Search results

The article "Exploring the World of 10 Meter Beacons" by Ken Reitz, KS4ZR, provides an in-depth look at 10-meter beacon operations, focusing on their utility for propagation analysis. It details FCC Rules part 97.203 governing beacon stations, including license requirements, power limits (under 100 watts), and the specified band segment of 28.200-28.300 MHz for U.S. operations. The content highlights the diversity in beacon construction, from converted CB radios to home-brew QRP transmitters, and discusses the robust operating conditions these 24/7 stations endure. The resource presents several case studies of active 10-meter beacon operators like Ron Anderson KA0PSE/B, Domenic Bianco KC9GNK/B, and Bill Hays WJ5O/B, detailing their equipment, antenna setups, and typical signal report volumes. It also introduces the NCDXF/IARU International Beacon Project, which features 18 synchronized beacons worldwide transmitting on 28.200 MHz at varying power levels (100W, 10W, 1W, 100mW) to facilitate propagation testing. The article also covers the PropNet Project utilizing PSK31 on 28.131 MHz and the 250 Synchronized Propagation Beacon Project on 28.250 MHz. Practical advice for monitoring includes using the RST reporting method, understanding the impact of the solar cycle on 10-meter propagation, and tips for setting up a personal beacon, such as frequency selection and power output considerations. The IY4M Guglielmo Marconi Memorial Beacon Robot on 28.195 MHz is also mentioned for its automatic QSO mode. The article concludes with a list of other resources for 10-meter beacon information.

Rochester Hamfest and Computer Show

PA1G loop antenna for 80 meters band, in dutch

Grid Square and Distance calculator by w3km

A compact antenna contender for 160 meters.

Electronic circuit and components layout fot this VHF Preamp

CB shop in north France

CocoaModem is an opensource MacOSX application which implements modems (modulator-demodulators) for RTTY PSK MFSK Hellschreiber CW SITOR HF-FAX provided by W7AY

The G5RV antenna, a popular multi-band wire antenna, typically employs a center-fed design with a specific length of 300-ohm or 450-ohm open-wire line acting as an impedance transformer, feeding a coaxial cable run to the shack. Its overall length for 80-10 meters is approximately 102 feet (31 meters) for the flat-top section, with a 34-foot (10.36 meter) matching section. The original design by Louis Varney, G5RV, aimed for efficient operation on 14 MHz (20 meters) as a 3-half-wave antenna, with the matching section providing a good match to 50-ohm coax on that band. While the G5RV offers multi-band capability, its performance varies across bands, often requiring an antenna tuner for optimal SWR on bands other than 20 meters. The matching section's length is critical for its impedance transformation properties, influencing the feedpoint impedance presented to the coaxial cable. Variations like the G5RV Junior and ZS6BKW utilize different flat-top and matching section lengths to optimize performance for specific band sets or to achieve a lower SWR without a tuner on certain bands, demonstrating the adaptability of the basic G5RV concept.

The page provides detailed information on coax stub filters for multi-transmitter setups, including specific lengths for different bands and types of coax. It also references additional technical notes for further analysis.

For two purposes a Cross-Yagi can be useful Satellite work or if you need both vertical and horizontal polarization for terrestrial contacts

Icom IC-9100 pre release product infomration

Daiwa Industry, maker of power suppliers, coax cable and antenna switches, power meters, SWR meters, DC-DC converters

DL2HRF shortened dipole antenna for 80 meters band

General Coverage TX Mods by G1IVG.

Morse Code Keyers / Processors and other PIC products. CW RTTY serial and usb interfaces and keyers kits.

7 dB for 7 Bucks, a 2 meter beam antenna for the cost of a fast food meal!

Article about omega and gamma matching, related to bandwidth, loss and component failures, heating and power ratings

A database which allows the user to store and catalog QSL cards

160m T Antenna broadcast design by Guglielmo Marconi has been built and is used by Jim NN4AA on 160m. Article by G7LRR

Assorted Grounding Hints and Kinks and Technical Correspondence, Grounding Techniques, Conductivity in the Cold, Cold Ground, Is Your Radio Equipment REALLY Grounded?

This page is a short description of the four phased verticals system i've build and used. It is primarily intendend to be used on the lower bands 160m, 80m, 40m.

Homebrewed jpole antenna for 50 mhz by IW0BZD, include pictures and schematics, in italian.

One of the most popular Ham-lore rumors is a balun's performance can be tested or evaluated by grabbing the coax and watching for an SWR change. This is probably one of the worse test-rumors circulating

Connecticut's largest online scanner site

IZ7GJX Comparing Kenwood TS-2000 to Icom IC-7000 on various ham radio bands

Amateur Radio Ham Radio Maidenhead Grid Square Locator Map online. This map allow just a point and click to determine dynamically the correct six characters locator. Other functions allow to calculate the distances among two given locators, or coordinates. Hover over map, specify grid, or enter latitude and longitude to show grid and/or calculate distance. Map is powered by Bing Maps.

ARS repairs all major brands of Amateur Radio equipment (Icom, Kenwood, Yaesu, Alinco, etc.) in our Portland Oregon area service facility

Kenwood, AOR, CB antennas and accessories.

Yo5ofh j-pole antenna plans for 2 and 6 meters

eham FT-1000MP MKV review

Radio scanner frequencies for nsw

A project of VHF regenerative receiver by VK2ZAY

Design and manufacturing of electronic components, kits, and accessories for the amateur and commercial communications. CMOS Keyers, W1AW receivers, PC borads kits

RF Choke to prevent hf currents on the feedline or...1:1 Choke Balun, sometimes called the "UGLY BALUN"

Sound samples of the transmission modes recorded at 11025 samples per second, mono and the message in all of the samples is the same: "the quick brown fox jumps over the lazy dog 1234567890".

For amateur radio operators running Microsoft Windows XP or later, Lux-Log provides a robust logging and contest software solution, designed by Norbert Oberweis, LX1NO. It is capable of managing over 30,000 logbooks within a single database and image copy, offering comprehensive data handling features. The software facilitates data import and export via **ASCII** and **ADIF** formats, ensuring compatibility with other logging applications, and includes an integrated tool for converting data from other programs into ADIF. It provides instant feedback on previous contacts and country information during data entry, alongside static or serial value generation for contesters. Lux-Log integrates a versatile award module, currently supporting 123 definitions for popular awards such as DXCC, WAZ, WAS, US Counties, IOTA, and more. Operators can generate pre-defined and user-definable data queries, visualize statistics through bar/pie charts, and print QSL labels. The software also interfaces with the RAC Callbook and HamQTH, supports LoTW, and offers radio control for Icom and Yaesu FT-857 transceivers. Additionally, it supports telnet connections to internet clusters and integrates with K1EL's WinKey for CW generation, making it a comprehensive tool for both general logging and contesting activities.

A page with several coax cable characteristics comparison. Includes RG-316 RG-174 RG-58/U RG-59 RG-213/UBX RG-213 FOAM AIRCOM plus AIRCELL 7 ECOFLEX 10 ECOFLEX 15 H-155

Located in Mareeba, Australia.

Project and schematic of a regenrative receiver by AA5TB

GRIDX, a BASIC program that calculates grid squares and Great Circle headings and grid.exe, a grid locator calculator

APTDecoder is a free software for recording and decoding signals transmitted by NOAA POES APT enabled weather satellites. It is run on a NT-based version of Window

Splitting an antenna between two receivers or in use as the phasing harness in stacked antennas where there is a need to equally split the power from the transmitter between two antennas

K2HYD illustrate how to home made ladder line

A portable dualband dipole robust and compact antenna usable for horizontal and vertical polarisation by ON6MU

Manufacturer of throphies Awards, Plaques, Gifts, Banners

A large locator map of europe available also on printed format by remoteqth.com

EI7BA describes a nice selfmade Hexbeam project for a single band version.

A 40m through 20m QRO End Fed Half Wave Antenna Coupler by Steve Yates - AA5TB

Mizuho Tsushin Co. was a small Japanese manufacturer of QRP radios and kits, shortwave receiver accessories, and AM broadcast band receiver kits and antennas