the incoming signals in either CW or SSB and the resultant audio frequency goes to the AF amplifier.

Amateur radio, photos, and links

The members of the Shoreline Amateur Radio Club reside in New Haven, Middlesex, and New London Counties.

W9dc north america amateur radio checkpoint for iota islands on the air and wlh world lighthouse award applications and award instructions

A Bluetooth Headset Interface with built-in PTT for Amateur Radio by Bertrand Zauhar, VE2ZAZ

A simple charger designed for charging 12 V sealed lead acid batteries, used by radio amateurs for portable operation Amp-Hr Class used by radio amateurs for portable/emergency operation.

Conejo Valley Amateur Radio club AA6CV CVARC is an ARRL special service club.

Ham radio wire antennas are the most common form of antenna used by ham radio operators. Here you can find hints and tips on diy wire antennas

The Pikes Peak FM Association is a nonprofit, amateur radio VHF/UHF group which operates and maintains VHF and UHF communications facilities serving the Colorado Springs and Pikes Peak region.

York Region Amateur Radio Club, one of Canada's largest

Basic guidelines for proper placement of an amateur radio mobile antenna

iOS EchoLink client, this free app will allow licenced ham radio operators to use iPhone, iPad or iPod devices to connect to the echoLink system and connect to repeaters or other echolink users.

Welcome to the home page for the Lake Area Amateur Radio Klub (K5LRK) located in southern Denton county, Texas

Radio for Peace International (RFPI) is a Global Community Radio Station located in Costa Rica, Central America that broadcasts progressive news on shortwave radio and the internet on topics of Peace, Human Rights and the Environment. RFPI gives a voice to the voiceless by promoting democratic communication.

Zveza Radioamaterjev Slovenije

The mark 2 Crossfield Antenna was described in Sprat 76 by Alec, GD3HQR

Presents the **BayCom** packet radio system, detailing both its hardware and software components specifically designed for amateur radio use. The resource offers insights into the technical specifications and operational aspects of the BayCom modem, which has been a staple for many German packet radio enthusiasts. It covers the integration of these components within a typical amateur radio station setup, enabling reliable digital communication. Further, the site provides a broader context by including general information about the German packet radio network. This encompasses network topology, operational protocols, and historical developments relevant to packet radio in the region. Users can find details on how to connect to and utilize the existing infrastructure, fostering participation in the local digital amateur radio community.

CAARA, an ARRL affiliated club, operates the 2 meter W1GLO repeater on 145.130 MHz

Ikeda Shimin (Citizen) Amateur radio Club is the club which consists of Ikeda(JAPAN) citizens.``Sorry...japanese language only.

Assocation des Radio Amateurs Libanais

The QRV.DK platform offers a dedicated **QRZ callsign search engine** specifically tailored for Danish amateur radio operators. It enables users to look up callsigns and ascertain their **Logbook of The World (LoTW)** status, a critical feature for DXers and contesters seeking QSL confirmations. The search functionality facilitates rapid access to operator details within the Danish amateur radio community, streamlining contact verification processes. Beyond callsign lookups, the resource includes a comprehensive repeater list for Denmark, providing essential information for local and regional VHF/UHF operations. This feature supports mobile and portable stations in locating active repeaters, enhancing communication reliability across various bands. The site also curates a collection of ham radio links, serving as a centralized hub for related amateur radio resources.

A University of Florida Student Organization. The W4DFU amateur radio station was established in 1934 and represents the Gator Nation internationally on a daily basis.

Ham radio Blog, focusing on homebrewing and testing antennas, rig mods and contesting.

Provide an educational and recreational organization whose purpose is to support the Home Port Alliance in providing technical expertise, skills and volunteer manning.

Japan Amateur Radio League

Ham radio portal of canada

ARRL Affiliated Club Phoenix, Arizona

Wrexham is in North Wale's and our club is open to all radio fans

A collection of modifications and improvements to the Ameritron ALS-600 ham radio RF power amplifier

Wikipedia page about amateur radio spectrum assigned to the amateur radio service

The Warminster Amateur Radio Club Inc. (Warminster Township, Bucks County, Pennsylvania) is a general purpose amateur radio club and its over 135 members are involved in all aspects of amateur radio.

Superstition Amateur Radio Club: Ham Radio events and activities of the Superstition ARC include promotion of amateur radio amongst the public via licensing classes and radio communication demonstrations, on-air nets and discussion, and the December Hamfest in Mesa, Arizona

Operating as a local amateur radio club, the Wireless Association of South Hills (WASH) provides a community hub for hams in the Pittsburgh, PA area, identified by the N3SH callsign. The club engages in a range of activities including the Annual Field Day, the PA QSO Party, and a 2 Meter Contest, fostering participation in various aspects of the hobby. WASH also supports local ARES/RACES efforts, highlighting the critical role of amateur radio in emergency communications during disasters, and facilitates ARRL/VEC exam sessions for new licensees. Beyond contests and emergency preparedness, WASH hosts club picnics and an annual hamfest, promoting social interaction among members. The club maintains VHF/UHF repeaters, which are essential for local communication and extending range for members. Regular activities include a Monday evening WASH NET at 8:00 PM, providing a consistent on-air gathering point. The club's focus on both recreational and public service aspects of amateur radio, from making new friends to providing vital disaster communications, underscores its comprehensive approach to the hobby.

Local radio club for Harlow in Essex, England

Open source project offers a solution to remote control of your Amateur radio station. Base for connecting other components and their remote control. The main advantage is low cost and adaptability

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

Ham Radio store with on-line shop in Bari Italy

Here a comparison of Kenwood TS-590S used with MC-60A and the oringina dynamic microphone

Established around 1968, the Wichita Amateur Radio Society (W.A.R.S.) N5WF provides a central hub for amateur radio operators in the Wichita Falls, Texas area. The society actively supports local ham radio interests, fostering community engagement and technical development among its members. W.A.R.S. is known for its commitment to public service communications and promoting the amateur radio hobby through various activities and educational initiatives. The society's activities often include field operations, technical presentations, and participation in emergency communications drills, which align with its mission to support the amateur radio community. Members frequently engage in _DXing_ and _contesting_, sharing their experiences and knowledge to help others improve their operating skills. The club also maintains local repeaters, providing essential infrastructure for regional communications.

Home for dutch speaking radioamateurs, wordwide. We also provide information about our hobby in english and other languages. Hamradio guide for visitor to Holland

Online calculator, to convert dbWatts to Watts and vice-versa, or ERP and EIRP by G4URH

Microcontrollers for many ham radio applications including repeater controllers, beacon transmitters, keyers, antenna switches, battery monitors, etc.

OM3CPH Universal HAM radio/generator DDS Unit with AD9850 or AD9851

General Motors Amateur Radio Club - WW8GM EchoLink Repeater in SE Michigan

A review of the Buddipole Deluxe Antenna portable HF VHF ham radio antenna

The idea makes use of a very simple direct conversion receiver on the band of interest.

How to measure the characteristic impedance of a unknown transmission line using MiniVNA

TwinsLAN is Minnesota's only amateur radio club devoted to digital communications

Collection of several Crystal Radio receiver circuits with schematics diagrams and pictures