log form

194 links - and 1 categories

5 element Yagi antenna for 10 meters band - This 10 meter antenna is right out of the ARRL Antenna Book. There are 5 elements on a 24 feet boom and it performs well from 28.0 to 28.9 MHz.
[ Hits: 194 | Votes: 2 | Rating: 6 ]

What is Horn Antenna - Horn Antenna - The energy of the beam when slowly transform into radiation, the losses are reduced and the focussing of the beam improves. A Horn antenna may be considered as a flared out wave guide, by which the directivity is improved and the diffraction is reduced. One of the first horn antennas was constructed in 1897 by Bengali-Indian radio researcher Jagadish Chandra Bose in his pioneering experiments with microwaves. The modern horn antenna was invented independently in 1938 by Wilmer Barrow and G. C. Southworth. This Horn model antenna is suitable employed in the UHF or SHF radio bands. Making this horn model antenna it will be easy for a beginner to make if it works in the 10GHz frequency, because small dimensions so it is not so difficult and also offers gain up to 25dBi.
[ Hits: 74 | Votes: 0 | Rating: 0 ]

Understanding Antenna Polarization - What is antenna polarization, and why does it matter. Horizontal versus Vertical versus Circular polarization. Undestanding how antennas perform better with different polarizations.
[ Hits: 169 | Votes: 1 | Rating: 2 ]

Vertical Antenna Wavelength Vs Performance - This article on basic antenna theory explains why is a 5/8 wavelength vertical antenna better than a 1/4 wavelength antenna
[ Hits: 140 | Votes: 0 | Rating: 0 ]

Modifications to the Diamond V2000 and similar antennas - This kind of antenna has grown in popularity over the last years because it gives you a decent performance and triband capabilities. But its 50 MHz design is far from optimal. Here you can learn how to improve its 50 MHz performance in a very easy way.
[ Hits: 631 | Votes: 2 | Rating: 9.5 ]

PY0F Noronha Contest Group - The Noronha Contest Group is a DX and Contesting group formed by experiencied operators from Brazil with the aim to have fun and participate on the main Amateur Radio Contests & Activities. QSL info, log online and contest results
[ Hits: 133 | Votes: 0 | Rating: 0 ]

TL8AA TL8ZZ DX Pedition - Information and Online log for TL8AA and TL8ZZ Central African Republic DX Pedition
[ Hits: 76 | Votes: 0 | Rating: 0 ]

NASA Cubsat Blog - A blog that provides news and updates about CubeSats, as well as information about CubeSat-related events and projects.
[ Hits: 10 | Votes: 0 | Rating: 0 ]

Silphase Technologies - Amateur radio SDR Receiver and Transceiver manufacturer , makers of the Silphase R1 an innovative HF receiver with high performance real-time spectrum scope.
[ Hits: 132 | Votes: 0 | Rating: 0 ]

EDI Log Format - EDI is a common electronic data file format required to submit contact logs. Very popular among contest logs formats.
[ Hits: 175 | Votes: 0 | Rating: 0 ]

QSO map generator - With this tool it is possible to create QSO maps overlay on Google maps there each QSO get a line from the home location to each DX location. An EDI logbook file is used as input. The creation will only use complete locator in the 6 characters format.
[ Hits: 1037 | Votes: 6 | Rating: 3.83 ]

FT991 MARS Mod - This modification will expand the tx frequency range of the Yaesu FT-991 from allowing just ham radio bands, to all bands 1.8 - 30MHz and 50-54 MHz.This information is solely for use by licensed members of MARS (Military Affiliate Radio System) or CAP (Civil Air Patrol)
[ Hits: 926 | Votes: 5 | Rating: 3 ]

Maldol MFB-300 HF vertical antenna review - The Japanese-made Maldol MFB-300 HF vertical antenna offer extremely wide-band performance, with a specified frequency range of 1.0-60 MHz.
[ Hits: 433 | Votes: 2 | Rating: 5.5 ]

Wuxi Venus Information Technology - Wuxi Venus Information Technology is an amateur radio devices dealer in China, source for high end, high performance RF products,Control products,APRS products and Commercial products. It provides a variety of solutions to the antennas systems, APRS,electronics kits and electronics components
[ Hits: 178 | Votes: 0 | Rating: 0 ]

JJY - JJY is a time signal transmitter operated by the National Institute of Information and Communications Technology (NICT) in Japan. It broadcasts on two frequencies, 40 kHz and 60 kHz, and is used for time synchronization in Japan.
[ Hits: 31 | Votes: 0 | Rating: 0 ]

Tucnak - Tucnak is multiplatform VHF/HF contest logbook. It is executable on Linux and other unix-type systems. Since v3 also native under MS Windows, Android and Kindle
[ Hits: 139 | Votes: 1 | Rating: 10 ]

Master Callsign Database Editor - Master Callsign Database Editor allows to create and modify Super Check Partial database files used by many contesting programs in DTA and SCP formats. The files produced by Master Editor in DTA format can be used with CT, WriteLog, TRlog, SD, and others. The SCP versions of the produced files are for use with Win-Test, N1MM+, and others. Master Editor allows to create a callsign database from a separate log or from a set of logs in the Batch Import mode.
[ Hits: 248 | Votes: 0 | Rating: 0 ]

Log Book MDB to ADIF utility - This utility will convert any amateur radio logbook that has been stored in Microsoft Access MDB format and convert the file into either a delimited CSV file or to an ADIF formatted file
[ Hits: 242 | Votes: 1 | Rating: 5 ]

VSPE - Free Serial Port - Virtual Serial Ports Emulator for Windows. Virtual Serial Ports Emulator tool (and VSPE API) is free on 32 bit platform and can be used with no charge for any purpose. No registration or activation key is required.
[ Hits: 721 | Votes: 2 | Rating: 1 ]

VARA - VARA HF is a soundcard modem that can be found on the HF bands exchanging traffic (Winlink). VARA implements an High Speed Data Mode and comes in 2 separate programs VARA FM and VARA HF. VARA is a High Performance HF modem based on OFDM modulation. VARA Modem, brings state of the art Military grade technology to new and existing HF data. Introduces a new standard of technology available for Amateur and Commercial use. Designed for operation within a SSB Bandwidth of 2400 Hz.
[ Hits: 105 | Votes: 1 | Rating: 10 ]