adi communications
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Antennas : Antenna Calculators- Online Yagi Antenna Calculator
- HF Beam Calculator for Amateur Radio and CB Communications
[ Hits: 545 | Votes: 16 | Rating: 5.5 ]
- Phased Array Antennas
- Phased array antennas are composed of multiple individual antenna elements that can have their phase and amplitude controlled to steer the main beam direction in real-time. They are used in radar, communications, and electronic warfare, and offer improved gain and reduced side lobes. A comprehensive document on Phased Arrays include techniques to increase the Antenna Gain and change the Radiation Pattern
[ Hits: 82 | Votes: 0 | Rating: 0 ]
- Ham Radio in Emergency Operations
- Understanding amateur radio communications resource, knowing when and how to use Ham Radio, integrating Ham Radio into the Emergency Management Community
[ Hits: 146 | Votes: 1 | Rating: 10 ]
- KD8CEC Amateur Radio Blog
- A personal blog about amateur radio activities, including homebrew, bitx, ubitx, mcHF, JT65, FT8 and more digital communications.
[ Hits: 253 | Votes: 1 | Rating: 10 ]
- Tuolumne County Amateur Radio Electronics Society Ham Radio Club - TCARES
- The TCARES membership provides communications assistance with fires, floods, search & rescue, and health & welfare message assistance to the Red Cross, without pay, using their own equipment, usually in twelve hour shifts.
[ Hits: 166 | Votes: 0 | Rating: 0 ]
- Pikes Peak Radio Amateur Association (PPRAA)
- The Pikes Peak Radio Amateur Association (PPRAA) is an American Radio Relay League (ARRL)
Special Service Club located in Colorado Springs, Colorado. The PPRAA is a social and technical membership organization which provides educational and recreational activities for its members intended to further their knowledge in the art of radio communications.
[ Hits: 63 | Votes: 0 | Rating: 0 ]
- Loudoun Amateur Radio Group
- The Loudoun Amateur Radio Group (LARG) of Loudoun County, Northern Virginia, was founded in July 1993. LARG is a family oriented club with a wide variety of activities and interests. Some of these activities include public service, emergency communications support, high altitude balloon radio, camera and video flights, fox hunts, contesting and radio sport DX-ing
[ Hits: 69 | Votes: 0 | Rating: 0 ]
- KC7NYR Amateur Radio Site
- This Website is here to enhance the Amateur Radio experience and for those who are interested in multiple areas of our great hobby. We have information about Amateur Radio Emergency Communications. There are many areas in our great hobby that serve different capacities, ARES, RACES, NTS, FEMA, Linux, and much more.
[ Hits: 76 | Votes: 0 | Rating: 0 ]
- Hands Free - Radcom Labs
- The SAFE SPEAK HF3 is the third generation of a unique Hands-Free microphone system for two-way radio communications. The HF3 can be used with almost any radio transceiver and is ideal for permanent installation in a vehicle or temporary use during emergencies or special events.
[ Hits: 173 | Votes: 1 | Rating: 10 ]
- Getting Started with Satellite Communications
- An introduction article about how to start with amateur radio satellite communication. In this article, the author includes information on how to home brew your own dual band satellite antenna
[ Hits: 332 | Votes: 5 | Rating: 8.8 ]
- HF communication prediction tools
- Online HF Communication prediction system provided by the Australian Governament Buerau of Metereology allow to predict usable frequency rage for radiocommunications between two stations allowing to specify frequency and date range. This tool allow calculation with different methods and algorithms
[ Hits: 168 | Votes: 0 | Rating: 0 ]
- Monitoring The Airwaves During Ukrainian Conflict
- This article reports and collect some frequencies used during 2020 Ukraine war and reported as being used by army forces. HF communications are still a crucial part of military communications and can ben monitored on web sdr radios available on the internet.
[ Hits: 528 | Votes: 3 | Rating: 9.67 ]
- Scanning frequencies
- HF digital mode transmissions, voice transmissions in HF and VHF Bands collected in several XLS files by Relic Radio communications
[ Hits: 136 | Votes: 0 | Rating: 0 ]
- Tot Radio
- Two-way radio communications, amateur radio, CB radio, service repair
[ Hits: 79 | Votes: 5 | Rating: 10 ]
- Handytron
- Two-way radio communications, amateur radio, cb radio shop based in Madrid Spain
[ Hits: 300 | Votes: 0 | Rating: 0 ]
- BridgeCom Systems Inc
- Our mission is to provide our customers with a communication solution that fits a need and provide high quality customer service. We specialize in the development and sale of communications equipment for land mobile radio, amateur radio, commercial radio and RoIP (Radio Over IP) solutions.
[ Hits: 114 | Votes: 0 | Rating: 0 ]
- DIY Ham Radio Loudspeaker
- An interesting article on how build an optimal sounding communications loudspeaker capable to optimize sound reproduction at the frequency range from 150 Hz to 3 kHz.
[ Hits: 518 | Votes: 0 | Rating: 0 ]
- Stingray Marine Transceiver
- Recently, at the Ballarat Hamfest, the author acquired an old Marine transceiver for just $10, charmed by its sturdy construction and waterproofing. Made by Findlay Communications in Sydney, this crystal-controlled transceiver had been dormant but was reinvigorated with minor fixes. A manual was sourced, and further repairs were made, including an ingenious crystal oscillator replacement using an Si5351a controlled by an Arduino. The refurbished radio, complete with a fresh coat of paint and added customizations, is now operational for 160m AM and 30m SSB. A successful and cost-effective restoration.
[ Hits: 55 | Votes: 0 | Rating: 0 ]
- Signal to Noise Ratio SNR
- Signal to Noise Ratio, definition and application to Radio Communications. Signal to Noise Ratio (SNR) is a figure of merit that compares the level of a desired signal to the level of background noise.
[ Hits: 132 | Votes: 5 | Rating: 8.4 ]
- Understanding computer-generated RFI
- Radio Frequency Interference (RFI) has always been a source of concern for the Radio Amateur. Until the recent introduction of complex circuitry in the home, our communications gear has been the main source of potential RFI. In this computerized age of ours, increasingly complex and sensitive receivers are being barraged by these and other sources of RFI.
[ Hits: 84 | Votes: 0 | Rating: 0 ]
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