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

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

An comprehensive article on 40 meters antenna comparing vertical height to the resulting gain

Joe Carr's Radio Tech-Notes Installing Coaxial Connectors

A low-cost SWR meter project based on Arduino that works with AutoCap automatic antenna tuner for magnetic loop antennas

Presents the Holy Cluster, a contemporary DX cluster service offering real-time amateur radio spot data. This platform integrates a dynamic graphical map to visualize current contacts, enhancing situational awareness for DXers and contesters. Developed by an Israeli group of developers and supported by the Israeli Association of Radio Communication (IARC), the Holy Cluster aggregates DX spots from various sources, including traditional telnet clusters, the Reverse Beacon Network (RBN), and PSK Reporter, providing a comprehensive view of band activity. The cluster's design emphasizes a user-friendly interface for monitoring DX activity across multiple bands, including dedicated support for JOTA (Jamboree On The Air) operations. Its aggregation capabilities allow operators to quickly identify propagation openings and active stations, streamlining the process of making two-way radio contacts. The integration of RBN and PSK Reporter data offers insights into propagation conditions and station reception reports, which can be invaluable for optimizing antenna direction and operating strategies.

Restoration of Viking Valiant, Hammarlund SP-600 and Heathkit HX-10 Marauder by KG9OM and KJ4W

50 Plus Years of Ham Radio

KB22UT Article on how protecting ham radio station and in particular I/O Lines such as AC power, coax cable, control circuits, telephone line.

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

Six meters (6m) operation and satellites and two meters band

Kenwood TS 480 english manual in pdf format

This app will give you a 16 tone DTMF keypad and the ability to generate custom DTMF sequences, and set the duration and tone to silence ratio. Includes the characters 1234567890*# and the menu tones ABCD. You may enter a custom sequence via the keypad, soft keyboard, or speech if your device already has speech-to-text capability. This is basically a touch tone telephone keypad, which may be of interest to amateur ham radio repeater operators

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

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.

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

Several HD video overlay devices are offered, including the GeoStamp HD, which overlays GPS latitude, longitude, heading, speed, altitude, date, time, and depth onto AHD, HD-TVI, and HD-CVI (720p/1080p) video sources. The VideoStamp HD allows user-defined text overlays on similar HD video inputs, while the VideoStamp Keyboard HD enables text input via a PS/2 keyboard for video overlay. For commercial applications, the PostMark HD integrates with cash registers and POS terminals to overlay transaction data onto security camera feeds. Beyond HD video solutions, the DTMF-8 DTMF Decoder provides remote control capabilities for up to eight devices or relays using touch tones from a radio or other audio source. This decoder supports four operational modes and includes password protection, storing all settings in non-volatile EEPROM memory. The product line also includes standard definition OSD, RS-232, GPS, and POS text inserters, along with various DTMF encoders and DVR solutions.

Awards, contesting, dxing, IOTA and Island info, on-line log searches, and much, much, more.

WeatherExperts.Com, the premier online store for weather stations, instruments, anemometers, barometers, accesories, and satellite pictures. Excellent prices!

An interesting article on choosing the right battery when operating in portable mode, considering charging time and modes, weight and size.

Eme operations from Anchorage, Alaska by KL6M ex AL7OB

An Easy to build and operate induction generator

Total Internet Linking information...

Evaluation of various operating modes on 600 meters

Sensitivity of multi turn receiving loops William E. Payne, N4YWK

Study of the Coaxial Dipole: Just how does this thing work.

RG-174/U article on usage by AA5TB

Homepage for SND Tube Sales

"Home page of Slovenian Amateur Radio Club ""Slovenija"" - S51SLO"

Chicago's oldest and best amateur radio club

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.

Noise Meter software for the noise meter tool by G8KBB that measure noise using a PC sound card and calculate noise figures by means of a calibrated noise source.

Translates CAT PTT commands into COM port DTR line changes. Use COM port PTT instead of CAT PTT control.

Radio Amateur organisation of Flanders in Belgium.

Tips and tricks in RTTY Contesting by VA7ST

Garland Amateur Radio Club (GARC) K5QHD Garland, Texas

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

The following are the opinions expressed by various amateurs.

An excel spreadsheet that in a really simple way checks how much to trim your antenna elements. Download the xls file and watch the presentation video include in this page

WA0SXV article on the ICOM IC 756PRO based on his own experience

A view on TS570 sensitivity, a plot from 1.8 MHz to 60 MHz

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.

The InterCity Amateur Radio Club welcomes you to Mansfield, Ohio.

Online websdr receiver based in Rome Italy provides a nice user web interface and receiver most of the amateur radio HF bands

AM DXing taken to the extreme. Reports and station logs from DXpeditions to Arctic Northern Finland. Also articles, QSL news, links, audio and video on AM DXing. Published by Finnish DXer Mika Mikelainen.

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

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

Pacific Division of the American Radio Relay League

KD8KSB realization of the CJU satellite antenna that allow similar performance to the arrow antennas.

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.