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Basic priciples of Yagi antennas and its variations like Quagi antennas, Quad antennas includes pictures, drawings and online calculators by KN9B

HA8DU European manufacturer of quality amateur radio antenna tuners for HF Bands, from 10 meter to 160 meters band. Products includes manual and automatic antenna tuners, power handling till 3.5 KW. HA8DU produce even custom made variable capacitors and rotary switches.

QRP CW transceiver Kit for 20 or 40 meter band, by OKA Hills Research, assembly history and description

A portable (15.5 foot diameter) NVIS loop for 3.5 to 7.3 MHz. Performs well at high and low takeoff angles, and has smaller footprint than most NVIS antennas.

The Site contains our story, moments of our activity, notices about radio for any users etc... in italian

Features an immense gallery of color photos, facts, newsletters, articles and links for those interested in collecting or restoring antique radios

A very well done presentation about End-Fed Half-Wave antennas. This PDF document contains a summary of experiences in how to build custom EFHW antennas. Includes an interesting comparison table of UnUn configurations with recommended toroids, Wire size, turns and capacitors. An useful recap on common errors in building homebrew EFHW Ununs completes the document.

The Triangle ATV Association is an organization of hams in the Raleigh-Durham-Chapel Hill NC area who communicate by means of our own personal TV transmitters and receivers.

Operating QRP at the lowest possible power during contest article by PA1B

Shrine Temple Amateur Radio Club

A PDF Presetation from the W0DXCC Forum on how to improve the performances of the popular Yaesu FT-2000 transceiver

The YASME Foundation is a not-for-profit corporation organized to conduct scientific and educational projects related to Amateur Radio, including DXing and the introduction and promotion of Amateur Radio in underdeveloped countries.

This amplifier uses two 60w Spectrian amplifier boards with the usual input and output hybrid coupler and combiner.

Antenna manufacturing & design, antennas for limited spaces, Home of the rugged 160 Meter sloper antenna

Chernihiv ham radio site

E4X - Palestine 2010 DXpedition web site May 28th to June 6th.

Steele County is about 60 miles south of Minneapolis, MN.

G8EPR pye telecoms museum incorporating.. emeregency services & radiotelephone museum of great britain

SDR Project for a compact amateur radio software defined radio trasceiver covering HF bands all mode. Website includes schematics, element PCB, pictures, movies, firmware and elements bom.

Show CQ and ITU Zone in an interactive clickable map based on google maps. Additional locator tool tip can be displayed by clicking on points, and a search function it is also available to locate addresses, and locators.

A 12v portable oscilloscope project

The short history of the SSN Smoothed Sunspot Number at Luxorion

Schematic diagram for a high voltage power supply by W4NFR

Building an amateur station for competitive radiosport involves a number of critical steps, regardless of the band or bands you focus on. These include, but are certainly not limited to: Station layout, Equipment interconnection and switching, Inter-station interference, Antenna selection. Radio interface with the logging program, CW and voice keyer integration, Rotator control

Circuit designs for IC audio amplifiers by N1HFX

The purpose of this page is to provide information regarding Morse code (otherwise known as Continuous Wave or CW) to hams and non-hams alike.

Windows free sound recorder. What you save is what you hear ! Small utility program to capture and save any sound played by your computer. Audio recorded can be converted in MP3 format.

Sam Houston amateur radio klub club cleveland texas 146.900 shark club n5ak

Poole Radio Society G4PRS, located in Poole, Dorset.

Frequently Asked Questions - about vintage tube-type ham radio and communications equipment

An interesting rf coaxial switch project capable of handling 800-1500 W. This is a cheap home made RF coaxial switch in use by PA0FRI

Reviews of the Yaesu FL-2100 series power amplifier at eham

Acom 1010 operating manual in english PDF File

AFR Enterprises a leading distributor of electronic components, semicondustors, diodes, Resistors, Integrated Circuits across the USA.

A blog site dedicated to SSTV Slow Scan Television images transmitted from the International Space Station

Radioing Collins Radio collection

Elecraft K3 pictures, inside pictures, assembly and case.

A travel, or a fixed vertical coax antenna originally designed by PA0FBK. This antenna is very easy to make from a piece of 50 ohm or 75 ohm coaxial cable, and can be either smooth, roll-up version, or rigid cable

Upload an ADIF fiel and plot all worked grids in an online map. Support filtering by band, year and can export the output directly into a google map, or a google earth KML file

Licensed since February 1991, IK1QBT Tony Gallo shares insights into his extensive amateur radio journey, highlighting his involvement in **DXpeditioning** and contesting. His page lists several callsigns he has operated under, including 3A/IK1QBT, TK/IK1QBT, IA5/IK1QBT, and as an operator for 4U9ITU and 4U0ITU, showcasing a broad range of international activity. Tony's background as an ex-Radio Officer in the Merchant Navy and a Radio Operator for the Italian Maritime Coast Radio Station "ICB/GenoaRadio" provides a unique perspective on radio communications. He is an active member of ARI, INORC, and HSC, and serves as secretary for the Marconi Club ARI LOANO, underscoring his deep engagement within the amateur radio community. His participation in multi-multi operator contest teams like IH9P in the CQWW-CW 2006 and the HQ Italian ARI Contest Team in the IARU HF (2004-05-06) demonstrates a strong commitment to competitive operating, primarily on **CW** and HF bands.

EME traffic and 144 MHz up operations

Pictures and information about polish awards

Are you organinzing a dx pedition? Some countries may require a visa before arrival. Find visa requirements here

Harbour Rock is primarily a top quality vacation home. But for the ham, DX’ing or contesting is irresistible at a QTH where you can start your own pileup.

Yahoo group dedicated to popular HF amplifier Alpha 9500

This versatile broadband amplifier is used in several DX Lab projects.

Building equipment for AMSAT P4A geostationary Es'hail-2 Quatar OSCAR 100 Satellite

FCARC exemplifies the principles of amateur radio: public service, particularly in emergency communications support; growth in our technical skills, and enhancing the application of those skills

A guide to properly use FT8 ALC and power when transmitting in FT8 Mode. Incorrect usage of power and audio from your computer may cause unreadable signals and transmit harmonics that can didturb other signals.