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wireless

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Antennas : End-Fed : End Fed Half Wave Antenna
  • Full size 80m End Fed Half Wave Antenna - The author reflects on expanding their antenna for 80m coverage during lockdown. They extend the End Fed Half Wave (EFHW) using a Spiderbeam pole and "cheating" by dog-legging across their garden. Despite challenges, they achieve coverage for multiple bands with minimal cost. Practical Wireless features EFHW antennas, including a pre-made 20m EFHW extended for 40m.
    [ Hits: 70 | Votes: 0 | Rating: 0 ]
Operating Aids : History
  • Evolution of Car Radios: From Marconi to Motorola - his historical account traces the development of car radios from Marconi's mobile wireless telegraph station on a steam engine vehicle in 1901 to Motorola's iconic car radio models in the 1930s. It highlights key milestones such as Alfred Grebe's radio-telephone experiments on Long Island and the introduction of Marconi-Phone 8 radios by the Daimler Company in England. The narrative explores technological advancements, including the transition from TRF to Super-Heterodyne circuitry and the integration of push-button controls. The evolution from vacuum tubes to transistors and compact discs is also documented, showcasing the continuous innovation in automotive entertainment systems.
    [ Hits: 47 | Votes: 1 | Rating: 1 ]
Software : RF Design
  • AppCAD - Free windows application for RF Microwave and Wireless applications. AppCAD is useful for the design and analysis of many circuits, signals, and systems using products from discrete transistors and diodes to Silicon and GaAs integrated circuits. AppCad is a unique suite of RF design tools and computerized Application Notes to make your wireless design job faster and easier
    [ Hits: 128 | Votes: 1 | Rating: 8 ]
Technical Reference : Amplifiers : UHF Amplifiers
  • Homebrew 1 Watt 2.4 GHz Power Amplifier - This will show you how to add a RF power amplifier to your Proxim Symphony for under $50. The cost is reduced by using the existing components on the Symphony, such as the PIN diode switch, and just inserting a higher power final amplifier. Increase the RF output power of your wireless network card to 1 Watt.
    [ Hits: 157 | Votes: 4 | Rating: 6.5 ]
Technical Reference : LoRa and LoRaWan
  • A Comparative Study of APRS Tracks with 1W and 100mW LoRa Trackers - Exploring LoRaWAN Range, comparing the performance of 1Watt and 100mW LoRa trackers on daily commute. Analyzing APRS tracks, beacon statistics, and visual comparisons to uncover insights and surprises in the world of long-range wireless communication.
    [ Hits: 42 | Votes: 0 | Rating: 0 ]
  • LoRa in Amateur Radio - About LoRa, wireless communication technology designed to transmit data over long distances. LoRa provides a means for wireless data transmission over long distances with low power consumption. Practical applications of LoRa in amateur radio
    [ Hits: 98 | Votes: 0 | Rating: 0 ]

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