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This is a simple calculator for solving the antenna wire catenary between to end points given the design wind speed, mass per unit length of the wire, wire diameter and Gross Breaking Strength of the wire.

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

Based on the N2PK design, this swr meter use a stockton directional coupler

Eham IC-718 reviews

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.

Yaesu official FT-100 icons sheet

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

Morse Keys by Gordon G4ZPY

Simple implementation of the ARRL Antenna Book design equations for the axial-mode helical antenna.

D-PRS converts these position reports from remote D-STAR radios to an APRS format. Windows .net application

A one-tube battery-powered regenerative receiver.

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.

The DXrobot, operational since 1999, offers a free, non-commercial service primarily for the VHF ham radio community. It specializes in automatic real-time E-skip warnings for **144 MHz** in both Europe and North America, delivered via email or SMS. Additionally, the system provides automatic aurora alerts for _50, 70, and 144 MHz_ openings through the same notification methods. Beyond real-time alerts, the DXrobot facilitates the reception of the latest DX-cluster spots via email, a feature useful for operators without immediate WWW or cluster access. The service also displays recent E-skip and aurora spots detected by the DXrobot on 50, 70, and 144 MHz, with updates every five minutes. Historical data includes lists of all DX spots from the previous day on 50, 70, and 144 MHz, updated daily. Key propagation data, such as MUF timeline, Solar X-rays, Geomagnetic Field, and Estimated Kp index, are also presented.

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.

7.5 MHz wideband audio delivered via AMC-7 satellite transponder 5 provides a robust platform for disseminating amateur radio news. This service caters to operators seeking timely updates on regulations, technology, and DX news. The bulletin is accessible in both MP3 and RealAudio formats, ensuring compatibility with a wide range of devices and listening preferences. Regularly updated content keeps amateur radio enthusiasts informed about the latest developments in the hobby. The service covers a broad spectrum of topics, including contesting, digital modes, and antenna technology. By leveraging satellite and internet distribution, it reaches a global audience, making it a vital resource for operators worldwide. Listeners can expect a consistent flow of information, with new episodes released frequently. The service's commitment to providing high-quality content ensures that amateur radio operators remain well-informed and engaged with the community.

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

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

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.

Lot's of antenna planning software mainly in dos version by G4FGQ.

G3WZT design for a single stage bi-polar 100-150W Linear Power Amplifier for the 6M band.

3 Band vertical Marconi-antenna for the bands 40, 80, 160 meters with a ground net of wires as radials.

This article explores a theoretical model for the losses of an 80m / 40m trapped inverted V dipole antenna system using a bootstrap coax trap, but does not examine the pattern of the antenna.

EI5FK tower project

Antennas and homebrew ancilliary equipment

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

A 5/8 vertical groundplane antenna for 50 mhz

The Contesters Choice

Article about magnetic loops, construction notes and diagrams

WY3A Homebrew G3TXQ Hex Beam for 5 bands

Hints about Jpole Yagi and Quad antennas

A micro processor interface that converts PC keyboard code into Morse code

Amateur radio club serving NEW YORK area. Club has fully equipped station,holds two hamfests a year,ve exam ,field day and contesting.

The Thracian Rose Club has been created in the Roses' City Kazanlak (Bulgaria) in 1993. Its main goal is to promote contacts within the radio community members (HAM, CB and SWL).

Eham reviews of the popular Yaesu FT 847

Build a Data Cable for the Yaesu VX-6

Contest adjudication software scores Cabrillo logs. Auto evaluates up to 2000 logs with duping, claimed score, actual score, cross checking, N-QSO rule, 5-min delta QSO rule. Support including code changes, non-scoring logs troubleshoot and summary output requests.

A schematic design of the W3DZZ antenna in portugues with description of trap building

Document explaning the differences between Iambic mode A and B