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Multiband no trap no gap antenna. This Antenna is a small wonder, easy to build and allow you to work all HF spectrum with your TRX and it's internal ATU.

Homebrew a 1/4 wave 80 meter vertical using aluminium tubing

CW decoder project that automatically adapts itself to the CW rate and may be employed for learning purpose substituting the traditional tone generator and offering the capability of displaying the keyed code.

How to build a beacon keyer for 28 MHz using an old CB Radio transceiver, by Tom Sevart

A NorCal Project A Crappie, not crappy, portable antenna

A 10 Bands mobile antenna for about the price of 2 mobile monobanders.

SDR# (read SDR Sharp) is a high performance Software Defined Radio application. SDR sharp is a fully featured SDR capable of handling samplerates from kHz level soundcards up to multi hundred MHz dedicated samplers, thanks to its multi-core architecture.

The AMRAD Active LF Antenna. You can tune into LF activity with this easy-tobuild and erect active antenna. As a bonus, you get MF and HF coverage, to not to mention world-class performance

Unsing FT-950 in contests by K9ZW

The UK Scanning Directory - HF, VHF and UHF UK Scanner Frequencies Database Updated Daily by a dedicated group of Radio Amateurs and SWL Listeners

Add Solar-Terrestrial data to your website, by adding a simple html code to your pages by Paul L Herrman

Most morse code (CW) training requires you to learn everything at once without a training process. This application changes that and separates training into phases.

by Don Graham, VK6HK

Details and very early history of yaesu musen amateur radio equipment in australia . 1966 yaesu first trasceiver.

A must read guide for all new and old operators. This document was originally written with the prime focus on DXing and pileup behavior. Suggestions by proofreaders have been implemented; the document is not as narrowly focused anymore as originally intended. It contains hints, tips and tricks for newcomers as well as old-timers. Additionally there are VHF/UHF operational matters, DX Cluster ethics, COPS, Conflict Situations and more.

A quick vertical for 160 meters portable use

Remote HF - VHF - UHF radio station using TS-2000 and remoterig devices

This note describes a relatively small, but efficient, loop antenna initially created for portable operation. With suitable modifications, it can be adapted for fixed station use. In this age of CC&Rs, an antenna similar to this may very well be the answer to your problems. Have a look, be inspired, get out the torch / soldering iron and create your own version!

Signalprocessing for SSB - Direct Conversion Receiver using Phasemethod for Sideband Supression, does all necessary signalprocessing for Direct conversion Receivers using IQ-mixer for demodulation.

This calculator computes the matched line loss for a transmission line using a model calibrated from data for the transmission line types built in to the calculator. It also gives an estimate of the mismatched loss if the mismatch is specified.

The St. Louis Vertical Revisited by Dave Gauding, NF0R here are a few ideas and observations on the St. Louis Vertical

Simple, inexpensive and lots of fun! Here is an easy to make home brew antenna that can get you on the air working satellites or be built for use as a portable hand held antenna to extend the range of your HT.

Presents the detailed construction of the _FLA25HV_ antenna, a specialized array optimized for Earth-Moon-Earth (EME) communications on the 2-meter band. This resource provides schematics and practical insights into building a high-gain antenna system capable of reflecting signals off the lunar surface, a challenging but rewarding aspect of amateur radio. It covers the mechanical and electrical considerations essential for achieving the precise pointing and signal strength required for successful moonbounce contacts, often yielding **20 dB** or more gain. Amateur radio operators pursuing EME operations require robust antenna systems and precise tracking capabilities. The FLA25HV design addresses these needs by focusing on element spacing, impedance matching, and structural integrity to withstand environmental factors while maintaining critical alignment for lunar reflections. Such systems are crucial for making contacts over distances exceeding **768,000 km**. This personal page serves as a practical guide for hams interested in constructing their own EME arrays, offering a glimpse into the technical dedication involved in pushing the boundaries of VHF/UHF propagation.

Collection of TS-50 mods, LCD display dark, TS50<-->AT50 communication, TS-50 Power Mod for QRP, TX Coverage mod TS-50, CAT control for TS-50S

by Dr. D.T. Emerson, National Radio Astronomy Observatory (NRAO++). Antenna Compendium Volume 4, pp 64-68, 1995, published by the ARRL.

The Grid Yagi (or Grid Quad) is a high performance yagi antenna that can be built with readily obtainable inexpensive materials. Described here is a 6 element 2 meter version with a boom length of about 1 wavelength, shown

A compact directional receiving antenna

Java free space pathloss calculation and EME

Includes beverage and rhombic antennas

The design of Ruthroff broadband voltage transformers

Satellite tracking for a Java-enabled mobile phone, Blackberry device, PDA.

Feeding a G5RV Overview by VK1OD

2 element reversible verticals, small footprint, big results.

Memory management program for the FT-60R/E FM handheld.

VHF/UHF DX site showing latest propagation, software, radio dealers, awards, maps etc.

The U.S. Amateur Radio Callsign Lookup service, hosted by the University of Arkansas at Little Rock (UALR), offers a direct interface for querying the FCC's amateur radio license database. This resource is specifically designed for rapid retrieval of licensee information, including callsign, name, address, license class, and expiration date, all critical data points for QSLing and contact verification. The underlying database is refreshed daily, ensuring that the presented information reflects the most current FCC licensing records available. This service distinguishes itself by its direct reliance on official FCC data, processed and maintained by a university institution, which lends a degree of authoritative accuracy to its lookups. Users can input a specific callsign to instantly access detailed license particulars, facilitating efficient station identification and record-keeping for DXers and contesters alike. The daily update cycle minimizes discrepancies often found in less frequently synchronized callbook services. The UALR callsign lookup functions as a straightforward, no-frills utility, prioritizing data integrity and accessibility for the amateur radio community. Its operational simplicity and consistent data refresh schedule make it a reliable reference for verifying U.S. amateur radio licenses.

A 3.5 Mhz top loaded vertical antenna built using 2 elevated radials by DJ9RB

RigPix front and back side pictures of the Yaesu FT-450

Shortwave dxing newsletter, Cumbre DX is dedicated to reporting what's hot in regional and international shortwave broadcast listening

Listen to HS0ZER/DL1ZAV radio station from Bangkok, Thailand

Radio City features a wide selection of amateur radio equipment from Kenwood, Icom, Yaesu, MFJ and a host of other manufacturers. Visit the store in Mounds View or shop here, online.

Largest general-purpose ham radio club in Twin Cities. Three repeaters, fully equipped two position HF club station, contesting, field day, and more.

A page about a Magnetic loop antenna project for the 40 meters band, includes nice pictures and history of construction

Moxons work great, and they take up less space than full size two element Yagis

This attenuator is worth your attention. Built like the proverbial brick outhouse, it's one you can easily duplicate by N9SFX Pdf file

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

Pictures of a 2 element cubex Quad antenna at a height of 10 meter

RemAud is a Voice over IP (VoIP) application primarily designed for two-way amateur radio remote control over the Internet. RemAud uses streaming-audio technology in a client-server architecture. It features high radio sound quality, low latency, low bandwidth and very low CPU usage by DF3CB

Images and Radio Shack composition

DAVIS RF Co. has been in the business of supplying the staples of wire antennas for over 30 years. DAVIS RF Co. supply all coax cables, all connectors, ladder line, rotar control cable, insulators, and we have the largest selection of wire for wire antennas. DAVIS RF Co. is the designer and trade mark holder, and primary source for Bury-Flex Tm low loss coax cable. PolyStealth Tm high strength PE insulated antenna wire, and Flex-Weave Tm wire