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Beaconmap is a Win95/98/NT program to help listeners to identify the beacon stations of the NCDXF/IARU beacon network. The program displays a flashing dot at the location of the beacon that is currently transmitting. The call sign of the beacon, as well as the QTH is shown in the status bar. By PA1ARE

A live police broadcast for the Detroit area police department. Michigan Public Safety Communications System (mpscs)

HB9MTN Capacitive antennas for 40m, 30m AND 20m

How atenna tuners works and what are real effects on feed lines and maximun power output by G3TXQ

A circuit which had been used in many other application before. The configuration described here is optimized for IPHONE/radio operation.

This computer control program is specifically designed for the Yaesu FT-920 transceiver. Freeware windows application.

2E1EHM web site with a collection of pictures. You can download from this site to add to your SSTV picture library.

At the moment the most used program is UA1AAF. It is an excellent program written by Boris, UA1AAF, to handle ARI International DX Contest. It can simulate K1EA or N6TR workings; it will be possible to connect the RTX to the computer using a standard interface in such a way as to transmit directly in CW from the keyboard; most of the controls are like K1EA's CT and N6TR's TR ; on line help provides almost all the information necessary for using the program. Is possible to insert QSO after the contest. An appropriate utility in included for conversion in ADIF format. The program is very small and therefore works without any problems on any IBM compatible computer with DOS 3.3 and over or Windows 95/98.

Annual Cherryville Repeater Association Hamfest, North Hunterdon Regional H.S., Route 31 South, Clintion Twp USA

Magnetic Loop antenna for broadcasts band reception

Amateur radio propagation studies (science, research, engineering, operating) and the BeamFinder propagation analysis software

Alford slot antenna for 1.3 GHz to 2.3 GHz.

DIY a Wi-FI Helical Antenna for better performances, a project by PA0HOO i Dutch end English

Amateur radio open source log program written in PHP. Put your log online for visitors to browse in real time. Access your log from any web browse, can run under windows linux and macos with apache, mysql and php

The Collins 516F-2 is a heavy-duty power supply for the KWM-2/2A transceivers and the 32S-1,2,3 series of Collins transmitters.

Qucs, briefly for Quite Universal Circuit Simulator, is an integrated circuit simulator which means you are able to setup a circuit with a graphical user interface (GUI) and simulate the large-signal, small-signal and noise behaviour of the circuit. After that simulation has finished you can view the simulation results on a presentation page or window. Run on Linux.

The utility "NEC-2 for MMANA" is intended for calculation of antenna models made and optimized in program MMANA and for construction and simulation of antenna models using input language NEC-2 and based on MMANA models.

Simple circuit, with a simple push, transmit a memorized Cw messages

This circuit consists of microphone amplifier and a high pass filter. Suitable to improve signal readability.

Repeaters available in or near Ridgecrest California, Amateur Radio License Examination Schedules

10 Meter Beacon, 28.288 mhz Hurricane Uta USA

Adjusting audio output of your soundcard to obtain a perfect PSK signal from your transmission. A project to help you tuning your PSK31 emission.

The Quadlong antenna for the six meter band. This antenna feature a total gain of 6,4 dBd, F/B 21 dB and is also available in 70MHz version. Includes detailed pictures and plot diagrams.

Accurately determining an antenna's feedpoint impedance is crucial for optimal performance, especially when experimenting with new designs or making adjustments. While SWR meters provide basic information, a full complex impedance measurement reveals the resistive and reactive components, which are essential for proper matching. Modern antenna analyzers, like the _Palstar ZM30_ or MFJ259B, simplify this task, but measurements taken through a transmission line require careful interpretation due to impedance transformation. This resource details a calibration method to precisely account for the effects of the feedline. It explains how a transmission line can significantly alter the measured impedance, illustrating this phenomenon with a Smith Chart example where an 80m antenna's [22 + j6] Ohms feedpoint impedance transforms to [82 + j45] Ohms after a 10m line. The guide demonstrates using a transmission line calculator applet, such as the one by W9CF, to reverse this transformation. It outlines the process of calibrating a specific length of RG174 coax, showing how an initial 26ft estimate was refined to **25.85ft** to accurately predict a known 22 Ohm load, significantly improving accuracy over uncalibrated results.

A web-based forum for all aspects of Amateur Radio.

There is not a personal design on this page, just I've transfered useful notes from PHILIPS RF Bipolar Transistors - Data HandBook about BLY89C VHF Power transistor, which is very popular among Amateur Radio homebrewers

A 4 elements handitenna for 70 cm band. This is my version of the K5OE Handitenna. This one is a four Element instead of three, as I had less of a crunch on space than he did. The 1st three elements (Reflector, Driven Element, and Director 1) are the same dimensions as his were.

How to identify correct version of your TS-570

RF Power Meter using for reading a standard Digital Voltmeter by Iulian Rosu, YO3DAC / VA3IUL

Personal Web Site of UX7CQ. Information about Ukraine. Old military radios collection. CW Straight Keys.

Ham Radio community web site

A very simple receiver project by PA2OHH

KA9LXP's HF antenna mast page

This article describes a simple Inverted L antenna for the HF bands designed to work on 80m, 40m, 30m and 20m

Australia, Sydney Fire information and monitoring website, Live sydney radio fire stream.

Live streaming audio of the K7ICU repeater

A SSB CW transceiver for six meters band with schematic and block diagram

PCB for the DJ9BV Power Meter taken from DUBUS 3/87

Approximately 800 x 600 resolution is recommended for optimal viewing of the _Connecticut Radio Society_ (W1CRS) website, which serves as a hub for active amateur radio operators. The site encourages participation in club activities, particularly emphasizing operating events and contests. It provides a digital presence for members and prospective members interested in local ham radio engagement. The society's focus includes general amateur radio operation and competitive contesting, aligning with its classification as a contest club. The resource is designed to foster community among hams in Connecticut, offering a point of contact for those seeking to engage with fellow operators and participate in organized radio events. The club's callsign, W1CRS, is prominently featured, signifying its identity within the amateur radio community.

Myths and basic truths on transmission lines

Make your own loading coils for antenna projects using Caterpillar Grommet strips.

Association with free membership for telegraphy lovers across the world.

Ham Radio Class On-Line. A complete On-Line Course for the Technician, General or Extra Class amateur radio license.

A magnetic longwire unun with a T130-2 Iron Powder core by M0UKD

conversion of low band VHF Philips FM-828 E band down to 6 metres

Battery problem with TS-570

W0IPL experiences with Ten-Tec Jupiter

An easy portable VHF antenna to build for ARES - RACES work is the 300 Ohm Twin Lead JPole antenna

Calculate power loss depending on coax cable you use

This little project will make a portable 28 Volt DC power supply using two 12 Volt, 4.5 Ah rechargeable lead-acid batteries