Search results

Suppliers of Amateur Radio equipment, Antennas, accesories MFJ, Ameritron, Mirage, hardware and software for digital modes.

Picture and construction details of a 5 element 20 meter monobander

Broadband dipole antenna, needs an antenna tuner but can reach 3db gain over dipole

AutoRec is windows freeware time based automatic recorder - player for radio broadcast. Auto Recorder will record or play wav audio files, and execute batch or other executable application programs at scheduled times. The primary use for Auto Recorder is automatic, unattended recording and playback of network or other satellite-delivered radio station program material.

An AO-10 antenna by K5OE, this design is optimized for 436.8 mHz with a 50 Ohm feed

The QM7 antenna is a simple 7 elements Yagi with 3.70 m boom length for the lower 144 MHz SSB/MGM band, used it mainly for Sporadic-E and MS contacts. It exhibits a forward gain of 11.35 dBd; i.e. 13.5 dB forward gain over the isotropic radiator, while the F/R is about 12.5 dB

Open source Arduino based CW (Morse Code) keyer with a lot of features and flexibility, often rivaling commercial keyers.

OE4RLC, OE3DUS in Allhau Austria with wire antenna and full HF amateur radio bands coverage

A site for collectors, users, restorers of the historic World War Two radio, The Wireless Set No. 19, built in the UK and Canada, and used by many Allied armies.

Ham Radio Antenna Tuners--Full Legal Power--Patented Circuit--Outstanding Efficiency and Power Capability

HamRadioHomebrew Cat Interface for Yaesu FT-897 by PE1OPM

Photographs and QSL of Louis Varney father of G5RV antenna

WinLink 2000 employs Stations World-wide to provide an HF/VHF/UHF digital radio Interface into the Internet Email system for the mobile radio operator. Features include binary and graphic file attachments, APRS position reporting and over 340 downloadable WX products. The mode used is Pactor I and Pactor II.

A homebrew project for a 2 meter 4 element yagi beam antenna by 2E0HTS

US ham radio band plan in pdf available for download and print

The Clemens match is easy to make and reliable, and is preferable to a single Gamma match as it is balanced

DXing listeining mediumwave AM Broadcast Band stations or shortwave radio stations worldwide.

SSTV info for beginners also has links for other data modes psk31 etc and links of interest to radio amateurs

The W3DZZ trap dipole is a versatile and economical antenna option for amateur radio operators looking to work multiple bands without the need for extensive equipment. This antenna design utilizes traps to allow operation on various HF bands, making it suitable for both casual operators and serious DXers. Its construction is straightforward, making it accessible for beginners while still providing excellent performance for seasoned hams. Constructed with readily available materials, the W3DZZ trap dipole can be built to fit specific band requirements, allowing operators to optimize their setup for the frequencies they intend to use. The design is particularly favored for its ability to maintain a low profile while delivering effective radiation patterns. Whether you're contesting or chasing DX, this antenna can enhance your station's capabilities without breaking the bank.

UX5UO print, world of qsls easy and inexpensive printing of radio amateur qsl cards in russian and english provide agents in several countries.

Yahoo! group FT897. This group is dedicated to the discussion, operation, and application of the Yaesu FT-897 FT-897D amateur radios.

A stacked Jpole antenna plan by Gary - KGØZP

A Google query for radio clip art

Why Packet Radio? Could be, You are Missing Something Funm, by Greg Jones, WD5IVD

Theory and operantions, G5RV construction tips by Keith, KE2DI

Radio Scanners Uniden Bearcat, Antennas, CB_Radios, Ni-Cad Batteries, Frequency Books, Accessories, Power Supplies and Cords, FM Two Way Radios, and other Related Merchandise

Ham Radio applications with the Arduino micro-controller presentation

Technical reference about Accessories, Amplifiers, Antennas, Cable and Connectors, Filters, Geography, Grounding, Gunk, Matching Networks, Projects, Propagation Info Radios, RFI/EMI, Rotors, Station Setup, Towers.

English language International Shortwave broadcasts listed by search time.

Amateur Radio Call Log is a basic ham radio logging app for Android 1.5 and above. It stores Date, Time, Station, Freq, Mode, RST, and additional comments. Also has the ability to easily look-up callsign information from the FCC database.

The ITU and CQ Zones Map is a printable two-page PDF provided by Icom, displaying the world divided into ITU and CQ Zones. The purpose is to assist radio amateurs in identifying and understanding these zones for communication purposes.

Tarheel Antennas presents its product line of motorized **screwdriver antennas** and stainless steel mounting solutions, engineered for both amateur radio operators and commercial users. The resource details the manufacturing process, emphasizing in-house CNC machining and the use of quality materials for durability and performance. It highlights the company's commitment to U.S.-based manufacturing, with products built in St. Joseph, MO, since 2008. The site provides essential contact information for sales and technical support, including email addresses and phone numbers. It also includes a mailing address for physical correspondence. While noting a temporary absence from the Dayton Hamvention in 2024, the company expresses intent to return in 2026, indicating engagement with the amateur radio community.

Kv5r Understanding NVIS Antennas and Propagation. This article is not intended to be a complete primer on HF radio propagation or emergency communications.

Radio propagation prediction and simulation tool for VHF-UHF, based on the Irregular Terrain Model, also known as Longley-Rice. Can be used as a repeater site planing tool and radio coverage analysis. Currently it works on Linux and Windows.

All about radio direction finding (RDF)

You will find on these pages my experiences and results on antennas and local/non-local QRM/noise reduction. Using a broadband vertical active magnetic loop and a home made / designed broadband amplifier. Two vertical magnetic Alford loops are used in an array. Analog and Digital Signal Processing and a dual phase coherent Software Defined Radio (SDR) are used. By PA0SIM

HF Digital Voice for Radio Amateurs. FreeDV is a free application for Windows, Linux and MacOS that allows any SSB radio to be used for low bit rate digital voice.

Listen to the DSTAR Repeater from Florida USA currently connected to Reflector 1c

WinPSKse is a logical outgrowth of WinPSK as designed and written by AE4JY. The look and feel is intentionally similar, but some significant changes have been made, not the least of which is the ability toreceive two PSK31 signals simultaneously.

Monitoring Times, SWL, BCL, montly reports, Broadcast band, satellite television, long-wave coverage, Reviews of new products and radio-related software.

A large collection of amateur radio maps, including CQ and ITU Zones, a complete set of ham radio Prefix Maps, grid locators and time zones map. An excellent ham radio mapping service.

Signals Analyzer it's a a program, which is designed for the very qualitative analysis of different signals. The one of main fields of SA application is the analysis of unknown or unclear, strange signals. This programm will be very usefull to everyone from professional analysts to amateurs.

These omnidirectional antennas offer Horizontal polarization, and about 2.1 dbd of gain. They are much quieter than a dipole or a vertical, have a broader bandwidth and will usually out perform a dipole antenna.

Morse Tutor Gold by GGTE Quality Software for Amateur Radio.

If you have ever tried transmitting on HF from a tall block of apartments, where it's just not possible to erect a substantial aerial system, then this article is for you

Collectible,antique, Radio Tubes, special purpose and audio electron tubes and literature.

Unified Microsystems presents a range of amateur radio products, notably the **XT-4 MK2 CW Memory Keyer**, a battery-powered iambic keyer designed for portable operations like Field Day, POTA, SOTA, and DXpeditions. It features four non-volatile memories, each storing approximately 240 Morse characters, and operates at speeds from 8-45 WPM. The XT-4 MK2 also includes an auto power save function and paddle reverse, making it adaptable for multi-operator setups. Beyond the XT-4 MK2, the site details the **W9XT Contest Card**, a PC plug-in board offering DVK and CW interface capabilities, allowing operators to record and playback CQs and contest exchanges. Other offerings include the BevFlex-4X RX Antenna System, RAS-4 RX Antenna Switch, VK-64 Voice CW Keyer, and various USB interfaces. Additional products cover electronic development, such as the ATS-1 Terminal Shield for Arduino™ and VR-X Power Supply Voltage Regulators, demonstrating a broader scope beyond just operating accessories. The XT-4Beacon MK2 / CW IDer is also highlighted for beacon projects, capable of storing messages up to 5 minutes at 25 WPM.

A 3 element yagi beam for 40 meters band

A Quad Fractal Antenna for 20 meters band by F3DD

Presents Telstar Electronics as a manufacturer specializing in amateur radio accessories, detailing its history since 1995 and highlighting key product offerings. The resource specifically mentions the _VoiceMax Transceiver Speech Processor_, designed to enhance audio fidelity and punch for SSB transmissions, and the _SkyWaveDX350_, indicating a focus on signal processing and reception improvement for DX operations. The company's product categories span ham radio accessories, microphones, and RF amplifiers, catering to various aspects of a station setup. The site implies a direct-to-consumer model for these specialized components, providing technical solutions for Icom, Yaesu, and Kenwood transceivers, and supporting homebrew enthusiasts with components and technical references.