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Contains stories, pictures, audio files of all previous expeditions and current ones.

This article describes the details of the design, which can be easily scaled for just about any HF band. The antenna described in this article is for the 20 meters band.

This page contains a map of Chinese Prefixes.

Eham users Kenwood TS-50 review

Some Clegg 22'er radio pictures

Running D-Rats on a Raspberry Pi documentation and instruction by n0so

Studio DX, italian DX radio magazine

Info for temporary licence or operating in Greece.

A simple morse code practice oscillator using either PNP or NPN typr transistors

VHF, 50 MHz contest, gallery and six meters infos

eham users review of the Kenwood TS-570D or TS-570G HF Transceivers

Lego MindStorms Iambic Keyer and Paddle Project by N9SSA

This is about Small Antenna types and their properties which can help choosing proper antenna for high-frequency wireless communications as: two-way radio, microwave short links, repeaters, radio beacons or wireless telemetry

This article describes how to build a general purpose DTMF decoder with a low-price chip from MITEL

IC-7600 User Evaluation and Test Report by VA7OJ

IOTA Irish Islands

LinLogBook is an logbook for hamradio and it is based on an sql database. It can be widely configured by the user.

Contesting, CW, antennas and review on TK/OE5XVL DXpedition 1999 plus my GD/OE5OHO DXpedition in 1997.

A club for hams who are also regulars on IRC (Internet Relay Chat).

Web Site of Ukrainian Club Amateur Radio station from Vernadsky Research Station on Galindez island EM1U

Audacity is a free, easy-to-use, multi-track audio editor and recorder for Windows, Mac OS X, GNU/Linux and other operating systems. The interface is translated into many languages.

The free CW Speed Training Software for Windows by JI0VWL

Maker of filters, oscillators, cristals Coils, Toroidal Inductions, Solenoids, Bifilar wound Solenoids, Trifilar Solenoids and Transformers Located in Kansas City, Missouri

IMO was created in response to an ever growing need for international cooperation of meteor amateur work. Radio Observations.

PEP RF output power measurement, and examples RF output power measurements

About Switchable Direction EWE Antenna

Table of power loss to SWR relation

The T-Match with its balanced feed point is one method of feeding a Balanced Dipole.

Adam, VA7OJ/AB4OJ's IC-756Pro III User Review

WorkedFields is a windows free software to displays a map showing the amateur radio field squares contacted and logged in using a third-party logging program.

Personal page

Amateur SSTV from MIR, a 2 meter antenna for bicycles, working the AO-27 satellite portable, and photographs.

Personal web page of Gerardo Pe?a. From Cuenca, in the South Center of Ecuador.

Magnetic Loop antenna for 20 to 80 meters band using home made butterfly condensator kit

A CB to six meter transverter project by ZS2ACP

A group of American amateur radio operators who are living in Germany and come together to participate in amateur radio activities

The Nederlandse Vereniging voor Radio Amateurs (NVRA) operates from Haarlem, Netherlands, under the club callsign PI4HLM and maintains an ATV repeater, PI6HLM. The organization's website provides updates on internal governance, such as the postponement of a General Members Meeting due to necessary amendments to its 1986 statutes. These amendments are required to comply with the Wet Bestuur en Toezicht Rechtspersonen (WBTR) — Dutch legislation concerning the governance and supervision of legal entities. The NVRA's operational focus includes local amateur radio activities, indicated by its Haarlem location and the presence of a **PI6HLM** ATV repeater. The club's adherence to national legal frameworks for non-profit organizations, specifically the **WBTR**, demonstrates its structured approach to club management and long-term viability within the Dutch amateur radio community.

A frame antenna for the 80 meters band, built to be folded and to be easy to be mounted and dismounted. This antenna is suitable for indoor and QRP use, bandwidth is just 10kHz and should be observed a proper distance while transmitting due to high voltage.

An EH Antenna for 14 MHz by EB3EMD based on an original project by F5SWN

There are several reasons that can cause coax line radiation, most of them are related to wrong or missing use of a balun, but none can be imputed to load mismatch.

eHam user reviews of the Yaesu FT-450 HF+6m t ransceiver

WEB Site of UT5UGQ Olga

pythonProp is a collection of Python scripts designed to plot files produced by VOACAP. The package currently contains two scripts, both of which make use of the matplotlib library

Xastir MacOSX APRS software for receiving and plotting APRS(tm) position packets. Xastir supports many map formats and is highly customizable

A combined 144MHz Low-Pass and 432 MHz Notch Filter by VE2ZAZ

Whether Hamradio software, Transceiver or Receiver, WiFi sticks as well as practical accessories. Bonito have everything around the topic Hamradio.

The Null-modem emulator is an open source kernel-mode virtual serial port driver for Windows, available freely under GPL license.Allows you to create an unlimited number of virtual COM port pairs and use any pair to connect one COM port based application to another.

NBTV (Narrow Band Television) is a technique with some similarity to SSTV, and some to conventional FSTV (Fast Scan TV). Like SSTV, it operates in a narrow bandwidth, suited to an HF SSB transceiver, but rather than send individual image frames, NBTV is designed to send multiple frames one after the othe.

A 4 element yagi beam antenna for the 17 meters band with pictures and element dimension and spacing

Demonstrates a specialized **DX cluster** designed to support the annual Jamboree On The Air (JOTA) event, facilitating real-time spotting for participating Scout stations. While its web interface has been discontinued due to security concerns, the cluster remains fully operational and accessible through standard cluster software. Operators can connect to the JOTA cluster by pointing their client to www.pi4raz.nl on port 7300. This setup allows for the exchange of **DX spots** and other operational information relevant to JOTA participants, ensuring that Scouts and their amateur radio mentors can continue to make contacts and log stations during the event.