Search results

Mediumwave, shortwave, and amateur bands QSL cards collection

Providing quality full color QSL cards for Ham Radio operators.

An affiliate of the Philippine Amateur Radio Association, Inc.

This online article provides a list of individuals who hold or have held amateur radio callsigns, detailing their public recognition. The resource identifies specific callsigns such as **K1JT** (Joe Taylor, Nobel Prize in Physics), **W6OBB** (Art Bell, syndicated radio personality), and **JY1** (King Hussein of Jordan), linking them to their non-amateur achievements. It also notes operational statuses like _Silent Key_ for deceased operators and _lapsed callsign_ for inactive licenses. The article includes information on callsign changes due to vanity callsign programs and provides examples of individuals involved in specific technical areas, such as Percy L. Spencer (**W1GBE**), inventor of the microwave oven, and Jay Kolinsky (**NE2Q**), inventor of electronic sirens. It also references amateur radio involvement in _space missions_ for individuals like Owen Garriot (**W5LFL**) and Helen Sharman (**GB1MIR**). DXZone Focus: Online Article | Famous Hams | Callsign Status | Vanity Callsigns

Presents the DBO274 Citizen Band mailbox, a digital communication hub accessible via HTTP and Telnet, specifically catering to **CB radio** enthusiasts in Germany. This resource outlines its functionality for Packet and other digital emissions on the 11-meter band, a segment often overlooked by traditional amateur radio operators but vital for CB users seeking advanced communication methods. The author, DH8YMB, provides insights into its operation, reflecting practical experience with digital modes in the CB spectrum. The DBO274 serves as a bridge, enabling users to exchange messages and data packets, extending the reach and utility of standard CB transceivers. It represents a localized digital infrastructure, demonstrating how the 27 MHz band can support more than just voice contacts, incorporating elements of early internet-like communication within the CB community. This setup highlights the enduring innovation within the CB realm, adapting technologies like Packet Radio for a different user base. It underscores the versatility of radio communication, even on less conventional bands, for those interested in digital data exchange beyond the typical amateur allocations.

The Construction Principles for Duoband-Yagis 2m/70cm by DK7ZB

Ham radio resources about qrp, dx, logging, contesting, includes lots of links to FT817 resources on the web

qrq is an open source Morse telegraphy trainer which runs on several operating systems (Linux, Unix, OS X and Windows), similar to the classic DOS version of Rufz by DL4MM.

Few recordings of difficult qso's

The Moxon Beam, introduced by L. Moxon (G6XN), is a compact 2-element Yagi featuring a radiator and reflector with reduced dimensions, approximately 75% the size of a full-size beam. This design utilizes bent element ends for capacitive loading, which is superior to inductive loading with coils, resulting in greater bandwidth and lower losses. DK7ZB details that while the gain is slightly lower (0.5-0.7 dB) than a full-size beam, the _Moxon_ offers an exceptional front-to-back (F/B) ratio of 30 dB or more on its design frequency, surpassing other 2-element beams. The article provides specific dimensions for building wire _Moxon_ antennas for bands from 30m down to 10m, and also mentions a 2-m-Moxon. Construction guidance includes using fishing rods for lightweight spreaders and an aluminum tubing spider for support. The resource highlights the utility of _Moxgen_ by AC6LA, a freeware program that simplifies Moxon beam design and generates EZNEC output files for further analysis and tapering modifications. DK7ZB emphasizes that the design frequency should be set at approximately one-third from the band's beginning to optimize SWR performance, as SWR tends to rise more significantly below the design frequency. The bandwidth for SWR < 1.5 is noted as sufficient for ranges like 28.0-28.7 MHz and 21.0-21.45 MHz when constructed with aluminum tubes, though wire beams exhibit a narrower bandwidth.

A homebrew dummy load is usually a combination of several parallel carbon resistors, in order to be able a final resistance of 50 Ohms.

This article describes a simple device to generate Roger Beep tones.

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.

Small, but growing, group of amateur radio enthusiasts, most of whom are within 90 miles of Atlanta, are interested in promoting the development of the branch of amateur radio known as QRP - building and operating low power transmitters, receivers and transceivers.

WorkedGrids is a Windows application that displays a map showing the amateur radio grid squares contacted and logged in using a third-party logging program. WorkedGrids uses colors to display information on a per-band basis. Up to four bands can be displayed concurrently by VE2ZAZ Bert

Over 1.5 million US amateur radio call signs are managed by the FCC, and this online service assists operators in finding available vanity call signs. Users can specify desired **call sign suffixes** to narrow down search results, which are drawn directly from the current FCC database. The platform clarifies that some valid call signs, never previously held since online FCC record-keeping began, may not appear in search results; for such cases, a separate "call lookup" function is recommended to verify availability before applying. The service provides crucial guidance on the application process, noting that applications should generally not be filed before the indicated "Available Date" unless the applicant is a former holder or a close family member. It also dispels the common misconception that call signs are granted on a first-come, first-served basis on any given day. Instead, all applications received on a particular day are metaphorically "thrown into a hat," with a winner randomly selected. This mechanism ensures fairness in the assignment of highly sought-after **vanity call signs** across the US amateur radio community.

Broadband HF Vertical antenna which does not require a tuner, and which is capable of providing reasonable performance on all bands from 7MHz to 28MHz

DX Buddy is a multi purpose ham radio application that let you control your radios, or controller, offer a logbook, cluster access, qrz lookups, and interface with several popular ham radio applications

Article published on Practical Wireless about the W3DZZ multiband trapped dipole antenna made available by GM0ONX

Ham homebrew, software, and ham info

A 9 band stealthy Fly-By-Night Antenna Eham article by N4UM

A combination of Fldigi and Flmsg for portable devices running Android used for NBEMS

Modification of the MHW 612 by Motorola for the two meter band by sv1bsx

Collection of different techniques to homebrew PVC yagi antennas, including elements assembling, baluns and chokes, radiator box tips and tricks by dk7zb

The two linear amplifiers are ment for use with QRP SSB/CW/FM/AM transmitters on the amateur bands 15 and 17 meters can be powered from a 12 volt DC supply by ON6MU

5/8 vertical groundplane antenna for six meters band

xdx is a dedicated Linux network client for amateur radio operators who want to exchange DX (long distance) radio information

The DK7ZB-Quadruple-Quadlong for the 2 meter Band

The circuit described below will substantially reduce or completely eliminate interference from almost any local source whilst leaving the wanted signal relatively unaffected, even though it may be on the same frequencey by TREVOR, G3ZYY

Unix or linux programme atlc calculates the impedance of electrical transmission lines of totally arbitrary cross section.

6k5ryf Homepage...

Ed Kelly VP9GE Bermuda Vacation

Are you having RF problems in the shack since you put up your HF vertical antenna? This is a common problem with an easy solution.

How to easy connect two Pc together with a laplink cable

The long range bandplan for 70 MHz by OZ2M

Conversion, programming, and software notes for the AWA RT85A UHF transceiver for 70cm

Beltronics is a factory authorized Kenwood, Icom & Yaesu (Vertex/Standard) Repair Center, Hollis, NH

URLog, version 0.1.10, functions as a freeware amateur radio logging application designed for basic QSO record-keeping. The software provides core functionalities for inputting contact details, including callsign, date, time, frequency, and mode, which are fundamental for maintaining an amateur radio logbook. Its design emphasizes ease of use, making it accessible for operators who require straightforward logging capabilities without extensive advanced features. The application's utility lies in its simplicity for everyday logging tasks, particularly for those who prefer a local software solution over web-based loggers. While specific data formats supported are not detailed, standard logging practices suggest ADIF compatibility for export, facilitating integration with other ham radio software or online logbooks. The software's compact download size of approximately 4.5 MB indicates a lean installation, minimizing system resource usage.

ebook2cw is a command line program (optional GUI available) which converts a plain text ebook to morse code MP3 files. It works on several platforms, including Windows and Linux.

The 9A3MR contest QTH rental provides a fully equipped amateur radio station for DXpeditions or radio holidays on Murter Island, Croatia. The station features a Drake TR7 transceiver and a 16-meter tower with a rotator, suitable for various HF operations. Accommodations include a four-room apartment and a studio apartment, both within 200 meters of the beach, offering amenities like parking and a barbeque area. This QTH is located in Jezera, a fishing village with local stores and restaurants within a five-minute walk. While Murter Island itself does not qualify for IOTA due to a bridge connection, the Kornati Islands National Park (IOTA EU-170) is only 10 nautical miles away, with daily tourist tours available. The Krka National Park is also accessible by car, approximately 25 km distant, providing additional recreational opportunities.

Shortened vertical antenna for 40 meters band an homebrew project

D-PRS is GPS for ham radio. Includes DStarTNC2, javAPRSSrvr, DStarInterface, and TNC-X. D-PRS is the act of converting Icom GPS information generated by Icom D-STAR radios in GPS mode into TNC2 fomatted APRS strings.

Eham members product reviews of Icom IC-746

This Spectrum Analyzer supposes to be a cheap and a useful device for any ham radio by Iulian Rosu, YO3DAC / VA3IUL

Problems using the tuner interface in the ICOM IC7000

PTT and soundcard interface schematic by ON6MU

Distance and directions calculation program using both Spheric, the perfect round earth model, and Vincenty's inverse ellipsoid algorithm, the WGS 84 earth model.

Optimising a typical G5RV antenna by VK1OD

A well documented article about construction and analysis of a horizontally polarized halo antenna for 6 meters band by Dr. Carol F. Milazzo, KP4MD

If you have space constraint at your QTH for a HF antenna, you can try contructing this HF magnetic loop antenna for 40-20 meters bands