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Easy to use Audio Spectrum and PSK31 decoding program specially designed for SWL's who don't need TX or for anyone who just like to monitor PSK31 or analyse signals. Adjustable DSP and Spectrum settings for audio and frequency spectrum to set for best decoding of PSK31.

An article on TX and RX antennae for the low bands 80 and 160m by EI7BA

Collection of article and posts on beverage antennas

This Arduino project decode ICOM CAT frequency information and switch antennas according to preset values. RX and TX antennas can even be different, a project by ON7EQ

RTTY, Amtor, packtor, SSTV reference by WM2U

Great shareware software collection for ham radio, includes prefix finders, locators,frequency generators and links to other ham radio software.

Homebrew a vertical antenna for 40 and 80 meters band based on popular HF2V model by DL7JV

You've heard MS pings, of course. But what does a HSCW ping sound like?

This is a 70cm big wheel antenna which is used at DB0FAI beacon

MultiKeyer is a dedicated computer keying program designed for amateur radio operators engaging in specialized operating activities such as Earth-Moon-Earth (EME) and Meteor Scatter, as well as general contest operations. It provides distinct modes for both CW and Phone transmissions, enabling automated message sequencing and playback of pre-recorded audio files. The software's interface shares a similar "look and feel" to the popular WSJT Meteor Scatter/EME program, facilitating ease of use for operators familiar with that platform. For CW operations, MultiKeyer offers an EME Auto mode for sending timed messages crucial for EME and Meteor Scatter, alongside a Contest mode that handles automatic CQ calls and preprogrammed messages. On the Phone side, it features a Sequenced Phone mode for transmitting prerecorded .wav files during Meteor Scatter events and an Auto Phone mode for contest use. The program leverages serial COM ports for CW and PTT signaling, and the soundcard for .wav file playback, with configurable PTT interrupt options. MultiKeyer integrates with TRX-Manager for PTT and CW keying, and can send callsigns for logging. It also supports WSJT-style "callsign.txt" files for lookups and adheres to the SO2R protocol for parallel port connections. Designed for Windows 98 and NT, it generally functions on Windows 95, ME, XP, and 2000, requiring a 133 MHz Pentium-class processor.

1/2wave vertical antenna for the 6-meterband and a 5/8 ground plane antenna for 50 Mhz

How to build a multi-band dipole antenna with a single coax feed. Instructions for a 160M antenna that will fit in the space that a 75M dipole will with almost as good of results as a full size 160M dipole.

W3TS small but effective antenna tuner

This Magnetic Longwire Balun (MLB) makes it possible to efficiently use a coaxial lead-in cable with all forms of longwires, T-forms or other types of wire antennas, without the need for an antenna tuner.

If you have a computer with word processing software and a printer, you can make your own custom QSL cards, with each card individually printed for the ham you just contacted. WA7S show you how.

VE7CA experiments on 160 meters band antennas, looking for better performances on reception.

VU2RAR basic VHF power amplifier suitable for 144-146 Mhz output power can vary from 3 to 25 Watts.

Constructing a compact, two-band magnetic loop antenna for HF operation, especially from constrained locations like a balcony, presents unique challenges. OK1FOU's design, inspired by DJ3RW's 50 MHz loop, addresses these by employing an unusual side-fed configuration and placing the symmetric, two-section variable tuning capacitor at the bottom of the loop, directly connected to the coax shield. The article provides specific material recommendations, including two 1-meter wooden pales and about 3 meters of thick loudspeaker cable, noting the high current (60A at 100W) in the loop. Construction steps detail forming two turns with a 5 cm gap, using a GDO to pre-tune the open loop to a frequency slightly above the desired highest band, and then integrating the tuning and coupling capacitors. For 10/14 MHz, an open loop resonance of 16-17 MHz is suggested. Practical experience with the 10 MHz band from a third-floor balcony in Prague (JO70GC) shows a 1:1 SWR across most of the band without an external ATU. While DX traffic was modest due to the urban environment, QSO examples with RA6WF, LA6GIA, G0NXA, and LZ1QK on 10 MHz are provided, demonstrating its operational capability.

N7KSB used this 1/2 watt CW transmitter, with a roof-mounted ground-plane antenna to work all continents and over 30 countries

Homebrew 20m CW transceiver by MINOWA, Makoto 7N3WVM

Introduction to NVIS advantages and disvantags.

An antenna system is more easily interfaced to a radio when the input reactance at the feedline terminals is low or close to series resonance

Flexnet and AGW packet engine tested and reviewed by IZ7ATH

A greyline map that automatically refreshes every five minutes DX.QSL.NET

Easy to use Audio Spectrum- and PSK31 decoding program specially designed for SWL's who don't need TX or for anyone who just like to monitor PSK31 or analyse signals. Adjustable DSP and Spectrum settings for audio and frequency spectrum analasys or to set it for best decoding of PSK31 signals. By ON6MU

Launching a balloon or kite supported tall vertical or protracted inverted L.

By 9H1EL, supports RSGB 21-28, BERU, IOTA contests, FOC marathon and IARU 50MHz trophy, Control of FT1000MP, all Kenwood and ICOM Radios which have CAT system.

LOGvrr, a **freeware logging software** developed by IN3VRR, provides amateur radio operators with essential tools for managing their contacts. The resource details various downloadable components, including the core LOGvrr application, an international callbook with approximately 1.8 million callsigns, and utility programs for installation and data conversion. It supports functionalities like logging QSOs, managing awards, and interfacing with PacketCluster systems, with specific instructions for installation on Windows operating systems, including compatibility notes for Windows 10 and 11 using Hyper-V or DOSBOX. The site also offers external tools and documentation, such as the FAQ_VRR.PDF manual which covers installation, printer configuration, ADIF conversion, and Packet setup. It references third-party software like Mercurio and BV QSL Management for QSL printing, and ADIF2QSL for label printing, highlighting LOGvrr's ability to export QSOs in **ADIF format** for integration with services like LoTW. The resource includes historical updates, with the latest core component update in August 2014, and notes on the CallBook's maintenance up to 2015.

Various radio related software, including some antenna analysis, and impedance calculators.

Shareware program to receive and transmit high speed CW (morse code) used in MS (amateur radio communication mode) with MS Windows 95/98 and sound card.

How to make easily your N-type connector, pictures and procedure, step by step

Edited by Oz6OM to find out who's on 50MHz expeditions anywhere around the world. Most recent news on the web.

A table with Loss in DB/100m , Max power in Watts, Diameter in mm , Velocity factor (VF) expecially in VHF UHF and Microwave

IC-746 radio control program in italian and personale info

Thermocouple ammeters are very rare these days, but the job they were perfect for - measuring antenna currents - is still a modern requirement especially in respect to groundplane currents. By David A. Reid PA3HBB G0BZF

Improved Helical Antenna Design for 802.11b WLAN by PA0HOO

Dutch society of collectors of old ex-military radio equipment and other nostalgic receivers and transmitters

LogDDM, a freeware logging application, supports the tracking of over **100** different awards, including _DXCC_, WAZ, and WAS, directly within its interface. This software facilitates comprehensive log management for amateur radio operators, integrating functionalities such as a built-in callbook lookup, real-time packet cluster access, and direct rig control for various transceivers. It also offers robust import and export capabilities, primarily utilizing the ADIF format, which is essential for submitting logs to award sponsors or transferring data between different logging platforms. Developed by Giorgio, IV3DDM, the program is designed to streamline the logging process, allowing hams to efficiently record contacts and manage their QSL information. It provides a centralized hub for operational data, from initial QSO entry to final award application. Key features include detailed QSL management, support for multiple operating modes, and a user-friendly interface, making it a practical tool for daily operating and contest logging.

how to easy and quickly unsolder and recover electronic components from old electronic board (SMD and not) by iz7ath Talino

These pages are entirely devoted to the Kenwood TS570 series Transceivers. Specifications & Brochure, Pictures, Schematics, Reviews, Manual and Modifications.

Amateur Television (ATV) operations, particularly within the Arizona region, require dedicated resources for technical information, operational guidance, and community engagement. This club provides a focal point for hams interested in transmitting and receiving video signals on amateur bands. Members engage in local ATV repeaters, participate in technical discussions, and share knowledge on video modulation schemes, antenna designs, and station configurations. The club supports activities ranging from local simplex contacts to wider area repeater usage, fostering skill development in this specialized mode. The organization maintains a roster of club officers and offers membership opportunities to local amateurs. It also curates offsite links to other ATV resources, expanding the knowledge base available to its members and the broader amateur community. The club's emphasis on ATV helps propagate interest and technical expertise in a mode that combines traditional RF engineering with video technology.

VHF Optimized Yagi Antenna for the 6-meter band (50 Mhz) by ON6MU

A very compact receive antenna made with ferrite bars by PA0FBK

A useful tool to make PCB

This article refers mainly to the old Cushcraft 1/4 wavelength AV series of antennas (12AVQ, 14AVQ etc) hence the references to radials. The R series (R5, R7 etc) are 1/2 wavelength antennas, and the radials are NOT 1/4 wavelength resonant.

Geog is a suite of programs written by Andy Talbot ( G4JNT ), some of which make reference to a database of UK terrain heights, to provide useful information for radio amateurs

Easy to use CW Trainer for Linux. Adaptable for both the Koch and Farnsworth method of learning CW. Makes random tests or can read text from a file

no tune SSB/CW transceiver for 1296, 2304, 5760 and 10368 MHz

6x2 coaxial remote antenna switch, completed unit showing weatherproof relay box and station control unit.