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Contest results for all ARRL contests

Developing a protection plan against lightning

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

Learn how to operate abroad and get you licence valid and recognized in many countries

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

This program converts an ADIF report file from ARRL's Logbook of the World (LoTW) to comma-separated value (CSV) format so that it can be read into a spreadsheet program like Microsoft Excel.

ARRL Affiliated Club Phoenix, Arizona

Wondering whether to spend a fine day with the YL or with the antenna? This article may help you decide by W1GV

Q15X25 is a packet modem with a KISS/AX.25 interface designed for HF transmission of AX.25 packets and TCP/IP using Automatic Repeat reQuest (ARQ) and forward error correction (FEC).

Choosing the right feed line for your antennas, is a critical decision to your station setup.

The scranton pocono amateur radio club (spark) known as the Abington Amateur Radio Club one of the most senior ARRL affiliated clubs in Pennsylvania.

ARRL special service club

High Speed Multimedia Radio Introduction by ARRL Working Group Chairman. Report of the High Speed Multimedia (HSMM) Working Group ARRL Board of Directors 2006 Annual Meeting January 22, 2004

W/VE amateurs work as many amateur stations in as many DXCC countries of the world as possible on 160, 80, 40, 20, 15, and 10 meter bands. Foreign amateurs (also including KH6, KL7, CY9, and CYØ) work as many W/VE stations in as many of the 48 contiguous states and provinces as possible.

Tutorial about broadband over power line and the new FCC rules restricting how it can be deployed.

PACTOR can be viewed as a combination of two earlier digital modes, packet radio and AMateur Teleprinting Over Radio (AMTOR). PACTOR provides improved throughput because its transmission speed adapts to the quality of the link and it uses Huffman compressed characters.

Getting squeaks and squawks from your H-T? Are pagers crunching your mobile rig's front end? Here's how intermod happens--and how to fight back!

The results from ARRL contests are available here.

VHF UHF Microwave EME Standings, a Who's Who on top in USA

ARRL page dedicated to RF Safety

A look behind the scenes, learn how the ARRL laboratory evaluates new products, and what all those numbers mean to you by WA1SVF

PACTOR-II is a fully backward-compatible improvement to the original PACTOR system. It is an adaptive mode that applies different modulation and encoding methods depending on the channel quality.

By by Larry Wolfgang WR1B in QST Archives at ARRL

Information about RF driven lamps

The Lassen Amateur Radio Club has been affiliated with the ARRL since 1972

ARRL Resources about Lightning Protection for the amateur radio station

A reference table of frequencies where you may find AM operations activity

A sharewave windows logging program for the ARRL 10 meter contest by N3FJP

An ARRL article collection about influence of radio frequency with pacemakers and other similar medical devices.

VHF/UHF Contest Logger is a windows freeware contest log program that supports ARRL VHF/UHF contests and other popular VHF contests

Serving the needs of the Amateur Radio Operators in Charlotte, DeSoto, Hardee, Highlands, Hillsborough, Manatee, Pasco, Pinellas, Polk, and Sarasota Counties.

Solar Flux, Geomagnetic Activity indexes and interpreting their relation

The MT-63 modem, constructed around a high speed DSP processor, either in a dedicated external DSP unit like the Motorola EVM, or in PC software using the PC sound card, transmits 64 tones spaced 15.625 Hz apart, in the 1 kHz bandwidth.

JT44: New Digital Mode for Weak Signals

International ARRL DX Contest score records, phone recods

Presents a concise guide for Amateur Radio operators participating in Jamboree-on-the-Air (JOTA), an annual event connecting approximately 500,000 Scouts and Guides worldwide via ham radio. The resource details how to initiate a voice contact, including the use of "CQ Jamboree JOTA" and proper signal reporting with the RST system. It also outlines the typical exchange information, such as name, QTH, Scout rank, and age, encouraging participants to practice their responses. Authored by Bill Wetherill, N2WG, the brochure provides a practical phonetics chart and a comprehensive Morse code dictionary, including punctuation and prosigns like AR and SK. It clarifies rules for third-party operation under the direct supervision of a licensed operator, noting restrictions on international contacts without specific government agreements. Additionally, the guide lists recommended World Scout Frequencies for SSB and CW across 80, 40, 20, 17, 15, 12, and 10 meters, emphasizing courteous operating procedures. It includes a section on common Q-signals like QRM, QRN, and QSL, alongside the Amateur's Code, which stresses considerate, loyal, progressive, friendly, balanced, and patriotic conduct.

AO-51 Operating guidelines and introduction

The WAS (Worked All States) Award is available to all amateurs worldwide who submit proof with written confirmation of having contacted each of the 50 states of the United States of America.

ARRL contest rules, forms and log sheets in pdf and ascii format for ARRL contests

The Central Arizona DX Association is an ARRL-affiliated club.

Established in 1914, the Sacramento Amateur Radio Club (SARC) is an ARRL-affiliated Club.

Solar activity can aid or hamper HF propagation beyond line-of-sight range, WA1SVF and N6BV answers to questions about Sun influence on radio signals propagation

Indiana's Premier Repeater Group An ARRL affiliated organization

ARRL has embarked on a project to learn firsthand what D-Star digital technology has to offer and to assess its capabilities in a real-world Amateur Radio environment.

NARC is an ARRL affiliated amateur radio club located in Norwood, Massachusetts, USA. Approximately 20 miles south of Boston

The electchester vhf club is located in flushing, queens, ny and operates an arrl coordinated, 2 meter, vhf repeater designed for amateur (ham) radio use.

2009 IARU HF World Championship Contest Rules

G-TOR is a trademark of Kantronics, Inc. G-TOR (Golay-Teleprinting Over Radio) can be viewed, in part, as a variant of the Automatic Link Establishment (ALE) protocol, outlined in MIL-STD-188-141A.

Aamateur radio club affiliated with the Amateur Radio Relay League (ARRL) from Fitchburg Massachusetts. MARA owns and operates the W1GZ repeater 145.45- with a tone of 74.4.

Log of the World by ARRL let hams confirm two-way contacts they have made and use the confirmations as credit toward various awards.