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A complete restoration of a Heathkit SB-200 HF power amplifier

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

Otsego County amateur radio association

Eham users Kenwood TS-50 review

Forget Frustration: Gain Valuable Morse Skills And Increase Your Amateur-Radio Pleasure by N1IRZ

SFHRC - San Francisco Ham Radio Club, formed December 1,1998, to conduct activities to advance the general interest and welfare of Ham Radio in San Francisco and neighboring communities of the Bay Area.

Some Clegg 22'er radio pictures

A collection of calculators, contest schedules, references, databases and more for Palm OS by KB7AVT

Studio DX, italian DX radio magazine

Info for temporary licence or operating in Greece.

This page contains a map of Chinese Prefixes.

an homemade ultra lightweight Morse code keyer paddle that can be used as a manual straight key

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

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

Lego MindStorms Iambic Keyer and Paddle Project by N9SSA

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

VHF, 50 MHz contest, gallery and six meters infos

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

IOTA Irish Islands

About Switchable Direction EWE Antenna

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

A noncommercial site operated by Max Robinson and dedicated to passing on and preserving knowledge of vacuum tube circuits and techniques.

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

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

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

IC-7600 User Evaluation and Test Report by VA7OJ

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

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

Personal page

A CB to six meter transverter project by ZS2ACP

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

Antenna modeling discussions about What happens if... a dipole is bent horizontally, laterally, vertically. Zig-zag, meander, catenary curve. Effect of sag, elevation, radials. OCF off-center feed, harmonics. Includes 4NEC2 antenna models for each study.

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

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

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

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.

The free CW Speed Training Software for Windows by JI0VWL

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.

WEB Site of UT5UGQ Olga

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

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.

Table of power loss to SWR relation

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.

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.

Online websdr receiver based in Rome Italy provides a nice user web interface and receiver most of the amateur radio HF bands

This Magnetic Longwire Balun (MLB) makes it possible to efficiently use a coaxial lead-in cable with all forms of longwires, T-forms or other types of wire antennas, without the need for an antenna tuner.

Antennas and operating note on 160 meters

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

Around 200 electronic circuits in pdf format or images, There are also over 1000 links to useful electronics, freeware, open source websites. There are some 100 useful documents, software and pcbs too. Mainly industrial electronics, instrumentation. Covers Various aspects of electronics and basics of circuit design.