Search results

Manufacturer of custom belt buckles,coffee mugs,t-shirts,sweat shirts,maine gifts,name tags,call tags and awards for police, fire, sheriff, ham radio and amateur radio clubs

Free windows world map application display current time, sunrise and sunset, greyline map, dx stations, requires windows 7 or higher. The program includes three resized Natural Earth maps which have been resized to 4k or slightly less. By Simon Brown G4ELI better known as the inventor of Ham Radio Deluxe.

Basic information compiled and copied from NOAA SEC explaining and showing current solar weather conditions affecting amateur radio.

Microwaves articles, The Technology Voice of the Wireless World , need registration to access

Personal review of the Yaesu VX-6R handheld transceiver

This tutorial will show you how to connect a Morse key to the Raspberry Pi GPIO pins, and how to write code to play tones when you hold the key down. You will also decode the Morse that you're keying so that it comes up on the screen.

"W2IK's Personal experience being the first responder at ""ground zero"" during the WTC 9/11 disaster."

A Wire resonant loop antenna for 160 meters band article by N4KC

A comeplete home made 600W LDMOS RF power amplifier. Settings can be made on a 7-inch touch screen, and on this screen you can see a lot of useful information during operation, such as output power, temperature, SWR, and so on. The power amplifier includes 2 MRF300 LDMOS FETs and several built-in sensors. The amplifier also contains several types of protection functions like too high current, too high swr, too high temperature, etc.

This PDF document details the construction of a **70 MHz** Big Wheel antenna, a horizontally polarized omnidirectional array. The design utilizes three full-wave loops, each approximately **2160 mm** in diameter, arranged in a triangular configuration. The resource provides mechanical dimensions for the antenna elements and a comprehensive bill of materials, specifying component quantities and types, such as M8 stainless steel bolts, 15x15x1.5 mm square aluminum tubing for spacers, and 8 mm aluminum rod for the arcs. The central hub is constructed from two 160x160x8 mm aluminum plates, with four 40 mm long polyamide insulators supporting the radiating elements. The feed system incorporates a 50 mm diameter aluminum pipe for mounting and a matching stub constructed from a 120x20x2 mm aluminum sheet, connected via M8x10 mm bolts. The resource includes a diagram illustrating the mechanical dimensions and assembly points, including the N-connector fixing point and the center conductor attachment. The project was published on May 25, 2011, by Peter OE5MPL and Rudi OE5VRL. DXZone Focus: PDF | 70 MHz Big Wheel | Mechanical Dimensions | **2160 mm** loop diameter

W8TTH Welding & Machining , tower plates, side mounts standoffs, house brackets, torque arms.

Design and build custom electronics for clock enthusiasts, Juke Box collectors and the ham radio community. Produces radio interfaces, and radio upgrades.

Mountain Thunder CB Radio Group is a group of CB SSB operators that started in the Pacific Northwest, Washington State.

World Harvest Radio - South Bend, U.S.A.

A method of installing a PL259 coax connector, a complete tutorial on how to solder Amphenol 83-1SP connectors

Explore this high-resolution ITU Zones Map, a critical reference resource for amateur radio operators, international broadcasters, and telecommunications engineers. Originally established by the International Telecommunication Union – Radiocommunication Sector (ITU-R) Broadcasting Services Division (1999), this chart accurately divides the globe into 90 specific CIRAF zones. This authoritative visual guide is indispensable for planning High Frequency (HF) radio propagation, scheduling international broadcasts, and verifying locations for radio contests and awards. Distinct from the 40 CQ Zones, the ITU zoning system provides the official administrative framework used for global frequency management. This digitally enhanced version ensures maximum clarity of zone boundaries and numbering (e.g., Zone 28 for Central Europe), making it an essential tool for technical accuracy in logbooks and station management. It serves as a trustworthy standard for educators, hobbyists, and industry professionals alike.

The Kenwood TS-570D(G) transceiver (I), by Thierry Lombry, ON4SKY

International Brazilian DX Group

Global Lightning Technology - Malaysia lightning Malaysia surge protection system

The PAPA Amateur Radio repeaters are located on some of the best hill tops in Southern California!

Home of the Poor Man's Spectrum Analyzer

We are committed to constantly improving our solutions in areas of GPS System, GPS Receivers, GPS Antennas, GPS Dataloggers, RF Modules, Wireless Security Systems, Automatic Vehicle Location (AVL) for real time and passive tracking

Home Made CW paddles made from a printed circuit board and a teflon mounting block while contacts are made with simple brass threaded rods.

Js8Call is communication software designed for keyboard-to-keyboard message passing. Based on the WSJT-X application and implementing the FT8 protocol techniques, it's a separate project run on Linux, Windows and MacOS

Portable SSTV camera that takes a picture and transmit it with ham radio SSTV

HF beacon monitoring. Check world-wide propagation, updated every 15 minutes.

This article contains the measurements for building a full wave loop using wire and length of 1/4 Wave Coax Matching Transformer

Protecting the ham radio stations, using a good ground system

Most people are not familiar with antenna tuners and what a antenna tuner actually does.

10 meter dx map

Design and build an 6 m dipole antenna from aluminum, tubing, that resembles the active element of a yagi beam antenna.

There's no longer any need to invent new swear words

Online is a VT100/ANSI terminal emulator and Telnet client for Palm OS organizers. Connect to Unix systems, configure routers and reprogram embedded computers.

Amateur radio shop in Barcelona Spain

Software for ICOM D-Star Radios IC880H IC80AD

Ham radio blog dedicated to military radio equipment by EA3FOW

How to replace the lithium battery in this ICOM radio

With this tool it is possible to create QSO maps overlay on Google maps there each QSO get a line from the home location to each DX location. An EDI logbook file is used as input. The creation will only use complete locator in the 6 characters format.

Presentation by AC8GY on classic G5RV Antennas and other horizontal dipoles, the popular G5RV, ZS6BKW, dipole fan, Alpha-Delta DX-CC and a trap dipole are modeled in EZNEC and compared.

Testing SWR on your antenna and getting the best performance from your investment by L.D. Blake, VE3VDC

Homemade Loaded Coil Dipole ( w8010 diamond ) for 10, 15, 20, 40 and 80 meter

Antenna dealer, antenna masts, towers, mounts, antenna rotators, steppir and optibeam inrad dealer

Application for the Apple Macintosh computer that provides a CW contesting interface for the popular MacLoggerDX loggging software. FKeyer runs on MacOS X and uses an external keyer such as the MicroHam CW keyer.

The 2 metre fox-or transmitter is a small low power transmitter which mounts in a small plasic pipe and runs off two AA batteries. The board measures just 12mm by 70mm.

Dodgy plans to make Archimedean spiral antenna for RTLSDR software defined radio receiver. Made of two equal lengths of coaxial cable seems to be the easiest circularly polarized antenna to make that will cover a broad range of the rtlsdr dongles E4000 tuners

Batteries for 2-way radios two way radio laptop camcorder UPS and more. Purchase batteries for your laptop two way radio ups digital camera from Battery Universe.

An overview of some of the ways, and the key tips on how electronics soldered joints can be unsoldered or desoldered.

The lithium battery problem in the Kenwood TS-570

Martin Francis NDB K9AY mast project, with pictures and homebrewing details

Nifty! Quick Reference Guides and short form Mini-manuals and for Kenwood, Icom, Yaesu and Elecraft transceivers.