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Review of the popular Heil PR-781 mic, connected to an Icom IC-7800 by k3dav

The intent of this article is to help the semi-non-technical person understand what is inside the Drake TR-7(A) Transceiver, how it works, and discusses simple adjustment and modifications the end-user can perform

Receiver performance review of the Kenwood TS-890S HF,50MHz,70MHz amateur radio transceiver by Sherwood Engineering

DK8KW Longwave Information

Performance data of the KIO Hexagonal Beam antenna

Evaluation of various microphones on-air using an Icom IC-7700 by VA7JW

A summary or tutorial about the basics of the spectrum analyzer, what it is and what it is used for.

Yaesu FL-110 160-10m HF linear ampflifier as ideal power amp for the FT-817 by N2CHK

How to setup a proper antenna feed line with a particular attention to RFI by K0GKJ

UV-3R Review at G4ILO Blog with long textual review, pictures and some sound files

The Vacuum Tube FAQ by Henry Pasternack

An unusual Titan DX antenna seutp, done without the standard counterpoise. This document is not an official manual, but rather a personal note to record the antenna setup with the custom wire counterpoise.

Dealer of electronic test equipment dealers since 1977 equipment manufactured by Tektronix, Hewlett Packard, General Radio, Dranetz, Bird, Fluke, ENI, ESI, Wavetek, Narda, Keithley, Weinschel, Microlab/FXR, Systron Donner, Kepco, Lambda

remoteAudio is an multi platform Audio streaming application for Amateur Radio purposes. The most typical use case for this software is the remote operation of an amateur radio station. remoteAudio supports multiple users and multiple audio sources. At any time multiple clients can listen simultaneously on the same radio, although remoteAudio only allows one user to transmit.

News, frequency guides and programme information, on shortwave and other international media.

This article shows how to power an amateur radio station from solar power using four kits that have been designed to work together in a modular way, each kit provides a unique function.

Quilon Amateur Radio League Kollam Kerala INDIA

The resurrection of a R-4C by W7VO

Some techniques on homebrewing yagi antennas by VK5AJL

An article describing a homemade 40m wire OCF Dipole

My place in cyberspace for thinking out loud about the Three Rivers Area Montioring Association and its Sunday evening Pittsburgh Area Scanner Net as well as ham radio and the Linux operating system

A moxon antenna for the 50 MHz build with 19 feet of 14 AWG copper wire, and based on a set of PVC pipes. This is an easy to build project that will give you an efficient directional antenna on 6 meters band with low SWR on more than 1 MHz bandwidth.

Australian manufacturer of HF Communications Antenna Systems for Military, Comercial, Mining & Amateur Radio

Tables comparing attenuation of common coax cables on amateur radio bands

Luxury villa equipped with ham radio equipment to let.

The page provides a detailed guide on how to build your own NOAA weather satellite receiving station, covering hardware, antenna, computer setup, and software installation. It offers a straightforward explanation suitable for beginners and serves as an educational project. The content includes step-by-step instructions and tips for observing satellites in the night sky.

Simply work as many countries and CQ Zones as you can in each calendar year, regardless of the band or mode

Review site of the Icom IC-706 MkIIG by KV5R

Encouragement for Little Pistols, article originally written for and published in SKIP the monthly newsletter of the Fresno Amateur Radio Club

A sound file collection of QRP contacts by AE5X

SPX Communication Technologies, operating under the TCI International brand, presents a range of radio frequency (RF) solutions primarily for government, defense, and commercial sectors. The offerings include advanced systems for spectrum monitoring, communications intelligence (COMINT), and high-frequency (HF) and medium-frequency (MF) broadcasting and communication antenna systems. Specific product lines encompass _Blackbird_ COMINT systems, _Scout_ spectrum monitoring receivers, and various antenna arrays designed for robust performance in challenging RF environments. The resource details the capabilities of these systems, such as wideband signal detection, direction finding (DF), and signal analysis, crucial for intelligence gathering and regulatory compliance. It also highlights the engineering behind their antenna designs, which are optimized for specific frequency ranges and operational requirements, including high-power broadcast applications and secure military communications. The information presented emphasizes the integration of hardware and software for comprehensive RF situational awareness. The company's focus on empowering partners to "Command the Spectrum" underscores its commitment to delivering critical tools for signal interception, analysis, and management across diverse operational landscapes.

Plastic tubing and custom plastic tubing from a manufacturer that specializes in the custom manufacturing of close tolerance plastic tubing products.

Technical specifications and details of the Yaesu FL-2100B HF Power Amplifier

Balloon Experiments with Amateur Radio

Java based interface to dxWorld.com for Linux by K0EMT

Test equipment, counters and meters

Information on ham radio or amateur radio (radio amatur)

This page is a short description of the four phased verticals system for 160m 80m and 40m

Build a Power Source for Portable Ops that will last a while by n1gy

Mobile RFI, often manifesting as persistent noise in the receiver even with the antenna disconnected, frequently originates from the vehicle's power supply system. This guide details systematic troubleshooting steps, beginning with isolating the radio from the car's 12-volt supply to confirm the power system as the noise source. It emphasizes the critical importance of drawing power directly from the battery using **heavy gauge wire**, bypassing the fuse block to leverage the battery's natural capacitance for RFI suppression and ensuring a solid RF ground. Proper routing of power lines through the firewall is also covered, advocating for dedicated grommeted holes to prevent inductive coupling from other wiring harnesses. The article stresses the necessity of fusing both positive and negative leads from the battery, a crucial safety measure to prevent damage to the rig and mitigate high-current risks should the battery's engine block ground become compromised during service. Addressing **alternator whine**, a common high-pitched noise that varies with engine speed, the resource suggests checking battery connections and the alternator-to-battery harness for looseness or corrosion. It also mentions the utility of adding an external RF noise suppression capacitor in parallel with the alternator's internal capacitor for enhanced filtering, and the effectiveness of commercially available in-line power supply filters.

A web site for those interested in ham radio Software Defined Radio (SDR). SDR Zone provide forums, reviews and user blogs relating to any type of SDR

A Programming-Free Automatic Arduino Antenna Switch project published on NCJ

Using absurdly low-speed CW for "communications"

Find QSL managers using various QSL databases

Amplifiers, filters, attenuators, mixers, PLL, switches and frequency dividers, signal generators, power detectors, transimpedance amplifiers, variable gain amplifiers and more

Hawaii-Californian Tropo ducting reports

Raytown Amateur Radio Club - Kansas City/Rsytown, Missouri

The Broadcast Employees Amateur Radio Society, Inc. (BEARS) operates an extensive network of **VHF and UHF repeaters** across New York, the Hudson Valley, Long Island, and New Jersey, accessible to all licensed amateur radio operators. This resource details the club's structure as a 501c3 tax-exempt non-profit, emphasizing its role in providing ham radio training, testing, and critical communications support to various public and private emergency response agencies. Key repeaters include W2ABC/RPT on 147.27 MHz with a 141.3 PL tone, serving as a central point for club activities and broader network access. BEARS is also a founding member of the **Disney Amateur Radio Interconnect (DARI)**, a consortium of open, linked VHF and UHF repeaters spanning major metropolitan areas such as Philadelphia, Baltimore/Washington DC, Orlando, Bristol, Los Angeles, and Boston. This interconnected system facilitates wide-area communication for members and supports emergency preparedness efforts across multiple regions. The club's focus extends beyond Disney employees, welcoming aspiring and current hams from outside the company to participate in its activities and utilize its robust repeater infrastructure.

Heavy duty digital multimeters