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An article on origin and usage of the Decibel, that has always been a logarithmically based representation of a power ratio

An article by CT1BOH about recording amateur radio contests. Recording contests is a great tool to detect problems and improve operating efficiency

Rick gryder's ham radio page is the page showing equipment and links to sites in amateur radio, as well as my interest in lighthouses and the sea.

Basically, this antenna is a 23-foot wire fed through a 4:1 un-un transformer. This antenna can be easily used in portable operation, for operating all bands from 40-10 meters.

Dxpedition to gabo island, australia, sept 2001 OC-196, ARLHS# aus-078, WLH No: 1031

CB station AP from Lieksa Finland

Project by N9SSA

Operating in a Single Operator Two Radios (SO2R) setup, especially with beverage antennas, often exposes the receiving radio's front-end to significant RF energy from the transmitting radio. This resource details a practical, homebrew receiver protection circuit designed to mitigate this risk. The core of the design involves a non-inductive 2W 22 Ohm carbon composition resistor in series with the RX antenna line, followed by two stacks of four fast-switching diodes (e.g., _1N914_) configured in opposite polarizations. This arrangement effectively clamps the incoming voltage to approximately 2.8 V peak-to-peak, safeguarding sensitive receiver input components. The series resistor plays a crucial role by absorbing excess power, preventing the diodes from exceeding their current ratings and potentially failing open, which would leave the receiver unprotected. The author, _N4KG_, measured up to 50 watts of coupled power between 80M slopers on the same tower, highlighting the necessity of such protection. The design is presented as a cost-effective solution to prevent damage to receiver input transformers, with the author noting successful protection of a receiver even after a resistor showed signs of overheating. This simple circuit can be integrated via a transverter plug, offering a robust defense against high RF input.

Scandinavian Young Ladies Radio Amateurs - YL club

Outlines the Club de Radio Amateur de Charlevoix (VE2CCR), a regional amateur radio organization serving the Charlevoix area in Quebec, Canada. The resource details the club's objectives, which include promoting amateur radio, fostering technical knowledge among members, and supporting emergency communications. It lists various club activities such as regular meetings, field day participation, and local repeater maintenance. The site provides contact information for prospective members and details on how to join the club, including membership fees and application procedures. Information on the club's repeaters, including frequencies and access tones, is also presented, facilitating local amateur radio operations. The resource serves as a central hub for VE2CCR members and interested individuals seeking to engage with the amateur radio community in Charlevoix.

TX on 28.265 from Pimento, IN

The Chelsea Amateur Radio Club is based on service to the community and the advancement of Amateur Radio in Southeast Michigan.

Demonstrates the practical application of APRS (Automatic Packet Reporting System) through the lens of HB9PVI's activities in Switzerland. It covers the system's core function of reporting geographical positions and telemetry data from various objects, including mobile stations, aircraft, and the ISS, distributed via packet radio and internet gateways. The resource highlights the routing paradigm shift introduced in April 2005, specifically the recommendation to use _WIDE1-1_ instead of RELAY and WIDE for digipeating to reduce duplicate packets. The page presents real-time maps displaying the positions of amateur radio stations in Switzerland and around Bern, updated every few minutes. It details specific callsigns like _HB9BA-2_ (HB9PVI's home QTH), _HB9BA-8_ (a weather station), and _HB9BA-4_ (a WIDE digipeater on Weissenstein mountain), providing context for their roles within the local APRS network. Links to track HB9PVI's mobile operations (_HB9PVI-9_) and handheld devices (_HB9PVI-15_, _HB9PVI-7_) are also provided. Furthermore, the resource curates a list of APRS software options for various operating systems, including _JavAPRS_ for Europe, _UI-view_, and _X-Astir_ for Linux, alongside digipeater/IGATE software like _DiXPRS_. It also offers downloadable APRS information, including a PDF article by HB9PVI and HE9ZGN, and a PowerPoint presentation in German, making it a repository of practical and historical APRS data.

Homepage of the belgian hamstation ON1DRS

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.

Serving Hardin County Since 1969

Ham Operator since 1960

The ICOM IC 7600 transceiver as successor of the IC 756 Pro3, resource page with many links and resources to the Icom top line HF transceiver

SV1GRB's Homepage, photos from dx-peditions and useful links

YU7EF EF0206 2m Band 6 Element Yagi Antenna project, provides 11.8 dbi gain

28 Dec 05 - 4 Jan 06 Grand Cayman IOTA: NA 016 GL: EK99, Jamaica IOTA: NA097 GL: FK17

28,227.5 MHz, from JN55VF first "IW" prefix beacon "ON THE AIR" activated from Italy

BARA is an ARRL affiliated club in Barry County, Michigan, which is located in the southwestern part of the Lower Peninsula.

Ham radio page from Brazil with many info on amateur radio in portuguese.

The North Shore Amateur Radio Club, Branch 29 of the New Zealand Association of Radio Transmitters (NZART) is an incorporated society for Radio Amateurs and interested persons.

Amateur radido station KB1HNZ operator Tim Watson, Gorham, Maine.

Hawaii Emergency Amateur Radio Club

Exaustive review of the self-contained, top-performance HF/6m transceiver Icom IC-7700

A web page devoted to the handicapped hams of the world.

How to add the YF-122CN 300 Hz CW filter or YAESU XF-119SN 2,3 Khz SSB filter in the Yaesu FT-857

Stacking yagi antennas for 50 Mhz band article by by Zaba, OH1ZAA/NN0Y

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.

Entities First Worked from Hong Kong on 50MHz

New Zealand Association of Radio Transmitters Auckland Branch 02

28.222mhz transmitting with 2 watts of power

Modifications for Retevis RT3 / Tytera MD-380 includes Hardware Modifications, Codeplugs, Software / Firmware Modifications.

General station info and Paddle Museum (online display of keys and paddles)

NARL homepage, the namibian amateur radio league

Station notes, personal informations and some links

Polish radio station

These were some of the steps I took to setup my Allstar link node/server and some of the modifications that I did to it.

W3FPR fixed level AF output fot the Elecraft K2

Wakulla Springs, Florida U.S.A.

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.

Product information, resources, enhancements and links of the popular ICOM IC-756PRO III

Associacao de Radioamadores de Amadora-Sintra Portugal