transmission

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transmission

169 links - and 2 categories

Antennas : Multiband
  • Space-Efficient Excellence: Inverted L Multi-Band HF Antenna - Discovering a solution for limited space, the inverted L HF antenna emerges as a stellar performer. Half the size of a dipole, it ensures optimal installation in restricted areas, maintaining superb transmission (TX) and reception (RX) characteristics. Spectrum Communications' multi-band version, featuring traps, proves even more space-friendly without compromising performance. A fiberglass pole offers sturdy support, while proper grounding, an RF choke, and occasional tuning contribute to a high-performing and reliable antenna system.
    [ Hits: 165 | Votes: 0 | Rating: 0 ]
Antennas : Satellite
  • EggBeater Antenna for VHF UHF - This antenna was conceived mainly for high-speed digital transmission via satellite. The antenna is made of two full waves loops , mounted at right angles to each other. Then coupled together, 90 degrees out of phase over a horizontal circular reflector. With this configuration the antenna is omni directional and circularly polarized.
    [ Hits: 226 | Votes: 0 | Rating: 0 ]
Antennas : Theory : Impedance matching
  • The Smith Chart - This tutorial introduces and explains Smith Charts, and then gives an introduction to impedance matching. Smith Chart is a tool to visualize the impedance of a transmission line and antenna system as a function of frequency.
    [ Hits: 113 | Votes: 2 | Rating: 9.5 ]
Antennas : Yagi
  • DIY Yagi Antenna - This article describes the phases for the construction of a Yagi antenna. The calculations of the parameters are made using 4NEC2 software. This type of antenna is used for transmissions and receptions of electromagnetic waves. The project shown here refers to the frequency of 433.92 MHz.
    [ Hits: 107 | Votes: 4 | Rating: 3.5 ]
Operating Modes : VHF UHF
  • 40 MHz 8m Band Amateur Radio Exploration - The 8m ISM band, a unique frequency range between 10m and 6m, holds potential for amateur radio enthusiasts, yet it remains largely unallocated. This spectrum offers fertile ground for research and self-training. The author's experience with low-power transmissions and WSPR testing highlights the band's capabilities and the need for a narrow, speech-free amateur allocation to encourage experimentation. Discover the world of 8m ISM radio exploration and its future possibilities.
    [ Hits: 72 | Votes: 1 | Rating: 8 ]
Radio Equipment : HF Transceivers : Icom IC-706
  • Icom 706MK2G Repair  new - After years of reliable performance, a 26-year-old Icom 706MK2G exhibited an unusual deviation during FM transmission, with the actual frequency being 10kHz off from the displayed frequency. Additionally, the power meter showed a sharp dip during transmission. Upon investigation, it was discovered that the FM VCO voltage adjust variable had become dirty and sluggish over time. By adjusting the variable capacitor and cleaning it with switch cleaner, the issue was resolved, restoring stable power output and accurate frequency transmission.
    [ Hits: 15 | Votes: 0 | Rating: 0 ]
Software : Vector Network Analyzer
  • SNASharp - SNASharp is a free software application designed to work with scalar network analyzers compatible with NWT software from DL4JAL. It is used to measure and analyze the scattering parameters (S-parameters) of microwave devices. Provide several measurements and analysis tools including Smith chart, Polar plot, S-parameter tables, Transmission line calculator
    [ Hits: 65 | Votes: 0 | Rating: 0 ]
Technical Reference : LoRa and LoRaWan
  • LoRA Gateway IdeeTron Lorank8 - Testing IdeeTron Lorank8 for LoRaWAN with ham radio transmissions. Assessing compatibility, interference, and planning permanent setup. Follow the experimentation and integration into the Almelo Community page
    [ Hits: 19 | 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: 97 | Votes: 0 | Rating: 0 ]

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