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

70cm-Longyagis in 28Ohm-DK7ZB-Design

Design that can be mounted on a mast underneath an existing beam.

Based on DL6UW Yagi antenna's design-formula The forward gain is 13.6 dBi (about 11.5 dBd) and it's pretty small, about 1,5 m in length

DF3CB site, contesting, and software BV is a professional freeware software for the QSL Management and Label/QSL Printing under Windows developed and distributed by Bernd Koch, DF3CB, since 1989. It is mainly designed for the contester and QSL manager with high QSL quantities but useful for all other QSL'ing purposes as well. Includes logging features

Here is an antenna for the nineties. It's strong, computer designed, and has lots of gain. It is a full size, four element beam on 10, and three elements on 15 meters

Alfa Tango DX is a premier resource for operators on the 11 meters band, providing a searchable database that includes news, cluster information, and discussion boards. This platform serves as a hub for DXers and contesters, offering valuable insights into activations, dx-peditions, contests, and meetings worldwide. The site features a variety of resources, including event calendars, award programs, and tools for logging contacts. Members can access exclusive content and participate in contests like the AT Women's Day Contest and the Eleven World Wide Contest. With a focus on community engagement, Alfa Tango DX fosters connections among operators and promotes the spirit of amateur radio. Whether you are a seasoned DXer or a newcomer to the 11m band, Alfa Tango DX provides essential information and support for enhancing your amateur radio experience. From QSL services to event participation, this resource is designed to meet the needs of all operators interested in the 11 meters band.

Projects and design atv de ik1hgi Progetti, circuits, master, fotos in Italian

This free program by SP7DQR is designed to print QSL Cards using Mail Merge Tool in MS Word from ADIF file.

VHF-DX for Win95/98 is a VHF/UHF Logging Program specifically designed for 50MHz and above operation.

Construction Details for 50MHz-Yagis in DK7ZB-Design

Based on original G2BCX design this J-Pole antenna for the six meter band is made with a homemade ribbon cable. The antenna shown in this article includes a coaxial cable choke feed to remove RF currents from flowing on the outer of the cable.

This program has been designed for packet communication with ISS (International Space Station), PCSat or 'compatible' satellites with ease... Ideal for any UI packet communication.

The document provides a detailed guide on modifying an inverted-L antenna to include the 160 meters band. This enhancement allows amateur radio operators to utilize the lower frequency effectively, which is crucial for long-distance communication, especially during the night. The inverted-L design is popular due to its compact size and ease of installation, making it suitable for various environments. By adding top band capabilities, operators can engage in DXing and contesting on 160m, expanding their operational range and opportunities. The guide includes practical tips and considerations for construction, ensuring that the antenna maintains its performance across the extended frequency range. It discusses the necessary adjustments and materials required for the modification, along with potential challenges and solutions. Whether you are a seasoned operator or a beginner, this project can enhance your station's capabilities, allowing for more versatile operations and improved signal quality on the 160m band.

G3WZT design for a bi-polar 600W Linear Power Amplifier for the 6M band.

Over 47 full-screen maps are available within _NAOMI_ (North American Overlay Mapper), a free Windows program designed for US and Canadian amateur radio enthusiasts. This mapping suite includes 9 backgrounds such as CQ Zones, ITU Zones, and ARRL Sections, along with 16 foreground layers like Counties, Areacodes, and Grid Locators. Users can calculate distances and bearings, track real-time mouse positions with continuous Grid-Locator data, and integrate with APRS for live station tracking via the FindU database. For a global perspective, the _Global Overlay Mapper_ (GOM) provides a world map, 8 continental maps, and 29 sub-continental maps, all with 12 active layers including Country Outlines, CQ/ITU Zones, and Prefix information. Both NAOMI and GOM offer feature-locate systems to jump to positions based on prefixes, capital cities, or Grid Locators, and provide customized beam headings and distance displays. The site also features _LogView_, a post-contest log visualization tool that analyzes Cabrillo-format logs by plotting QSOs on maps, supporting over 30 major contests like CQWW and ARRL DX, and allowing comparison with published results.

A trapped dipole antenna based on the orignal W3DZZ antenna design resonating on 80 40 20 15 10 meters

A page dedicated to antenna coil home brewing and coil design by VE6WZ

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

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

PicCon is a PIC microcontroller based radio controller designed for hidden transmitter hunting

This simple and cost effective interface circuit is designed for use with any ICOM amateur radio equipment with CIV interface

Log2000 is a program for logging and tracking QSO's, creating and printing QSL's and QSL labels. Designed for Windows 95/98, Windows NT and Windows 2000.

Interesting article on how build your own field day antenna

The grounded half loop describe in this article is basically a half wave length wire on 80 Meters. The 80M grounded half loop antenna, inspired by a 1984 QST article by SM0AQW, is a compact solution for limited spaces. Comprising a 127-foot wire fed against ground and supported by radials, it balances performance and practicality. Despite compromises in length and proximity to structures, the antenna delivers strong signal reports and effective multi-band tuning using an SGC 237 antenna coupler. Ideal for CW operation, it offers low SWR on 80-10M, though noise levels and safety considerations warrant attention. This versatile design excels in constrained environments.

ATV 432 MHz AM transmitter schematic

Squirl field day logger - a no-frills, easy to use software logger designed for field day logging operation. by KC8OPV

The County Hunting software, version **6.1**, is designed for amateur radio operators focused on USA-CA Award tracking and logging. This application supports _Windows_ environments and facilitates the import and export of ADIF files, enhancing QSL management by integrating electronic confirmations via LoTW and e-QSL. The software has been updated to align with the new award rules managed by MARAC, following the discontinuation of CQ magazine's involvement. Users can visualize QSLs post-scanning and benefit from enhanced ADIF import functionality. Version 5.4 introduced accelerated county searches via FCC databases, with filters for QSL confirmations and e-QSL enhancements. The software also includes a feature for backing up and restoring QSOs by LoTW confirmations. Visual County tools have been refined, offering improved map interactions and the addition of county flags. The software supports various digital modes including FT8, FT4, and SSTV, and includes functionality for PSK250 and 60m bands. The application is multilingual, with support for Italian, English, French, and Spanish, and provides automated updates and web-based county searches. DXZone Focus: County Hunting | ADIF | Windows | LoTW

C-Poles for 20m and 6m, it is a folded half-wave dipole with an asymmetrical tapped 50-Ohm-point in the lower part of the antenna. Design hints by DK7ZB

This is a page designed to help the EMCOMM operator thinking of going portable. It will describe a way of having VHF UHF HF voice and digital in one box

Design for a dual-band CW transceiver using the AD9834 Direct Digital Synthesizer

How to design narrowband bandpass filters

LogHX is a freeware windows ham radio logger software, designed as complete Ham Radio environment. Radio control interface, online log book interfaces, cluster access, adif and cabrillo exports, antenna rotor control, Digital CW and SSB macros, full QSL management

A Batwing Antenna Design Challenge

An easy to build with a cheap HEMT FET Transistor Low noise preamplifier with FHX35LG based on JH0WJF design

An unconventional antenna family, the VHF/UHF Zigzag Dipole Antennas. Design, theory and practical construction, transformation and balancing with a half wave balun.

pythonProp is a collection of Python scripts designed to plot files produced by VOACAP. The package currently contains two scripts, both of which make use of the matplotlib library

NBTV (Narrow Band Television) is a technique with some similarity to SSTV, and some to conventional FSTV (Fast Scan TV). Like SSTV, it operates in a narrow bandwidth, suited to an HF SSB transceiver, but rather than send individual image frames, NBTV is designed to send multiple frames one after the othe.

A simple charger designed for charging 12 V sealed lead acid batteries, used by radio amateurs for portable operation Amp-Hr Class used by radio amateurs for portable/emergency operation.

A bazooka coax antenna for 40 meters band design by CA6TYS

The ZL1BPU Rotator Controller has been designed as an add-on unit for the popular Kenpro KR-400 and Yaesu G-400 rotators. The controller consists of a small circuit board which fits inside the rotator control box

Designing your own QSL card is now easier than ever. This is a Program that helps you design and then Print your QSL cards filling them automatically with QSO data.

Such kind of omnidirectional antenna gives the possibility to be QRV with horizontal polarisation, as commonly used for the CW and SSB section of the 2m band. This actual design shows a 1.3:1 bandwidth of about 150kHz, centered to 144.200MHz.

Ian G6TVJ design for a synthesised ATV transmitter covering the 13cm band and beyond up to about 2.6 GHz.

Design for a quarter wave vertical antenna, for the top band in use at V31YN

Provide quality QSL design and print by very attractive prices.

This 6 meter 2 element yagi antenna is simple, compact and effective antenna for 50 Mhz. The design antenna was optimized with AO for best match to 50 ohms, no matching network. A choke balun is recommended to decouple feedline currents.

BKLog is a versatile log book and contest program designed specifically for amateur radio operators. Developed in VB.NET, it offers a user-friendly interface and a range of features that cater to both casual and competitive hams. Users can log their contacts, manage contest entries, and utilize automatic CW sending, making it a valuable tool for any operator. One of the standout features of BKLog is its integration with DX Cluster access, allowing users to stay updated on DX spots and enhance their operating experience. Additionally, it supports uploads to popular online QSL services such as QRZ, LoTW, and Club Log, streamlining the QSL process for users. With regular updates and improvements, BKLog continues to evolve, ensuring it meets the needs of the amateur radio community. Whether you're a seasoned contester or a newcomer to logging, BKLog provides the essential tools to enhance your ham radio experience. Its compatibility with Windows makes it accessible to a wide range of users, and its ongoing development ensures that it remains relevant in the ever-changing landscape of amateur radio.

Antenna design for Horn Antennas