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Trained amateur radio communicators under ARES, RACES and Skywarn serving Harford County, Maryland communities

50 Plus Years of Ham Radio

Solar Panels, Grid Tie Systems, Solar Power Kits, Solar Cells and more. DMsolar carries solar energy products for your needs.

Live audio of the National Hurricane Center’s Skywarn Nets. This live feed covers several different states, and locations throughout the US including: TX, LA, MS, AL, FL, GA, SC, NC, VA, MD, DE, PA, NJ, NY, CT, RI, MA, VT, and ME

Radio electronic and antenna consulting, servicing and buildups of customer supplied components. Transmitter and receiver site work and on line help.

Notes on how to build an inverted V wire antenna with lenghts for all HF bands from 160 mtrs to 10 mtrs

Manufacture of microwave directional, omni directional, sector and multisector antennas with horizontal polarization for ISM band 2,4 GHz

Layman level explanations of "seemingly" mysterious LF MF and HF propagation occurrences.

Constructing an effective directional antenna for the 40-meter band presents unique challenges due to its physical size requirements. This resource details the homebrew construction of a 2-element _Moxon_ Yagi antenna specifically designed for 7 MHz operation. The author, TA7OM, provides a visual guide to building this antenna, showcasing the boom, element mounting, and feedpoint connections through a series of high-resolution photographs. While textual descriptions are minimal, the imagery clearly illustrates the mechanical aspects of the antenna's assembly. The _Moxon_ rectangle design offers a compact footprint compared to a full-size Yagi, making it a practical choice for many hams with limited real estate. The visual documentation allows builders to replicate the antenna's structure, including the use of PVC pipe for element support and the method for spacing the driven and reflector elements. The project emphasizes practical construction techniques for achieving a directional pattern on a challenging HF band, suitable for DXing and contesting.

The following are the opinions expressed by various amateurs.

CREST Communications REACT Team #4252 has been an active member of the community for almost 30 years and is one of the largest REACT Teams in the United States.

A 30 Meter Quarter Wave DIY Ground Plane Antenna that loads up nicely also on 12 and 6 meters

Total Internet Linking information...

Manually programming D-Star handheld transceivers like the _Icom ID-51A_ and _ID-31A_ can be a straightforward process, enabling operators to configure repeaters, simplex frequencies, and D-Star specific settings without relying on computer software. This method is particularly useful for field operations or when quick adjustments are needed, allowing hams to set up callsign routing, DR mode, and reflector links directly from the radio's interface. Understanding the menu structure and key sequences is crucial for efficient on-the-fly programming. Operators often find manual programming invaluable for activating new D-Star repeaters encountered during travel or for participating in local nets where specific G2 or G3 gateway configurations are required. While software like _CS-51_ offers convenience for bulk programming, the ability to manually input frequencies and D-Star parameters ensures operational flexibility. This approach also helps hams troubleshoot connectivity issues by verifying individual settings directly on the transceiver, ensuring proper D-Star registration and gateway access.

MyAntennas.com offers standard and custom made multiband antennas, Baluns, Common Mode chokes and accessories. All products are designed and made by Danny Horvat, E73M an antenna design engineer formerly employed by Cushcraft Corporation.

Homepage for SND Tube Sales

A freeware windows antenna design and modelling software developed by an amateur radio operators primarily intended for VHF yagi aerials.

Evaluation of various operating modes on 600 meters

Interface APRS to a weather station

About basics of the horn antenna used for many rf microwave antenna applications.

Steel City Amateur Radio Club Pittsburgh

UnidenCommander, Uniden Commander provides full control over your Uniden Bearcat scanner from your PC and even adds functionality which is not normally available on your Uniden Bearcat scanner.

First pictures and links for the Kenwood TS-990S HF and 50 Mhz transceiver releases in May 2012

Microhams is a dynamic organization of hams in the Puget Sound area. The club includes a broad range of people from our local tech industry who participate in just about every aspect of our hobby.

The largest domestic manufacturer ofair-dielectric variable capacitors located in edgerton, ohio.

The configuration of this antenna is a triangle with apex in the top of a very tall tree. The antenna is fed at a bottom corner using 450 ohm ladder line.

Log Search for 9M0L Log online

This manual is an edited version of the GAP supplied document, complete with diagrams, pictures and assembling notes by Mitch Baum AE2A. This is 29 pages document in PDF Format.

11 Years of monthly propagation reports from February 1988 to January 1999 by AD5Q

tk7 is open source software designed for the ICOM IC-Q7 walkie-talkie. Though tk7 is intended chiefly for Linux, MacOS X, and BSD users, it will work on Microsoft Windows too.

VK9MT Online Log Search - Mellish Reef 2014

A Few facts concerning GMT, UT, and the RGO

Mark Connelly, WA1ION article on Medium Frequency Amplifier Circuits in PDF format, include some RF amplifier schematics

Autocode makes a selection of fine morse code identifiers for commercial and amateur radio applications.

A multiband trapped end-fed antenna can cover 20 30 40m bands. An option for portable sota operations were weight end simplicity are essential

A 220-ft tower that has five catenary lines, each about 500 feet long. Four of these lines, running NE, SE, SW, and NW support four 1/4-wavelength wire verticals used in a 160-meter four-square antenna.

Valcom Guelph specializes in the design and manufacturing of a full range of MF Beacon 100 KHz - 600 KHz, AM Broadcasting 540 - 1700 KHz, HF 1.8 - 30 MHz, VHF 30 - 300 MHz and UHF 300 - 1,200 MHz and SHF up to 6 GHz antennas based in Canada

Homepage Of The Big Time Operators CB Club Based In Muncie Indiana USA

An home made end fed half wave antenna with a tuner box by NG0R

Used in the Kenwood TM-241, TM-741 2m module by W3KKC

A little information about my equipment, qsl cards etc.

Demonstrates a range of specialized radio frequency equipment and consulting services for amateur and professional applications. The offerings include _Vector-Finder_ direction finding antennas, various test equipment such as _gate dip meters_ and RF sniffers, and communications receiving adjuncts. Additionally, the company produces satellite antennas for weather satellite reception, voice amplification devices like the _Flex-Mike_, and custom prototype circuit boards. The company's product line addresses needs for precise RF measurement, signal detection, and specialized antenna systems, particularly for direction finding and satellite communications. Their historical association with National Radio (HRO) suggests a legacy in radio technology. The site also highlights a subsidiary, Sierra Mountain Products, which offers outdoor recreational gear, indicating a diversification beyond core RF manufacturing.

QRP Popular Frequencies, where to operate in QRP mode

This sweeper built for a narrow bandwidth filter adjustment, use a simple 555 version sawtooth wave generator.

Based in Virginia USA, offer repearing services for amateur radio equipment and related accessories

WA3KEY Virtual Collins Radio Museum. A complete resource for Collins Radio users, collectors and restorers.

Vintage radio equipment and memorabilia 1910 - 1950

Radials & Counterpoise

The range and coverage of your VHF transceiver will be limited to your radio horizon. How to calculate the visual horizon and how to determine the Radio Horizon

The CWJF CW Club website is a resource for Morse code radio enthusiasts in Juiz de Fora, Brazil. It provides information about the club, its activities, and contact details for those interested in joining. The site also includes news updates and event announcements for members and visitors.