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940 links - and 2 categories

A portable 2-element VHF yagi ^pop - Build a portable VHF yagi antenna for 2 meters. All you need is two rabbit ear antennas from Radio Shack, two CATV baluns, four feet of 3/4 CPVC pipe with one tee.
[ Hits: 28667 | Votes: 26 | Rating: 7.23 ]
Portable Yagi for 144MHz - Simple 7 element Yagi is ideal for portable operation. The elements can be removed and replaced in a few minutes. The 2.42 m boom will fit inside a car, the elements are made from 6mm solid aluminium rod.
[ Hits: 14334 | Votes: 35 | Rating: 6.83 ]

Transmission Lines - Whenever you choose a coax feedline, the frequency of operation is a very important consideration. Over the operating bandwidth of the coax the VSWR is low, typically 1.2:1 or better. Insertion loss is also an important parameter. It is usually specified in dB/foot and is a linear relationship.
[ Hits: 1274 | Votes: 0 | Rating: 0 ]

Yagi Element Mounting Considerations - One of the most important considerations when designing and building a Yagi antenna is the method used to attach the elements to a boom. This is true because the boom influences the electrical length of the elements. In this article JH Reisert explain with drawings techniques on mounting yagi antenna elements to a boom
[ Hits: 4306 | Votes: 2 | Rating: 8.5 ]

Antenna Selection Made Easy - This page will help you answer important questions about antenna selection before you talk to a supplier. After reading this paper, you should be able to better determine the most important parameters you need to know for your antenna selection criteria.
[ Hits: 2030 | Votes: 2 | Rating: 3 ]

Islands, Castles and Portable Operations - Island DXpedition and portable operations, including present, up-and-coming operations, IOTA, NON-IOTA, IOSA, IIA, ILIA, DIB, Lighthouse, and other Island Award Program operations
[ Hits: 885 | Votes: 0 | Rating: 0 ]

VU2LFA ham radio in india - This site is basically for the begeners (SWL) of india. This site is supporting to digital communication for hams also.
[ Hits: 396 | Votes: 8 | Rating: 7.5 ]

ESA Portal - Calling all radio amateurs - Radio amateurs worldwide are being asked to help collect data from the student-built SSETI Express satellite, due to be placed in orbit on 27 September. To encourage them, ESA�s Education department has organised two competitions and is supplying free downloadable software.
[ Hits: 514 | Votes: 0 | Rating: 0 ]

HF Antennas for restricted space - Arrl document about invisible antennas and indoor systems. It is important to consider that few compromise antennas are capable of delivering the performance one can expect from the full-size variety. But the patient and skillful operator can often do as well as some fellows who are equipped with high power and full-size antennas. The "cliff-dweller" may not be able to "bore a hole" in the band as often, and as easily, but DX can be worked successfully when band conditions are suitable.
[ Hits: 9199 | Votes: 7 | Rating: 5.28 ]

Auto Band Select Box for the FT-817 - This project is an interface box for the Yaesu FT-817 that includes a band output port, a computer serial interface, and a remote interface for the FL-7000 (and Quadra?) solid state power amplifiers
[ Hits: 2285 | Votes: 0 | Rating: 0 ]

Win APRS - Automatic Position Reporting System windows program, allow monitoring of real time geographical information such as the position of vehicles, the status of weather, radio direction finding and more.
[ Hits: 21391 | Votes: 26 | Rating: 5.38 ]
APRS-Beacon - The purpose of the APRS-Beacon is to provide simple APRS-compatible position beacons for up to three Objects. It is designed to 'stand alone' and does not monitor other traffic on the frequency. It can use a single-port TNC (in 'native' mode), a single- or dual-port TNC in Kiss mode or the AGW Packet Engine in order to transmit on up to four radio ports.(When running with AGWPE, APRS-Beacon will also work with Windows 2000)
[ Hits: 3424 | Votes: 7 | Rating: 2.57 ]

Smith Chart Software - SimSmith is a highly interactive, real time Smith chart graphing program. Circuits are constructed using drag-n-drop. Load files can be imported from the EZNEC and CocoaNEC antenna simulation software and from the AIM4170 and miniVNApro antenna analyzers. Circuits and load files can be of any size. Key Features: SimSmith is one of the few Smith chart packages which models transmission line losses. SimSmith also allows the description of circuit elements using algebraic equations. SimSmith has only one screen and allows the screen to be resized to increase workspace or readability.
[ Hits: 1573 | Votes: 6 | Rating: 6.5 ]

Contest LogChecker - Contest LogChecker is a set of contest tools for Microsoft Windows, combining advanced text editing with keyword highlighted, and the ease and flexibility of import, export, statistics and charting utilities. With LogChecker you can edit, fill in the log, check Cabrillo Format and Header, convert files from the most popular logging software to Cabrillo, print customizable files, calculate statistics and export logs to RTF, PDF or HTML for publishing. You can examine a log in many different ways by highly interactive methods. LogChecker includes a Master Callsign Database tool for managing databases, which have been generated from actual contest logs. Commercial
[ Hits: 3333 | Votes: 23 | Rating: 9.07 ]

RigResident - RigResident is a small program for RIG control, which does allow to set and read data of connected tranceiver (frequency, mode etc). RigResident supports more than 70 TRX models from ICOM, KENWOOD, YAESU and Ten-Tec.
[ Hits: 3710 | Votes: 4 | Rating: 7.1 ]
FTBCAT Cat radio control software ^updated ^pop - Free CAT control software for Yaesu FT-100, FT-100D, FT-817, FT-817ND, FT-847, FT-857, FT-857D, FT-897, FT-897D, FT-920, FT-1000MP Mark V, VR-5000 and FRG-100 transceivers. Version 2.1 for Windows. Ths Software no more supported or developed.
[ Hits: 49865 | Votes: 151 | Rating: 4.78 ]
ScanCat Lite Plus - Scancat-Lite-Plus for Windows supports the memory programming for Radio Shack and Uniden Scanners
[ Hits: 3342 | Votes: 8 | Rating: 5.25 ]

WD6CNF Voice keyer - Audio voice keyer Microphone input, speaker output Live microphone enable Record/play audio from twelve memories Display text of recorded audio Transmitter keyed via serial (com) port Loop (with variable delay) audio output
[ Hits: 7487 | Votes: 8 | Rating: 3.62 ]

ICOM IC-746PRO Dead TX - The purpose of this web page is to try to investigate the ICOM IC-746PRO Dead TX problem reported by many radio amateurs through out the world; and unfortunately not properly taken care of by ICOM. If you are the owner of either the ICOM IC-746PRO or the IC-7400 you may already have experienced the Dead TX Issue. If not you may sooner or later.
[ Hits: 3416 | Votes: 5 | Rating: 9.2 ]

Kenwood to pc serial ports - Simple, low cost interface between Kenwood serial ports and contest logging programs by Bob Wolbert, K6XX
[ Hits: 2269 | Votes: 0 | Rating: 0 ]