mobile al

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mobile al

197 links - and 4 categories

Antennas : End-Fed : End Fed Half Wave Antenna
  • Comparing Mobile whip versus EF HW Vertical - PH0NO conducted field tests comparing a mobile antenna (DX-UHV) to an end-fed half-wave wire. Results on 20m showed the end-fed wire outperforming the mobile antenna, with a significant difference in signal strength. On 40m, the end-fed wire surpassed the mobile antenna in spots and reach. While the mobile antenna is more practical, the end-fed wire offers superior performance. Further testing is planned.
    [ Hits: 81 | Votes: 0 | Rating: 0 ]
Antennas : Mobile
  • DIY Portable Car Whip Antenna - Being frequently away from home, the author owner of an Elecraft KX3 missed the opportunity to work /M. They devised a portable antenna solution, incorporating a coil and car body, enabling multi-band tuning. Despite its unconventional design, the antenna exhibits promising performance, resembling a vertical dipole.
    [ Hits: 53 | Votes: 0 | Rating: 0 ]
Antennas : Satellite
  • Eggbeater Mobile Antenna - The eggbeater antenna uses on mobile operations using the metal roof of the car as the reflector. The distance between the antenna and the roof as described in this article should be 1/8 lambda.
    [ Hits: 121 | Votes: 0 | Rating: 0 ]
DX Resources : DX Stories Ham Radio : Exams : Exam Practice
  • ARRL Exam Review for Ham Radio - Online browser-based resource for your computer, tablet or other mobile device. Use this review and practice exam resource with the current editions of ARRL License Manuals.
    [ Hits: 67 | Votes: 0 | Rating: 0 ]
Manufacturers : Interfaces
  • Digirig Mobile - Digirig is an open-source integrated digital modes interface for amateur radio. As a differentiating feature, Digirig only requires a single USB connection to the computer with all the digital goodness packed in a single small enclosure. The internals include a USB hub, audio codec, a fully featured serial CAT (Computer Aided Transceiver) interface, and potentially other modules such as GPS receiver for time synchronization.
    [ Hits: 148 | Votes: 1 | Rating: 2 ]
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: 48 | Votes: 1 | Rating: 1 ]
Operating Aids : Radio Spectrum
  • Taking a look at the 900 MHz band - Use of the band as Amateur Radio is secondary in this band to federal radiolocation systems, industrial, scientific and medical devices, federal fixed and mobile systems and the M-LMS. Bandplans for hams. Allocation in 902 - 928 MHz
    [ Hits: 50 | Votes: 0 | Rating: 0 ]
Operating Modes : GPS
  • Homebrew GPS tracker - It is easy today to build a GPS tracking system for mobile applications that can be adapted to your needs. In fact, it is more accurate to speak of a GNSS (Global Navigation Satellite System) tracker, a term which encompasses the 4 positioning systems or satellite constellations.
    [ Hits: 241 | Votes: 1 | Rating: 7 ]
Operating Modes : Mobile
  • A Magic Ground Mobile Antenna - Experimenting and testing vertical antenna for HF bands on mobile operations.
    [ Hits: 113 | Votes: 0 | Rating: 0 ]
  • 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 : Portable Operations
  • Reducing the Cable Mess - Optimizing the cable connections for cat control and audio input output by implementing the digirig mobile. A small audio and rig control interface, with a single USB cable supports most QRP radios requiring external audio and CAT control facilities
    [ Hits: 155 | Votes: 0 | Rating: 0 ]
  • Pedestrian Mobile BackPack - Description of an optimal backpack used for pedetrian mobile operation both on HF and VHF bands.
    [ Hits: 138 | Votes: 0 | Rating: 0 ]
Software : Internet Linking
  • AllScan - AllScan is a free and open-source web app for AllStar nodes that provides Favorites Management features, AllStarLink Stats integration, and connection monitoring and control functions. Shows your favorites in a Dashboard summary table with Keyed status, Connected Node count and other statistics. Continually scans the status of each favorite using ASL's Stats API data showing which favorites are active and have recently been active. Allows favorites to be connected with a single click (optionally automatically disconnecting any currently connected nodes first). Allows the Favorites Table to be sorted by Node#, Name, Description, Location, etc. Favorites can be added/deleted simply by entering the node# and clicking a button. These features finally give AllStar nodes similar memory management and scan capabilities that analog radios have had for decades. AllScan is mobile-friendly and optimized for ease of use on both small and large screens. AllScan follows the latest web development standards, with PHP, JavaScript, HTML, and CSS cleanly partitioned, runs on both ASL and HamVOIP, and is very easy to install, configure, and update.
    [ Hits: 20 | Votes: 1 | Rating: 8 ]
Technical Reference : Keyers
  • ESP32 CW Keyer - ESP32 portable CW Keyer with touch buttons and bluetooth interface, allows control from mobile phone and other devices, Up to 25 pre-saved messages, Variable speed from 5 to 70 wpm.
    [ Hits: 173 | Votes: 1 | Rating: 1 ]
Technical Reference : Microphones
  • Alinco DR-605 Microphone Cable Repair - Repairing the RJ45 plug end of the mic cable of a Alinco DR-605 dual band mobile transceiver. Alinco microphones are well known for the cable jacket getting brittle and breaking
    [ Hits: 125 | Votes: 0 | Rating: 0 ]
Technical Reference : Test Equipment : RF Probe
  • A Simple Field Strength Meter - Mad your own simple FS meter. It is the simplest thing to make and is good enough to see if the antenna under test is radiating more power than your old ground plane, old mobile vertical or just radiating at all in a particular direction or in all directions.
    [ Hits: 158 | Votes: 0 | Rating: 0 ]

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