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NHRC-2 Based Repeater Controller A perfect controller for a simple repeater or link, or portable/solar powered system.

EME, MS, Tropo from the island of Corsica

Interfacing the IC706MKIIG for Soundcard & TNC modes

1.5 dB of matched line loss can be calculated for a given transmission line using this online tool, which employs a model calibrated from empirical data. The calculator allows radio amateurs to input specific transmission line types, such as _RG-8_ or _RG-58_, and then determine the expected signal attenuation. This is crucial for optimizing antenna system efficiency and understanding power delivery to the radiating element, especially for HF and VHF operations where feedline losses can significantly impact performance. Beyond matched loss, the calculator also provides an estimate for mismatched loss if the Standing Wave Ratio (SWR) is specified. This feature helps operators quantify the additional power loss due to impedance discontinuities between the transceiver, feedline, and antenna, which is a common concern in amateur radio installations. Accurate loss calculations are vital for effective station design and for predicting actual radiated power. The tool's utility extends to various operating scenarios, from fixed station setups to portable deployments, aiding in the selection of appropriate feedline lengths and types to minimize signal degradation. Understanding these losses is a fundamental aspect of maximizing the effectiveness of any amateur radio antenna system.

Home page della Sezione ARI di Gorizia

List of APRS server worlwide mantained by ae5pl

Amateur Radio Hobbies of K4MDB

LU Argentina Country CALL division Antarctic and South Atlantic prefixes and sufixes

QJackRcd is a simple stereo recorder for Jack with few features as silence processing for automatic pause, file splitting, background file post-processing.

A page dedicated to the Heathkit GR-81 Regenerative Receiver

Bienvenue sur ma page personnel ! Welcome to my personal web pages !

Antennas, Transmission Lines, Tuners - Myths, Mysteries and Qualifiers By Don Wilhelm W3FPR

Intermittent fluctuations of SWR readings with MFJ 259B antenna analyzer.

If you like packet radio you will find me there.

Home page with links ham and more

How to program Baofeng handheld transceiver with satellite frequencies, and how to get alerts when satellites are visible by using a smartphone app. A beginners guide to work satellites with a common VHF handheld radio.

This 6 meter 2 element yagi antenna is simple, compact and effective antenna for 50 Mhz. The design antenna was optimized with AO for best match to 50 ohms, no matching network. A choke balun is recommended to decouple feedline currents.

Setting up a solar power system in your shack

Dave N9EWO's view's and comments on the Vertex-Standard-Yaesu (V-S-Y) VX-2R also compared to the Icom IC-P7A

Setting up a ZZ Wave antenna, a dual band loop antenna covering 80 and 40 meters.

Vasantha VU2VWN VFO controlled 40m Tansmitter schematics

Coil Q Measurements - With a special focus on wet coils.

This simple project, based on the orginal CobWebb-Antenna model, is about an horizontally polarized, omi-directional antenna for the six meter band.

eHam users review of the Ten-Tec Orion II model

A Linux Smith charting program. You can enter either discrete components or transmission lines, see the results on screen and/or generate Postscript output. Component values can be changed numerically or using scrollbar

Background: The PSK31 philosophy, The QPSK mode, Varicode, Sound Card DSP Setup and Operating Tips

RF/Microwave Simulator for Puppy Linux by WN2A

The Ft.McCoy Amateur Radio Club is a friendly Club located in the Ocala National Forest, Marion County Florida. The Club was founded in October 1997

H.E.A.R.T. Serving Pinellas County

Ari Lecce official web site

50MHz DX Bulletin edited by O. Bjorn Matt Madsen

Wideband receiving phased arrays with small electric or magnetic active wideband elements are discussed in details. Practical results and examples are given.

CW is not just another mode like SSB, FM, PSK-31, etc. It is a unique mode that has alot of advantages.

The largest and most up-to-date rankings of top-banders on the Internet.

Known Affectionately as the "GreenbrookRepeater"!

Hand made RF sweeper made to adjust the pass band of crystal filter

The Guernsey Amateur Radio Society (GARS) provides a central hub for amateur radio operators in the Bailiwick of Guernsey, offering resources like a local _GU Callbook_ and specific notes tailored for visiting operators. The society maintains an active presence, holding regular meetings on Friday evenings from 7:30 to 9:00 PM in a unique World War II bunker located within the grounds of the Beau Sejour Leisure Centre. Beyond in-person gatherings, GARS facilitates on-air activity with a 2-meter net operating on 145.525 MHz every Tuesday night at 8:00 PM. Additionally, a DMR net is hosted on Thursday nights at 8:00 PM via the _GB7GY_ repeater, catering to digital mode enthusiasts. These nets provide opportunities for local members and visitors to connect and exchange information. Phil Cooper, GU0SUP, serves as a key contact for the society, managing inquiries and web content. The club's location is precisely described as being down a concrete staircase to the left of the road when approaching the Concourse entrance, making it straightforward for newcomers to find their way to the club's distinctive meeting place.

Liga Panamena de Radioaficionados

Evaluation of various microphones on-air using an Icom IC-7700 by VA7JW

Provide an ATV repeater function for the North Jersey Exterior Area that is available not only for general amateur radio use, but also for providing a unique communications resource during emergencies as well (FCC Part 97.1 (a))

ARI Macerata Official Web Site

Pagina del Radio Club Trelew, provincia del Chubut, Patagonia Argentina

Homepage of radio club oz1als, contest results, pictures etc

To encouraging all aspects of Amateur Radio operation, including public service and radio experimentation for scientific improvement of the art.

VHF from Scandinavia, EME, Tropo, Aurora and expeditions.

On this page you will find information about previous, current and future operations of our contest team, different articles, links and info about contesting, DXing, contests calendar, propagation, antennas, equipment, awards, and much more.