Search results

MARS, Israel's Antenna and RF System manufacturer, flat antennas for cellular, military broadband, multiband MF high power antenna

J-Pole Antenna by K4TAX

The concept of the "Hula Loop" came after many years of building medium wave loops of varying size, shape and performance. Usually these loops are constructed on a square wooden frame, with wire being wrapped around the periphery

A shortened dipole for 40 meters band by Martin E. Meserve

Page on amplification topics. From vacuum tubes to various components, discussion on stability and arcin causes.

A multi-band inverted-V dipole for portable operation by GM3VLB

LogView is a free post-contest log-visualisation tool, for analysing contest performance. It plots the QSOs in a Cabrillo-format contest-log on to one of 8 different maps by finding the position of each QSO from an online database of about 970,000 W/VE callsigns.

Gary Breed, K9AY experience with beverages on 40 meters

We are Western Canada's LARGEST Amateur Radio Retailer. Although we specialize in Amateur Radio Equipment, we also have equipment for the scanner enthusiast. For our commercial customers, we have Land Mobile Avionics and Marine radio equipment.

Xcorder is a windows Freeware audio recorder written by MM0BFF, designed to work mainly with radio receivers but may be used also in several different ways for audio recording needs.

AEA Wireless Director Software Series turns PC's (running Windows 95/98/2000/ME or NT) into powerful tools that expand the use and power of SWR, Return Loss and Complex Impedance Analyzers.

A COM component for transceiver/receiver CAT control. Not a complete program, but rather a component tool that allow software developers to connect their program to a supported transceiver.

A marriage of the windom and slinky antennas, experimental home brew antenna by NC4TC

A homebrew fishing-rod vertical using a very nice design from EB5EKT. This antenna works 20, 30, and 40M bands by selecting the tap points using alligator clips

RF Path design software, tower coverage mapping software to evaluate radio transmitter sites, predict and simulate radio coverage, plan land mobile radio or cellular systems. Commercial RF coverage mapping software by Softwright llc.

A 2.4 GHz WiFi antenna that can boost your WiFi signals for many miles. It\'s an easy to build Yagi antenna project done with some popsicle sticks, paper clips and glue.

Quick reference table on understanding A K SFI indexes and how can be translated in usable frequency opportunities

RDXCluster is a free windows telnet client for worldwide DX packet Cluster,featuring multiple spot windows, Band/Mode DXCC window, DX History window, Top DX window, Find, highlights, filters the spot by Roberto Verrini

Located in France, DXBeam designs and manufactures a range of monoband, dual band and triband antennas, rotary dipoles, Moxons and Yagis

The Kenwood TH-F6A handheld transceiver can achieve an extended transmit frequency range of 137-174 MHz, 216-235 MHz, and 410-470 MHz by removing a specific diode and chip resistor from the main PCB. This modification also expands the receive range on the A-band to 142-152 MHz, 216-235 MHz, and 420-450 MHz. For the TH-F7E, the transmit range extends to 137-174 MHz and 410-470 MHz, with a corresponding receive range on the A-band. Performing these hardware changes will reset and initialize the radio's memory contents, necessitating prior backup of important channel frequencies. Instructions are provided for constructing a homemade PC programming cable compatible with the Kenwood TH-G71A, TH-F6A, and TH-F7E. The interface utilizes an RS-232-to-logic (0-3.3V) level-shifter and a full-duplex serial connection, adapting the Kenwood PG-4S cable schematic for the TH-G71's 2.5mm and 3.5mm phono plugs. Specific schematic tweaks include changing R1 from 150 ohms to 1K ohm to optimize power from the serial port and adding a 150K ohm resistor between the Radio TXD and ground to manage the 3.3V I/O pin. Detailed plug pinouts for the 2.5mm and 3.5mm connectors are presented, with the interface's TXD connecting to the ring of the 2.5mm plug and RxD to the shield of the 3.5mm plug. Ground connects to the shield of the 2.5mm plug, while the tips of both plugs are no-connects. Debugging procedures cover verifying positive and negative power rails from the serial port, checking component polarities, and testing level-shifting and inversion functions of the interface. Software setup involves enabling "TC ON" (Menu 15 for TH-G71, Menu 9 for TH-F6) and using Kenwood's MCP programming software.

Custom built amateur radio adjustable antennas and accessories. Screwdriver antennas, antenna controllers

MT63 soundcard program for Windows by IZ8BLY

This article is a follow-up of Dallas Lankford's article Icom IC-746 Pro: Impressions and Mods, published on www.kongsfjord.no and (partially) in the Swedish Short Wave Bulletin.

EchoMac is an apple macintosh client for EchoLink internet radio network.

The Duracell DR 36 laptop battery can be easily find and supplies 12 volts X 4 amperes. The main advantages on this system are, the weight, size, quick battery changing and no stress to the FT 817 power connector by PY1AHD

A resource for the Ham Radio Awards Hunter

Manufacturers of high performance low power am transmitter products: sstran amt3000, bc-100, and the mw-250. for home and professional use.

If the display lamps in your TS-2000 go out. They can be replaced with LEDs.

N3FJP's ARRL Field Day Contest Log 6.6.10 is a dedicated software solution for Windows 7 through Windows 11, specifically tailored for the annual ARRL Field Day event in June. This program provides essential contesting features such as duplicate checking, including partials, and a dynamic list of sections that change color upon being worked. It seamlessly interfaces with popular digital mode software like WSJT-X, Fldigi, and JTAlert via API, and supports rig control for most Elecraft, Icom, Kenwood, and Yaesu transceivers. The software also generates computer-generated CW via serial port or Winkeyer, plays wave files, and offers DX spotting capabilities. Operators can leverage its fully networkable design to allow multiple PCs to update a single log file simultaneously, enhancing club operations during Field Day. The program outputs ASCII log, dupe, and summary files for contest submission and provides real-time statistics. A quick start video is available to guide new users through the basics of the software. Registration for permanent use costs $8.99, or it can be obtained as part of the N3FJP Software Package, which includes over one hundred amateur radio programs for a one-time fee of $59.99.

Report of solar & geophysical activity

Article about magnetic loops, construction notes and diagrams

Free Morse Code CW training software for Android supporting the Koch method by IZ2UUF David

A complete list on Long Beach Frequencies. Long Beach Police Penal Codes, and Police 10 Codes

A Mini Moxon antenna for 40 meters band project in a well done PDF document

30/17/12 and 20/15/10-Meter Tribanders and a 40 meters inverted V wire yagi antenna

This page shows a homebrew vertical antenna based on the Pac-12 antenna design.

CW keyers, Logikey, and antenna rotator controll like rotor-ez, and active audio low pass filters.

The Coke Loop is a Small Magnetic Loop Antenna tuned by a trombone-style variable capacitor made with standard soda cans

This antenna allow transmission and reception on all bands between 7Mhz and 28 Mhz. Similar in concept to the Miracle Whip by VK3YE

Alpha 77D,DX,SX, Alpha 76, Alpha 78 and 374 repair service and upgrade kits

List of IOTA prefixes provided by QRZ.com

Pictures of a 2 meter, 220, 440 copper J-Pole antennas

Rewiew and notes on IC-756

The diagram below shows the basic arrangement of the 2m Half-Wave version of the antenna. A 6m diagram is available too.

W4TI review the popular Yaesu FT 857 quadriband transceiver

W4RNL tutorial on on inductively coupled (link-coupled) antenna tuners

This project outlines the construction of a 3-element reversible quad antenna specifically designed for the 40-meter band. The materials required include pushup towers, pressure-treated posts, insulated wire, and various electrical components such as relays and a balun. The construction process is straightforward, beginning with the installation of the posts in a straight line, followed by the assembly of the antenna elements and their elevation to the desired height. The antenna's design allows for directional signal reception, making it ideal for operators looking to enhance their communication capabilities on the 40-meter band. The project includes detailed instructions on tuning the antenna for optimal performance, ensuring that operators can achieve the lowest SWR possible. Additionally, the design can be adapted for other bands by extrapolating dimensions, providing versatility for amateur radio enthusiasts. Overall, this reversible quad antenna project is suitable for both beginners and experienced operators, offering a practical solution for improving signal strength and directionality in 40-meter communications.

Put up the longest dipole you can fit, feed it with open wire line, connect it to the balanced output of your tuner and poof! Instant multiband antenna. Is life really that simple?

Icom PCR1000 driving program for Mac available at yahoo groups, login required.