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Contains digimodes, antenna projects, DX info and lots more

This low power transmitter is developed for ARDF exercising purposes but of course can be used as super QRP transmitter either. With 1 or 2 meter wire as antenna and a ARDF receiver with ferrite-rod antenna the range is about 100m but with better antennas and a 'real' receiver the range is probably much larger.

Wire beam antenna for the bands 6m, 10m, 12m, 15m, 17m and 20m

Working priciple of OSJ and jpole anntennas by PY4ZBZ

Computes the Standing Wave Ratio, given the power readings on a line.

VU3NSH article on high current universal supply for rigs

EB4EQA's Projects GSM1800 moxon square antenna

Supports both PSK31 and PSK63, sends and receives color thumbnail portraits by PSK63, displays 24 PSK63 channels simultaneously, and features semi-automatic mode selection between PSK63 and PSK31. Merely left-click on a PSK63 signal to copy, or right-click on a PSK31 signal to copy.

by Adam M. Farson VA7OJ/AB4OJ

A VHF power amplifier made with two cheap RF transistors, 2N3924 as driver and a BFS22A for final stage, giving an unexpected output power of 7-8 watts maximum

A german documento on magnetic loop antennas

LZ2US offers 3 types amplifiers for the serious VHF/UHF amateur. These amplifiers are very robust and in use by contest groups and EME stations all over the world. Every amplifier is custom made.

OPCLOG provides a straightforward logging solution for amateur radio operators, enabling the systematic recording of contacts. The software primarily focuses on basic QSO management, allowing users to input essential contact details such as callsign, date, time, frequency, and mode. Its core utility lies in its ability to export log data in the _ADIF_ (Amateur Data Interchange Format) standard, which is crucial for interoperability with other ham radio applications and services. This ADIF export functionality facilitates the creation of personalized QSL cards, streamlining the process for operators who prefer custom designs over generic templates. The program's design emphasizes ease of use for individual station logging, rather than complex contest or DXpedition management. It offers a practical tool for maintaining a personal logbook, supporting the fundamental requirements for tracking contacts and preparing for awards. The software's simplicity ensures a low learning curve, making it accessible for operators focused on routine logging tasks.

A MRF141G 3-175MHz Broadband Power Amplifier DL4MEA 02/1998

Versatile transmit interface circuit

New type of a Quad antenna, 6.4dBd gain

QSL card printing tool for windows, can print complete back side of the QSL card and also labels

Club information, photos, utilities, links and repeater list. In Spanish

Detailed review of all the Hell software currently available for the PC

A vertical dipole for the 40 meters band made by using some buddipole parts and adding capacities on both ends by HB9MTN

By Guy, de ON6MU, At VHF, both the 1/4-wavelength monopole and the 5/8-wavelength monopole antennas are widely used.

10 GHz beacons list source internet , spots from DXCluster , hearing from 10GHz band by OK1JKT

A collection of extra Icons for the superb MixW programme.

Information on licensing abroad for radio amatuers by OH2MCN, Veikko Komppa

Home made RF power amplifier for six meter band

High gain, good pattern and acceptable bandwidth. These aims can be realized with a radiation-resistance of 25-35Ohms, because the 28-Ohm-feedpoint is very simple to match.

QSL print service online from poland with lots of printed card samples

Presents the amateur radio activities and interests of Kote, operating as 4L4KW. The page features a collection of external links relevant to the ham radio community, including references to other callsigns such as 4L1BR, 4L1W, 4L4MM, and 4L/ZL1RS, indicating potential connections or shared interests within the Georgian amateur radio scene. It also lists several well-known ham radio resources like QRZ.com, DXzone.com, and Contesting.com, suggesting an active engagement with DXing and contesting. The resource includes links to major amateur radio equipment manufacturers such as Icom, Yaesu, and Kenwood, which implies an interest in modern transceivers and station setup. The mention of DX-Summit and "fixed activity on Ham bands" further reinforces a focus on making contacts and participating in on-air operations. The page serves as a digital hub for 4L4KW's ham radio presence.

An Hentenna plan for six meters band

Construction Details for 50MHz-Yagis in DK7ZB-Design

Antenna tests on Alford 1.2 Ghz for ATV oprations in italian

Qsl Information databse updated the 1st of the month. Over 130,000 managers and direct addresses

The Grit Net website

glfer is a program for reception and transmission of QRSS/DFCW signals. It is composed of two main parts: the spectrogram window, where you can see the spectrum of the received signal vs. time the transmission functions, to emit cw characters at a slow but precisely controlled speed, using the QRSS (slow CW) or DFCW (Dual Frequency CW) modes

Some beginners guide to monitoring aircraft communications

Yaesu FT-100 radio control software for linux

A 4 element delta quad antenna for 15 meters in french

A simple & effective antenna pre-amp for 10m. Band (28-29.7 MHz)

Schematic of a regulated 0-24v 2A Power Supply

An Eprom Eraser with UV-Ray for 27Cxx Eprom (and similar, common in TNC) with a timer

Serving Tarrant, Parker, Wise counties, and city of Fort Worth, Azle, Springtown, Boyd, Weatherford, Saginaw

Huge amount of relevant information you should know before building a tower

A long wire balun by ON6MU

Based on original G2BCX design this J-Pole antenna for the six meter band is made with a homemade ribbon cable. The antenna shown in this article includes a coaxial cable choke feed to remove RF currents from flowing on the outer of the cable.

A new weak signal DX mode for Radio Amateurs, employing M-ary FSK, phase continous tones and convolutional coded FEC.

Thierry LOMBRY, ON4SKY, develops in several technical articles the way to select a transceiver. His website includes also some in-depth reviews

Official Icom comparison chart for IC 756 PRO III, IC-7600, IC-7700 and IC-7800

A simple TRAP-dipole project for 20 and 40m bands includes EZNec simulations

This program has been designed for packet communication with ISS (International Space Station), PCSat or 'compatible' satellites with ease... Ideal for any UI packet communication.

A triband VHF Yagi antenna for 6 m, 4 m and 2 m with one feed-point by DK7ZB