Search results

This is an short description on how to make a cheap omni antenna for 802.11 wireless LAN cards.

Build your own multiband W3DZZ antenna resonating on 80 40 20 15 and 10 meters band

Total Boom Lenght is 3 m.

Installing your dipole end insulators, a beginner guide to proper setup wires to insultaors.

Calculate eh antenna components dimension with this online form

J-pole Design Program V1.1 by WA2ISE Download a VHF twinlead Jpole antenna calculator MSDOS program

Scanner and radio mods taken from qrz ham radio cd rom

A well documented plan to build a magnetic loop antenna for Shortwave Listening, includes photos and diagrams.

Freeware windows Wave Generator use the sound card's output as sine wave output. A built in sweep algorithm is used by audio hackers to measure frequency repsonses of their amplifiers

MININEC for Windows 14 is antenna modeling tool for the novice, student and hobbyist. Download the mininec setup files.

A G5RV plan for 10-160 meters, 10-40 and 10-80 meters band

This page details the construction of an easy-to-make collinear 360 degrees omni-directional, vertically polarised, antenna for 802.11b/g wireless networking.

How High should my Dipole be? Dipole Antennas and the effect of height above ground. The effectiveness of a dipole antenna is influenced by its height above ground, determined by the intended use such as DX work, local communication, directionality, omni-directionality, and feed point impedance. Through EZNEC modeling, the study evaluates a 40-meter dipole's performance at various heights, from 7 to 560 feet. Findings reveal that lower heights enhance omni-directional local communication, while higher placements favor DX work with low-angle radiation. The study emphasizes the importance of defining operational goals to optimize dipole height and performance.

FFTDSP is a PC program which can detect weak radio signals in real time. Uses the PC's soundcard and advanced signal processing techniques, extracts and displays weak signals from the receiver audio.

90 foot tall top loaded vertical for 160 meters

Live streaming audio of VHF marine radio channels 05A, 16, and 22A from NJ and NY City

PC sound card interfacing for RTTY SSTV PSK31, collection of interface connections to choose from when having a desire to use the Soundboard

Winrad is a free software program designed to implement a Software Defined Radio (SDR), meant to run under Windows XP, Windows 2000, or Windows 98SE. In a nutshell, it accepts a chunk of up to 96 kHz coming from a complex mixer in form of two signals, I and Q, fed to the PC sound card.

Amateur and commercial towers

Shows QSO and SWL in real time, taking data from many different sources (DX-Cluster, WSPR, Reverse Beacon). It also allows to send DX-Spots and more features.

Amateur radio HF amplifiers and power supplies manufactured in Australia

"Some have called the T2FD a ""squashed rhombic"" antenna. It does bear some design similarities to the non resonant rhombic, but theoretically it is admittedly inferior. However, the T2FD performs well in a modest amount of space."

A free soundcard application supporting PSK31, PSK63, RTTY, CW, and Phone operation. It can decode all PSK QSOs within a 4 KHz segment, maintaining a sorted list of heard callsigns; it can simultaneously decode RTTY via soundcard and an external modem, generates CW directly or via WinKey, and includes a voice keyer. WinWarbler interoperates with the free Commander, DXKeeper, and SpotCollector for transceiver control, logging, and spotting.

2 meters copper tube antenna, tested with an Icom IC-V8000

HF receiving loop antenna, an easy-to-make receiving loop antenna for HF

Amateur radio kits by Kanga US.

A software defined radio by Alberto I2PHD

40 and 20 meters mobile antenna

The G3JVL 6 Meter ground plane vertical is a compact antenna that is ideal for portable operations. If needed, it can be disassembled into a very small bundle no longer than the longest element.

Circuit diagram and discription of 7 MHz Ham Radio SSB Transceiver. Transceiver using two MC1496, 4.43 MHz Ladder filter, LM386, LM324 and IRF840 in final.

WinDRM is the hottest digital mode on HF today! Nothing else exists where you can transfer data at almost 1KB/s without using proprietary hardware. HF Digital Radio Mondiale allow fast data, pictures, and voice over a 2.5Khz bandwidth

Homebrew a 5/8 wave ground plane antenna for 10 meter band. Interesting article with lots of pictures and homebrew details.

Swisslog, a robust freeware logging program, integrates seamlessly with various external devices and online services, making it a central hub for station operations. My field experience with similar logging software confirms the critical importance of features like real-time logging to services such as eQSL, QRZ, and Club Log, which Swisslog supports with both upload and download synchronization. The program also offers comprehensive award tracking for approximately 150 built-in awards, with the flexibility to add more, alongside detailed statistical reports. Beyond basic logging, Swisslog provides advanced functionalities like direct interfacing with popular digital mode software including WSJT-X, JTDX, and FLDIGI, ensuring accurate and rapid QSO entry for FT8 and other modes. It also supports multiple transceiver control (up to 8) from major manufacturers like Yaesu, Kenwood, and ICOM, and integrates with rotor control systems such as ARS-USB and Hy-Gain DCU. The _DX-Cluster_ integration is particularly useful, displaying spots with real-time award status and automatic detection for SOTA, POTA, and WFF from spot comments, which can significantly improve DXing efficiency. The software's world map feature includes various projections and layers for DXCC, IOTA, and WAZ, with a **double-clicking** function to turn the rotor, and provides accurate propagation predictions. It also supports multiple callbook and QSL manager databases, including QRZ and HamCall, and offers _multilanguage_ support in English, French, German, Italian, Portuguese, and Spanish.

General instructions for wiring a microphone to a radio

Antenna suitable for all the HF amateur bands, including the so called WARC bands by vk6ysf

Digital modes decoding software for the macintosh. Decodes CW, RTTY, WEFAX, SATFAX, ACARS, DTMF, SSTV

Program for amateur radio digital communications via a sound card. Supported modes are RTTY (Baudot code), ASCII (7 or 8 bits), PSK31 (BPSK and QPSK) and AMTOR-FEC (SITOR-B, NAVTEX). SELFEC SITOR decoding is possible also. No additional hardware required, need only a sound card. Optionally you can use simple circuit fo PTT-control. Can cooperate with RZ4AG AAlog logger.

Galaxy DX 47HP and DX 99V2 models are highlighted, showcasing the manufacturer's current offerings in both amateur and Citizens Band radio transceivers. The site details several amateur models, including the DX 29HP, DX 44HP, DX 55HP, DX 98VHP, DX 33HP2, and DX 94HP, catering to different operational needs and power levels. For CB operators, a range of models like the DX 2547, DX 979, and DX 929 are presented, with specific features such as _StarLite_ front panel lighting for low-light conditions, as seen on the DX 929 and DX 979. The DX 979 is noted for its compact form factor and SSB capability, making it suitable for installations where space is a constraint. Conversely, larger models like the DX 939, DX 949, and DX 959 are available for those with more room, offering features such as blue lighting and integrated frequency counters. The DX 939, for instance, combines aesthetic appeal with functional design, providing clear readouts and robust audio performance. A downloadable CB radio shopping guide is also offered, enabling users to compare Galaxy's product specifications against other radios on the market, facilitating informed purchasing decisions.

HF Horizontal Center-Fed Antenna

Ottawa EMS live police radio, and emergency services canada

Online computer-based training for the amateur radio written exams

An on-line javascript calculator and quite a few pictures to show how to make a helix antenna.

This compact 160m antenna is a half-wave dipole with a vertical section. It requires no radials and has worked well for me.

An efficient program to calculate dimensions of coax dipoles, or bazooka antennas considering velocity length of different coax cables. Express dimensions in feet/inch and meters/cm. Freeware by VE3SQB

A magnetic loop antenna for 144 mhz, two meter band

A multi band inverted delta loop antenna project that can be used from 40 to 10 meters band with full details and analysis of antenna performances on each band, document includes EZNec reports and setup pictures

Home brew a long wire balun

Program to receive weather reports and navigational warnings transmitted on longwave and shortwave bands in RTTY and NAVTEX modes. None additional hardware is required - your need only receiver and computer with a sound card.

Tthe ultimate program designed to connect you to ACARS systems around the world via the Internet

813 Linear Amplifier Project includes many schematics, drawind and assembling construction