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TOEC was founded in 1991 by a bunch of contesters in Northern Sweden. The purpose of TOEC is to support contest related activities in as many ways as possible. -
The purpose of this webpage is to document an attempt at this project starting with the 80m core receiver first and also having the parts on hand for then adding the first dual conversion band (40m) -
Aerial 51 is an antenna manufacturer producing HF Wire antennas. Their antenna product catalog includes portable, OCF wire antennas for HF bands but also QRP transceivers, and accessories for portable operations.Based in Germany -
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CT1FUI - Amateur Radio from Portugal , QSL card collection from 90's -
ECARS began operation in 1968 as an Amateur Radio public service net for mobile operators on 7.255 MHz -
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Italian station operating mostly in QRP Mode, contain some interesting QRP projects for portable antennas and antenna mounts. -
Old Cars and Amateur Radio. This club has a repeater on site of the World Longest Running car cruise. Part of the ARRG.US network -
Always wanted to know what kind of sounds we hear, when listening to the radio? Here are some examples -
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A simple DIY signal generator based on NorCal QRP club kit -
Dubus article about DL6WU long yagi antennas for 23 cm band Article is both in german and english. Yagi antennas are valid alternative to dishes for troposcatter operations. This article explains design and mechanical data for 1296 MHz Yagi Antennas -
Amateur Radio, SkyWarn, RACES, ARES, and more -
The richardson wireless klub is an arrl special service club of amateur radio operators based in richardson, tx, usa. -
Common problems of the 572B tubes often used in many RF Power Amplifiers -
The current EiBi shortwave radio schedules, contains an update aggregated list of radio broadcasting stations schedules. File is provided in text format and is availale to download for free. -
Web Page of the Fort Smith Amateur Radio Club -
FreeDV plus Video adds simultaneous digital voice (FreeDV) to ZL2AFP's OFDM TV (see OFDM TV page listed under Software/SSTV and FreeDV page listed under Software/Digital Voice). An older version of OFDM TV is used, modified for compatibility with FreeDV. The video is 1 frame/sec, 36-lines, with full color. Total bandwidth is 3.5 kHz. -
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Read more about the purpose, policies, and procedures of The National Traffic System in this 48 pages PDF File -
The cable testing approaches discussed in this article gives an idea about the electrical characteristics of a coaxial cable. Velocity of Propagation, Characteristics Impedance, Return Loss Measurement and more -
A multiband Fan Dipole that works on 40 20 15 meters band, making a folded dipole for 7 MHz band and additional element for the 21 MHz and 14 MHz -
The _Alessandro Volta RTTY Contest_ is an annual digital mode competition focusing on Radioteletype (RTTY) operation, challenging participants to make contacts across various HF bands. This event typically occurs in January, drawing a global field of operators aiming to maximize their QSO count and multiplier accumulation. The contest emphasizes accurate exchange of signal reports and serial numbers, with specific rules governing single operator, multi-operator, and SWL categories. Participants utilize software like _N1MM Logger+_ or _WriteLog_ to manage their logs and generate Cabrillo files for submission. Scoring is based on points per QSO, multiplied by unique DXCC entities and Italian provinces worked on each band. The contest encourages both seasoned RTTY contesters and those new to digital modes to engage in competitive HF activity, promoting skill development in digital communication. Final results and logs are typically published on the contest website, showcasing top performers and providing detailed breakdowns of scores. -
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Homebrewing a Lightweight linked dipole HF antenna for portable SOTA operations -
Introduction to Software Defined Radio by AC8GY -
In his page the author includes 27 mp3 audio files that compose the whole CW training course, instructions and whole lessons transcript are available in Italian and English. -
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Kenwood TS-690S Preventive Maintenance -
Sound card based multimeter -
The Nashoba Valley Amateur Radio Club (NVARC) was formed in Groton, Massachusetts, in the spring of 1992 and has grown from the original 13 founders to over 60 members. -
4 Stacked 4 element yagi for six meters band -
The W1HP Philips Amateur Radio Club, originally the Hewlett-Packard ARC, has a history rooted in Andover, Massachusetts, as an employer-sponsored club. It evolved from a "full-service" club to primarily a Field Day club, maintaining its focus on this major annual effort. The club has participated in Field Day under various configurations, including W1HP/1B in Arizona, and has partnered with K1KKM and utilized GOTA stations like K1KKM and KD1NA. Recent Field Day operations reflect adaptations to changing circumstances, with members operating individually due to COVID-19 and later under "new" ARRL rules, sometimes as a "distributed" club. The club's constitution is also referenced, providing insight into its foundational structure. This page is maintained by W1DYJ, with a last update noted as 9 December 2025. -
The S.F.A.R.C. is one of the oldest organizations of it's kind in the country This ARRL affiliated club was founded in 1916 and incorporated in 1919. -
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This antenna is a vertical loop antenna mounted on a 8 meters high grounded mast with an input impedance of 50 Ohms without a matching device -
Online Constant - k Lowpass Filter calculator -
An overview of digital HF radio operating modes includes a sample audio recording of each digital mode by WB8NUT -
K6BJ UHF MSF5000 Repeater Construction Log -
Live Audio Feed of the KI4FVI repeater in henry county Georgia -
MARS modification instructions for the Yaesu FT-450D -
Repairing and restoring a Tektronix 465 oscilloscope
