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21 28 and 50MHz three bands whip antenna by JA1HWO

Projects you can build, an amplified shaped sine-wave oscillator

1500 watts of RF output on the 70cm band requires robust amplifier design, a challenge addressed by this project featuring the GS-23b / 4CX1600U Svetlana tube. The resource details the construction of a high-power UHF amplifier, providing insights into component selection and layout necessary for stable operation at these frequencies and power levels.

Online Log and dx info for Southern Line Islands DXpedition 2010

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.

A well documented PDF document containing picture sequence taked during the repair of an Icom IC-7700 HF transceiver power amplifier module

Use these forms to manually enter log data to produce a Cabrillo file and submit it to a contest sponsor. The forms are designed for contesters who used paper logging or logging software that doesn't produce a Cabrillo file.

Approximately 2.8% annual decline in Australian amateur radio licenses was observed over the five years leading up to 2002, a trend that prompted further analysis of the country's amateur population. This resource examines licensing statistics and demographic shifts within the Australian amateur radio community between 1998 and 2007, utilizing available data to identify patterns in license issuance and renewal. The study focuses on **population trends** and the underlying factors contributing to changes in the number of active **amateur radio operators**. It provides insights into the health and growth trajectory of the hobby in Australia during this specific period. Understanding these demographic shifts is crucial for clubs, regulatory bodies, and equipment manufacturers to adapt strategies and foster engagement.

T32 DX peditions logs, T32CI T32MI T32SI T32VI

Solar Power for Your Ham Station, It is Easier Than You Think QST article April 96 by KE0OG via Repeater-Builider.com

A sweep generator that produces a sawtooth waveform which sweeps the oscilloscope beam from left to right via its X input, and simultaneously the VCO frequency.

This document is a must read for anyone considering building a good low cost HF multi-band antenna system. The author combine in this document four important ingredients to produce simple but effective antenna system, like antennas of non resonant length, line attenuation, the transmatch and the balun

Project with pictures and descriptions for building a portable 12 Volt DC power source by N1KXR.

Complete guide to receive weather satelite images with a RTL SDR dongle and free software

PL-259, Motorola & N connectors, Coax Seal, universal adapter kit, TNC, Mini-UHF, SMA, F & BNC connectors, audio connectors,antenna mounts and antennas

Instructions on how programming a regency scanner model R1060

This video will provide a foundation for understanding how power amplifier circuits work. If you are new to High Frequency Power Amplifier Circuit Design, this is the place to start.

Design, build and supply Military Diesel Operated Tactical generator sets, diesel generator sets, custom generators, auxiliary power units, portable power generators and tactical quiet generators used by the U.S. Navy and Air Force.

How it's misused and misunderstood, and why it's not useful.

1.2 to 30 Volts 1.5 Amps Power Supply

North West CB Radio is a page with radio modifications’s, Local Portland’s Traffic info, Trucker things like CB slang, DX info and a forum. Also we host The Saturday Night Stomp Fest in the Portland area. Results are posted weekly.

The Northwest Amateur Radio Society serves amateur radio operators in the suburban FM 1960 area NW of Houston, Tx. NARS is active in community and public service events.

Satellite Amateur Radio Club, W6AB, located on beautiful Vandenberg Air Force Base, on the California Central Coast.

dedicated to ATV ham radio operations, mainly in italian

Key west amateur radio club w4llo

Comitato Regionale Veneto della Federazione Italiana CB - Servizio Emergenza Radio.

Funny photos of IQ7R contest team and dx-spedition

Understanding the operational impact of Broadband over Power Line (BPL) on amateur radio communications is crucial for any radio amateur, especially given the potential for significant radio frequency interference (RFI). This ARRL tutorial delves into the technical aspects of BPL, explaining how the technology operates by transmitting data over existing electrical power lines, which can inadvertently radiate broadband noise across various amateur bands. My own field experience, particularly on the lower HF bands, has often involved tracking down noise sources that exhibit characteristics consistent with BPL emissions, making this a pertinent topic for maintaining clear receive conditions. The resource further details the specific FCC rules and regulations implemented to restrict BPL deployment. These regulations aim to protect licensed radio services, including amateur radio, from harmful interference. It outlines the technical standards and operational limitations imposed on BPL systems to minimize their impact on the electromagnetic spectrum, a critical aspect for contesters and DXers alike. For those engaged in RFI mitigation, the tutorial provides a foundational understanding of the regulatory framework that can be leveraged when addressing BPL-related interference issues. It serves as a valuable reference for hams seeking to comprehend the technical challenges and regulatory solutions surrounding this pervasive noise source.

An APRS-compatible Ham Radio Weather Station

Performance of an unloaded ground mounted vertical as a multi-band HF antenna.

Broadband over power lines (BPL) is a technique for transmission of high speed data (broadband Internet) over powerlines. Access BPL technology injects radio frequency energy into powerlines which were not designed for transmission of radio frequency energy, and leak substantial energy that causes interference to radiocommunications service

Variable Power Supply for the bench

W8NWS is the Cincinnati, Ohio chapter of Skywarn.

Supplier and exporter of generator, diesel generator, petrol generator, industrial generator, silent generator, power generator, electricity generator, gas generator, air cooled generator, gensets 1kva, 2kva, 5kva, 10kva, 50kva, 100kva, 250kva

A very exaustive and complete article on JT65A and JT65-HF operating mode, including software download links, installation notes, how to make JT65A QSO and videos to correctly work with weak signals by NW7US

West St. Louis County Police and Fire Live Audio Feed

October 2003 QST article on working digital mondes with sound card interfaces

A Resonant FeeD line (RFD) antenna for 7 MHz prohect tested and tuned.

W1MX, the MIT Radio Society, stands as America's oldest college amateur station, providing a vibrant hub for MIT students, faculty, and staff interested in RF engineering, telecommunications, and radio science. The club, formerly known as 1XM, fosters a growing membership and hosts regular business meetings on the first Tuesday of each month at 7:30 PM ET, alongside weekly social gatherings every Friday at 7:00 PM ET in room 50-358. No prior radio experience is necessary to participate, and interested students are encouraged to attend a social meeting for a station tour and to learn about typical club activities. The society emphasizes experiential learning opportunities, actively seeking support to build a new and improved station at MIT. The club maintains a consistent presence in 50-358 during semesters and IAP, often extending into the summer, with the exception of club trips. Members can also access a dedicated webpage displaying the last 30 days of door activity, updating every five minutes, while a public frame shows the current door status and recent activity.

Introduction to WSPR beacons. Article describe WSPR2 and WSPR15 beaconing mode and include a frequency reference table for both WSPR modes

Getting started on RTTY contesting. A PDF by ED Muns, presented at CTU conterst university, about amateur radio RTTY Contesting

An High voltage power supply design by F1FRV

The South Alabama Radio Club is located in Covington County, Alabama in grid square EM61

Personal web pages with logs, information on learning cw and operating in CT-land.

KB9AMG's Top WSPR Spots presents a focused online tool for monitoring **2-way WSPR reports**, specifically detailing propagation data from February 2026 through March 2026. This resource aggregates _WSPRnet_ data, allowing radio amateurs to observe weak signal propagation conditions across various bands. The interface is straightforward, presenting callsigns, frequencies, signal-to-noise ratios, and distances for each reported contact, which is crucial for understanding current band openings and signal paths. The utility of this WSPR spotter lies in its ability to quickly visualize global propagation. Users can identify active stations and assess signal viability over long distances, with reports often showing contacts spanning thousands of kilometers. For instance, a typical WSPR report might indicate a signal from Europe reaching North America with a _SNR_ of -25 dB, demonstrating effective low-power communication. This data is invaluable for planning DX operations or evaluating antenna performance under actual propagation conditions.

The Indianapolis Police Scanner on Broadcastify allows users to listen to live police radio transmissions from Indianapolis. The website provides access to emergency communications and public safety broadcasts.

A project of a linear regulated for low noise power supply 16v, 10A

Presentation about finding, restoring, updating and operating vintage Ham Radio by K4QKY and Bill Call, KJ4W