lin of sight

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lin of sight

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Operating Modes : Digital Modes

  • Sights and Sounds of Digital Signals - Preview the waterfall signature of various digital signals and listen to the sound of the digital modes. Learn about the bandwidth requirements and why a linear transmitter path is critical to successful and correct use of many modes on the amateur bands by W1HKJ
    [ Hits: 1042 | Votes: 3 | Rating: 6.67 ]
Operating Modes : Mobile
  • A mobile radio installation - Detailing a Yaesu FT-857 and ATAS-120 installation in a 1997 Toyota Tacoma, the author used Polar Plot to map signal strength. Using a hand truck with a laptop, FT-817, and an Iron Horse antenna, they circled a chalk-outlined 100-foot diameter, revealing potential nulls towards the truck's rear and through the cab, offering insights into antenna performance.
    [ Hits: 43 | Votes: 1 | Rating: 3 ]
Operating Modes : Packet Radio
  • Introduction to HF Packeteering in the Modern Age - A brief overview of the current state of packet radio on the HF bands. In this comprehensive guide, the author navigates through HF packet radio, providing insights on the required equipment, protocols like Fx.25 and IL2P, and preferred ACDS segments. The post covers decoding and sending traffic, delving into optimal settings, recommended software, and common SSIDs. The author concludes by encouraging further exploration through additional reading and a Linux Packeteering series.
    [ Hits: 75 | Votes: 0 | Rating: 0 ]
Propagation : Resources
  • Here Comes the Sun - Propagation and Sun - Solar activity can aid or hamper HF propagation beyond line-of-sight range, WA1SVF and N6BV answers to questions about Sun influence on radio signals propagation
    [ Hits: 575 | Votes: 0 | Rating: 0 ]
  • Tropospheric propagation - Article about tropospheric propagation and the way in which radio signals at VHF and above propagate over greater distances than strictly line of sight in the troposphere
    [ Hits: 314 | Votes: 0 | Rating: 0 ]
Software : RF Coverage Mapping
  • HeyWhatsThat Path - HeyWhatsThat Path Profiler is an online useful tool to do a Line of Sight calculation between yourself and the another station
    [ Hits: 2840 | Votes: 6 | Rating: 7 ]
Technical Reference : AI Ham Radio
  • AI Projections for Ham Radio Modes in 2023-2025 - In an innovative analysis, Michael G7VJR employs NeuralProphet to predict ham radio modes' usage trends. The AI model, leveraging deep learning, forecasts a steady FT8 dominance, with slight declines in CW and Phone activities. This approach simplifies statistical predictions, showcasing the power of AI in understanding complex patterns and facilitating insightful time series projections. Access the freely available Club Log data for continuous exploration.
    [ Hits: 52 | Votes: 0 | Rating: 0 ]
Technical Reference : Amplifiers : HF Amplifiers
  • Building a Robust PL519 Tube HF Amplifier - his article explores the construction of a PL519 tube amplifier, utilizing Ulrich L. Rohde N1UL's insights. Focusing on a modest 25W continuous output, the design ensures robustness with forced air cooling. The detailed breakdown covers input matching, screen grid voltage generation, bias adjustment, anode power supply, heater power supply, and monitoring circuitry, providing valuable guidance for ham radio enthusiasts.
    [ Hits: 41 | Votes: 0 | Rating: 0 ]
Technical Reference : Radio Frequency Interference : Noise Reduction
  • DIY EMC/RFI Mains Filter for a Clean Shack - Utilizing snap-on ferrite cores and practical insights, the author enhances their shack's cleanliness against electromagnetic interference. With meticulous experimentation and installation, they improve noise levels across HF bands, reflecting on the effectiveness of their filter in minimizing common-mode disturbances. Updates underscore ongoing refinement and cautionary advice for optimal filtering and radio reception amid changing RF environments.
    [ Hits: 69 | Votes: 1 | Rating: 10 ]

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