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

A very simple receiver project by PA2OHH

KA9LXP's HF antenna mast page

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

Association with free membership for telegraphy lovers across the world.

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

Battery problem with TS-570

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

A power line noise eliminator designed to eliminate QRN expecially on 40 meters band.

This page describes a DC to DC voltage converter, pretty simple, for currents up to 500 mA by sv1bsx

The GM4JMU Shortened 7Mhz Dipole

3 band mobile antenna - 10m full size wave/4 whip - quick tilt-down system for 20 and 15 m loading coil change by IZ7DJR

For macOS users engaged in amateur radio operations, a robust logging solution is essential for tracking QSOs, managing contest entries, and handling QSLs. RUMLog addresses these needs by providing a fully featured logbook program designed specifically for the Apple ecosystem. It integrates capabilities such as transceiver control for popular Icom, Elecraft, Yaesu, and Kenwood rigs, CW keyer interfacing, and real-time DX cluster monitoring. The software also includes mapping functions, callsign checking, and extensive import/export options for various log data formats. RUMLog's design supports both general logging and specialized contest operations, offering tools for efficient entry and submission. Its QSL handling and printing utilities streamline the confirmation process, a critical aspect for award pursuits like _DXCC_. The program's ability to interface with a wide array of transceivers via _Hamlib_ or proprietary protocols ensures broad compatibility, allowing operators to leverage its features across different station configurations. The free availability of RUMLog makes it an accessible option for macOS-based hams seeking a powerful logging utility.

VectorFox is a software born to incorporate a PC into the fox hunting environment. VectorFox is able to take inputs from up to 5 sources, such as a 2m beam, a 2m signal meter, a TDOA, etc, and display the results on the screen. VectorFox also accepts Agrelo inputs. From these results the operator can choose which indication is best and have a line drawn on the map in the direction of the signal.

Collection of telegraph keys homebrew antenna projects links to radio software

Mailing list post about Yaesu ft-100 knobs

TNC virtual phone modem driver for windows 95, known also as TFSlip95

DIY voice keyer for your next ham radio contest. An interesting homebew voice keyer project by ON7EQ

The society representing the interests of Amateur Radio in Northern Peninsular Malaysia

UR5FCM Log provides a centralized logging solution for amateur radio operators, designed to manage daily radio communications and integrate various digital modes. This software functions as a primary working center for a radio station, facilitating the recording and management of QSOs across different operating aspects. Since version 1.1.61, UR5FCM Log has incorporated enhanced features for digital mode operations, specifically supporting RTTY, BPSK, and SSTV. The application aims to streamline the logging process, offering tools for QSL management and general station record-keeping. It is developed for the Windows operating system, providing a graphical user interface for ease of use. The software includes capabilities for tracking various contact details and supports common amateur radio data formats for log exchange. Its development history spans from 2002 to 2005, with Igor I. Krinetsky credited as the author.

Balun case construction, tipically to host toroid cores. Size of case depends on power to handle. By DL5DBM

This ia a home built Magnetic loop antenna which was used by G3BGR, indoors on 7,10 and 14Mhz. The basic idea was in Radcom 1986

Presents a dedicated online callbook for Romanian amateur radio operators, compiling an extensive database of YO callsigns. It details information sourced from the _Agentia Nationala de Comunicatii_ (ANCOM) and user submissions, including callsigns, names, postal addresses, email contacts, and even photographs. The resource currently lists **10,768** YO callsigns, with **4,987** authorized by ANCOM, offering a centralized lookup for the Romanian amateur radio community. This platform also includes special event callsigns like _YR8D_, acknowledging their importance for QSL information sought by international DXers. It provides categorized lists of YO hams by county, a section for SWLs (radioamatori receptori), and a directory of YO radio clubs and associations. Users can submit updates or corrections via an online form, with validation typically processed quickly, often within minutes, ensuring the database remains current.

Description of my mobile HF/VHF station

Where to look on the Bands for SSTV

W3EDP antenna assembly instructions and dimensions with pictures in this PDF File

Some hints and tips on QSLing

VK2KFJ amatuer radio information pages, including packet radio, six metres, radio modifications, local repeater lists.

Club Information, Membership roster, officers, meetings, field day and more.

by Steve Hicks N5AC and Jim Boehner N2ZZ

Have you problem with your RG cables ? This page describes a smart antenna box using an RG-cathode for 3 antennas. The remote control needs just a simple wire and the GND for remote-control

The _Egyptian Amateurs Radio Association (E-ARA)_ provides a directory of its members, detailing callsigns such as SU1AL and SU1ER, along with their full names and QSL routing instructions. Each entry typically includes a postal box or street address in cities like Giza, Cairo, and Port Said, facilitating direct QSL card exchange. Specific entries indicate QSL via home call for operators like SU1BH (A71BH) and SU1DZ (9K2DZ), while others, such as SU1MR and SU1SR, route QSLs through SU1ER. The list also contains details for operators with international home calls, including SU2RS, who QSLs via OE6EEG. This resource serves as a basic callbook for the Egyptian amateur radio community, offering essential contact information for local and international hams seeking to confirm contacts or establish communication.

ARRL Laboratory Expanded Test-Result Report Kenwood TS-570D

This document describes the DIFFERENCE of mode HAM to the official broadcast DRM standard

W5PC is an ARRL Special Services Club, ARES/RACES/SKYWARN in Weatherford, Parker County, TX

An interesting project of the popular IW3HEV antenna analyzer in and embedded solution by PA3CKR.

ON7YD slow CW and DFCW TX program for Windows, works with Argo. By Rik Strobbe

Radio Club ON4GDV, home page of Gang De Verviers, located in Belgium

One another useful Table for the HAM's practice.

Promoting interest in DX to the state of Arkansas and the world.

WI ham club partecipate in Field Day, sponsers an annual Swapfest held in August, and provides various repeaters.

In this article, the author discusses the importance of good transformers for Beverages, especially for common-mode isolation. The author recommends #43 ferrite for the transformer, and provides the turns required for different core types. The author also recommends using lower permeability ferrites for better performance at lower frequencies.

Here are some lengths and spacings for various direct connect beams.

40 meters band 5 watts transmitter, uses a 6L6 with a 6X5 rectifier and a 0D3 voltage regulator tube on the screen.

The South Brevard Amateur Radio Club is based in the Melbourne, Florida area and provides volunteer communications services to the public and provides a common organization for amateur radio operators in the south Brevard County area to operate under.

Schematic anc PCB for a fox hunting receiver for 80 meters band