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The page provides detailed instructions on how to build a double bazooka antenna for the 40 meters band. It includes information on materials needed, measurements, and assembly steps. The antenna can be configured as an extended dipole or an inverted V, offering low noise, wide bandwidth, and a 1:1 standing wave ratio. The content also offers calculations for other bands and includes photos of the antenna fabrication process.

This site is dedicated to mobile amateur radio operators, old and new alike. Whether you are into HF, or VHF operation, I trust the information presented will increase your enjoyment of our great hobby. With safety as a byword, there are articles on amplifiers, antennas, bonding, impedance matching, installing hardware, mobile equipment, noise and RFI abatement, wiring, and much more. I do my best to keep these articles up to date, and easy to follow.

Source of common model manuals and amateur help on amplifier problems for the amateur bands, Discussion of vacuum tube amplifiers. Technical information and discussion of obselete tube replacement.

Information regarding CB radio and the problems you may encounter during installation and use of your system.

A lot of good informations concerning antennas, filters, moonbounce, and circuitry data.

PDF resources containing information on low cost ssb,am,cw circuits, which are useful for beginners.

SolarHam is a website all about the Sun and how it affects Earth. This site is routinely updated with breaking news, sometimes hours before other Space News websites. You can trust SolarHam.com for the most up to date and accurate solar information on the net. SolarHam is a trusted and easy-to-use website for anyone interested in solar activity and space weather. It gives daily updates on <b>solar flares</b>, sunspots, geomagnetic storms, and radio blackouts. The site uses data from NOAA and NASA to show what is happening on the Sun and how it may affect radio signals on Earth. Charts and images are clear, and reports are updated often. Many amateur radio operators use SolarHam.net to check band conditions and aurora forecasts before operating. The site is fast, well organized, and focused on the needs of the radio community. Whether you are a beginner or an experienced ham, SolarHam.net is a helpful tool for understanding space weather and its impact on radio communications.

Frequency Filer is database program designed for people who use a great many different radio frequencies. It is primarily intended for amateur radio operators, short-wave listening enthusiasts and scanner users. The program makes it easy to keep all of your important frequency information in one place, displayed in a logical format to facilitate easy retrieval. Frequency information can be displayed as a list and can be viewed on a world globe. Other features include easy data backup and custom field names. Included is database import utility that can be used as a general file conversion utility. The globe display can also be used as general geographic aid for countries, cities, states, rivers, and lakes. You may even find your home town. Windows Shareware

RFI/EMI RadioFrequency interference/electromagnetic interference by ARRL Technical Information Service page

A web site dedicated to the K3LR contest station, a Multi Multi Station with 9 towers located in Western Pennsylvania. It provides information about the station components, antenna construction company, radio equipment used, and upcoming events like the Top Band Dinner at Dayton. The site also includes links to related resources like Contest University, Dayton Contest Dinner, and World Wide Radio Operators Foundation. The intended audience is amateur radio operators interested in contesting and DXing. The content is focused on promoting the K3LR station and sharing news and updates related to its activities.

Experimenting with the new way of building a radio receiver known as "software-defined radio". This page gives some information about this project.

Information about railroad radio channels and frequencies is provided along with laws relating to using scanners as well as tips and suggestions for programing and using radio scanners.

Cluster monitor is a tool for web and telnet clusters monitoring. The program shows spot history, the latest spots are shown in a separate window with full information about the DX, announcements, WWV propagation, and full sorting and filtering capability. Full support for AALog and AAVoice by RZ4AG, DXAtlas by VE3NEA. Integrated dial-up support. Price USD 25

Conversion notes and amateur radio firmware especially for Finnish PMR radios and cellular phones like Nokia, Mobira and Benefon. Also some information for other European brands (Ericsson, Key Radio/Kyodo, Philips) and an extensive link collection.

Online javascript antenna calculator designed to give the critical information of a particular beam antenna, in this case a seven element Yagi, for the frequency chosen.

The webpage provides information on a two-element Yagi antenna for 24 Mhz, created by IK4DCS. It includes details on the design and construction of the antenna.

Current HF band conditions online report and graphs. This page provides band condition information to CW and SSB Contesters. It can also be of benefit to other Radio Amateurs to determine band condtions for Nets and casual QSO

PocketPC freeware that track satellites, and display their position on a map of the world. It also has a display that shows other relevant information useful to Ham Radio operators to allow them to work them.

146MHz 5/8 ground plane tower mounted antenna. The antenna was largely based information and analysis provided by the RSGB's. VHF UHF Manual, fourth edition by G.R.Jessop, G6JP

JT65A frequencies. List of common HF frequencies where you can work JT65A.

The intent of this site to share information about the design of a 40 meter horizontal phased array antenna.

Developed by IZ3MEZ offer a click and show WW locator information using Google Maps API interface.

The page provides detailed information on coax stub filters for multi-transmitter setups, including specific lengths for different bands and types of coax. It also references additional technical notes for further analysis.

The document provides information on the Maria Maluca Antenna by dl8ncr, a small beam antenna fed with VHF ribbon line consisting of a dipole and a director adjusted for the desired band. It offers details on the construction and usage of this HF multi-band directional antenna.

The image is a all in one map of ITU Zones displaying worldwide regions and zones. It provides information on ITU Regions at IARU website, aimed at radio amateurs and technical users. Image size is in hight resolution and jpeg format, free to download.

Worldwide airports informations

Great resource wth reviews, articles, and other fun CB information.

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

Informations about Scannings, with frequencies, information about scanning, hardware and software reviews

Schematics and purchasing information for the Yaesu FT - 8x7 DIY Bluetooth CAT micro miniature interface done by YO3GGX

This is a Live DX Cluster map powered by google maps diplays a map of ham radio QSOs or contacts based on qra locator and dx-cluster spots information

ShipPlotter displays complete information about ships that are within VHF range of your position using the Universal Automatic Identification System (AIS).

A scanner resource for the Dallas-Fort Worth Metroplex including trunk information and a live scanner feed.

For radio amateurs engaged in propagation studies and DXing on the 6-meter band, understanding the distribution of active beacons is crucial for assessing band openings and signal paths. This resource presents a static map compiled by _Carl-Axel Lindberg, SM6NZV_, illustrating the geographical placement of European beacons operating on the 50 MHz band, which is vital for monitoring sporadic-E, F2-layer, and other propagation modes. The map, last updated in April 2002, serves as a historical reference for beacon locations, allowing operators to correlate observed signal reports with known beacon positions. While not real-time, it provides foundational data for analyzing past propagation events and understanding typical beacon coverage areas across the European continent. Operators can use this information to identify potential receive stations or transmit points for future _DX contacts_ on the _Magic Band_.

Finding tool, with APRS operators informations, diplays maps and wx info

General informations on FRS radios

Lets you listen to your scanner across your own network, or via the internet. Shoutcast/ICEcast compatible broadcasting for Uniden and GRE scanners. Broadcast your audio from your PC. ScannerCast is a specialized broadcasting solution that enables users to stream scanner audio feeds over the internet. This software supports both Uniden and GRE scanner models with tag information capability, while providing audio-only functionality for other scanners. Compatible with standard streaming protocols, ScannerCast allows remote listening via common media players without requiring specialized client software. The program features customizable tag display, adjustable bit rates, and seamless integration with Radio Reference. Its efficient design replaces multiple legacy applications while improving tag/audio synchronization. ScannerCast operates efficiently across various Windows environments, making remote scanner monitoring accessible from any location with internet connectivity. Scannercast is no more supported or developed by it's author.

Amateur Radio News and Information Bulletin Service delivered via satellite on AMC-7, transponder 5, 7.5 MHz wideband audio and over the internet in MP3 and RealAudio format.

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

The only existing 11 meter club located in the state of West Virginia. Offers great radio, antenna, and general radio information.

An interesting page about Quad antennas. Modelling QUAD antennas, comparing quad antennas to yagi antennas. Information on QUAD Antenna tuning and home brewing with help on calculating dimensions and tuning.

PMR446 radio information, news, reviews and forum. We also run a PMR446 gateway network using the eQSO system.

QSL extra offers QSL informations for every ardent dxer, with over 30.000 entries.

A free application that searches more than 100 web-accessible sources to locate QSL information for a callsign that you enter once

KB1GW's collection of beverage antenna information

Providing valuable information on building amateur and commercial repeaters.

Information about the BDXC and how to join, including a club-compiled list giving time and frequency details for all English language dx and media programmes

Information on how to access the IRC #CQDX chat room for DXers. Also contains a live feed of DX spots directly from DX Summit.

The following frequencies are assigned to datacommunications in the HF bands within the UK By RSGB data communications committee information.

QRP Amateur Radio Club International home page. Your source for QRP information and news.