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Basic information in spanish hon how to become ham radio operators, or radioaficionados

K8CU technical topics article about high voltage breakdown tester necessary for testing of any high voltage components like vacuum tubes, high voltage capacitors, vacuum relay

A collection of modifications for the Icom IC706 transceiver

LPI personnel have combined experience over many years in servicing customers throughout the world. Our experience covers projects in some of the most lightning prone areas.

The antenna in this project is a modification of the techniques used to design a multiband fan type dipole with little or no tuning involved having a total space of 105 feet

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.

European version of the ICOM IC-7610 leaflet in A4 Format PDF File

Kingston, Ontario, Canada A RAC Affiliated Club

Pictures, design plan and description of a 5 element yagi antenna for the 4 meters band by 9A7PJT

A keyed piezo beeper, connected to the microphone jack of a HT, appeared feasible as a ready-made MCW generator.

A project for a vertical antenna for 60 to 20 meters by KV5R

The Hermes-Lite is a low-cost direct down/up conversion software defined amateur radio HF transceiver based on a broadband modem chip and the Hermes SDR project. It is entirely open source and open hardware, including the tools used for design and fabrication files. Over 300 Hermes-Lite 2.0 units have been successfully built.

Maxdao: offer you 7/16, N coaxial connectors, jumper cables, feeder clamps and grouding kits, surge arresters & brackets, wall entries and microwave components used in base tower, power dividers, couplers

The workaday world of antenna & tower projects. Posted by K4ZA, Tower Works, Charlotte NC.

A Progressve Communications Receiver by W7ZOI and K5IRK. First published in the November 1981 QST

This site was established to encourage hams, especially the newcomer, to share the enjoyment that comes from owning and operating Collins

Tti is thurlby thandar instruments who manufactures advanced electronic test equipment for sale in the uk and throughout the world.

Central Oregon DX Club N7LE

We encourage ham radio operators to try something new with the hobby.

Automated use of EZNEC. AutoEZ is an Excel application that works in conjunction with the EZNEC antenna modeling programs and allows you to use variables to control diverse aspects of the model. You can then run multiple EZNEC test cases while AutoEZ automatically changes one or more variables between runs. Commercial version and free demo available for download.

A browser based circuit simulator offering a large set of functionalities allowing to share and discuss designs

QSL printing service operated by OK1FXX in Czech republic

Manufacturer of Repeater Controllers, Repeater Tone Panels and Telephone Interconnect.

This low pass filter terminates all harmonics from the 2nd to above the 10th harmonic in a better than 15 db return loss load

DX from JA6 area

This LPDA calculator is based on the design procedure as described by L. B. Cebik, W4RNL (SK) in the 21st edition of The ARRL Antenna Handbook.

OpenHamClock is a modern, open-source dashboard for amateur radio operators, designed as a web-based successor to the original HamClock. Deployable locally on a Raspberry Pi or via the cloud, it centralizes essential DX operations into a single, intuitive interface. At its core is an interactive world map that visualizes real-time DX spots, signal paths, satellite tracking, and POTA activators. The software seamlessly integrates critical tools like WSJT-X, DX Cluster, and PSKReporter for monitoring digital traffic. Additionally, it provides vital environmental data, including real-time space weather indices, solar activity, and personalized HF propagation predictions. With customizable themes and a modular architecture, OpenHamClock offers modern operators comprehensive, at-a-glance situational awareness of global radio conditions

Evaluates the **LDG Z100 autotuner**, a device designed to automatically match antenna impedance for optimal transmission efficiency. The review discusses its performance in comparison to the MFJ-902, noting that while the Z100 is a reliable autotuner, it does not match the range of impedances that the MFJ-902 can handle. The Z100 is suitable for operators seeking a 100-watt autotuner that covers HF bands, providing a practical solution for those who require automatic tuning without manual adjustments. The review highlights the Z100's operational context, focusing on its use in HF bands and its practical application in amateur radio setups. While it offers a straightforward tuning process, the Z100's limitations in impedance matching are noted, making it less versatile than some competitors. This comparison provides valuable insights for operators considering an upgrade or replacement for their current autotuner. The Z100's performance is positioned within the broader market of autotuners, offering a clear perspective on its strengths and weaknesses in real-world amateur radio operations.

A simple VHF quarter wave antenna from PL25

This is a neat little adapter that allows the use of a cell phone type Headset with your Amateur Radio.

Tips and advice compiled from The DX Reflector

Ham Radio fonts that have the slash zero also morse code fonts

A simple kit for temporary, lightweight, wire tactical antenna systems is essential for any field Ops. Described in this article a kit as it fits in a standard US Military M-1956 Butt Pack

This group is for any Amateur Radio Televison Enthusiast. From 70Cms - 13Cms and above.

A 144MHz FM class C RF Power Amplifier based on a 2N6084 RF transistor, that can produce 50w output max

Por una Radioaficion unida y solidaria . Uruguay

DTMF Remote Controls, DTMF tone generators and broadcasting products, remote broadcasting via cell phone, cell phone mixer and remote phone keypad

Programming software for the Yaesu FT-60(R)

An attempt to make a capacitor out of kitchen foil and cling film

How to receive automatically NOAA wather satellite images with a Raspberry Pi and a RTL SDR. This project requires a Raspberry Pi 3 Model B a common NooElec SDR Dongle and a QFH Antenna in the attic. Article explains how to setup and configure software but no instructions on antenna.

This is an on-line rf attenuator calculator provided free in order to promote the FLEXI-BOX. Calculates the resistor values, attenuation, minimum attenuation, impedance, reflection coefficient, VSWR and return loss of a matching Pi attenuator

Information about setting up a Solar Powered Ham Radio Station.

Southern Michigan Amateur Radio Society Battle Creek,Michigan

DesignSpark PCB is the world's most accessible electronics design software, specially designed for Rapid Prototyping and turning your circuit ideas into testable boards faster. Easy to learn and easy to use, DesignSpark PCB is free and can you can download DesignSpark from this site.

Icom IC 756 Pro 3 English User Manual in a PDF file

SWR or VSWR - the most widely known yet most misunderstood terms in Amateur Radio. Article by GW6ITJ

Schematic for a 1200/300 baud modem for baycom compatible software

An RF Probe project by N5ESE

Windows shareware Log program for the IARU HF Contest

Experimental Software for the Yaesu VR-120 and Yaesu VR-120D Receivers