astro

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Search Results for "astro"

127 links - and 1 categories

Antennas : Feed Lines
  • SWR: Maximum allowable VSWR - VSWR (voltage-standing-wave-ratio) represents the degree with which an antenna is "matched" to the system impedance. Most modern antennas do not require any tuning for optimum performance. VSWR is one of the easiest parameters to measure and VSWR meters are becoming very popular antenna installation tools
    [ Hits: 1087 | Votes: 3 | Rating: 3.33 ]
Antennas : J-Pole
  • G4AON portable 6m J-Pole antenna - Ribbon cable J-Pole antenna for 6 Metres, with antenna picture and construction detail
    [ Hits: 4074 | Votes: 5 | Rating: 7.60 ]
Antennas : Portable
  • Portable HF antennas - Excel sheet containing technical comparisons of commercial HF portable antennas compiled by ON4SKY. Includes pictures, manufacturer, db gain, band coverage, F/B ratio, price, weight and dimensions.
    [ Hits: 2687 | Votes: 1 | Rating: 10.00 ]
Antennas : Theory
  • Antenna Selection Made Easy - This page will help you answer important questions about antenna selection before you talk to a supplier. After reading this paper, you should be able to better determine the most important parameters you need to know for your antenna selection criteria.
    [ Hits: 1827 | Votes: 2 | Rating: 3.00 ]
  • Antenna Polarization notes - Antenna polarization is a very important consideration when choosing and installing an antenna. Most communications systems use either vertical, horizontal or circular polarization. Knowing the difference between polarizations and how to maximize their benefit is very important to the antenna user.
    [ Hits: 2225 | Votes: 4 | Rating: 3.50 ]
  • Understanding Radiation Patterns - Understanding and using antenna radiation patterns
    [ Hits: 375 | Votes: 0 | Rating: 0.00 ]
Antennas : Theory : Antenna Gain
  • Antenna Gain - How much gain ? This article help you on understanding how read antenna gain values in order to evaluate antenna performance
    [ Hits: 5164 | Votes: 9 | Rating: 5.00 ]
Ham Radio : Blogs : USA Internet and Radio : Sounds
  • Listen to Radio Meteors live - Echos of USAF (Formally NAVSPASUR) radar signals reflected off of meteor trails received at Roswell, New Mexico
    [ Hits: 1226 | Votes: 9 | Rating: 6.22 ]
Manufacturers : Microwave Manufacturers : Power Supply
  • Astrodyne - Dedicated to the design, manufacturing, technical support, and delivery of innovative and cost effective power solutions for worldwide applications. AC/DC switching power supplies and DC/DC converters.
    [ Hits: 468 | Votes: 0 | Rating: 0.00 ]
Operating Modes : Amateur Radio Astronomy Operating Modes : Meteors
  • F5VLB amateur radio astronomy station Priority listing - F5VLB and EA4EOZ have designed a small but powerful system using satfinder and standard LNB to make radioastronomy. A step by step descritpion for the novice about radioastronomy, VLB and listening to echo of meteorite.
    [ Hits: 1243 | Votes: 3 | Rating: 10.00 ]
  • International Meteor Organization Links - Meteor societies, clubs, and projects, Observing Methods, Newsletters, mailing lists, and astrophysical periodicals
    [ Hits: 223 | Votes: 1 | Rating: 10.00 ]
Operating Modes : Portable Operations Operating Modes : Radio Direction Finding
  • Radio Direction Finding - introduction - History of Radio Direction Finding, performance and limitation of RDF Systems, RDF for non professional use
    [ Hits: 549 | Votes: 3 | Rating: 3.33 ]
Radio Equipment : HF Transceivers : Kenwood TS-2000 Radio Equipment : HF Transceivers : Yaesu FT-1000MP Shopping and Services : Ham Radio Stores
  • Memphis Amateur Electronics, Inc. - New and used ham radio equipment supplier. we carry hundreds of ham radio products including amateur radios from alinco, icom, kenwood, and yaesu, plus ham radio products from mfj, ldg, diamond antennas, hustler, ameritron, astron power supplies, and books .
    [ Hits: 2014 | Votes: 2 | Rating: 10.00 ]
  • Memphis Amateur Electronics - Carry hundreds of ham radio products including amateur radios from Alinco, Icom, Kenwood, and Yaesu, plus ham radio products from MFJ, LDG, Diamond Antennas, Hustler, Ameritron, Astron power supplies, and books of all kinds
    [ Hits: 1603 | Votes: 3 | Rating: 4.00 ]
Shopping and Services : Regional : USA
  • Radio Astronomy Supplies - Radio Astronomy Supplies astronomy products since 1994 including radio telescopes, LNA's, noise callibration source, books, videos.
    [ Hits: 158 | Votes: 0 | Rating: 0.00 ]
Technical Reference : Power Supply
  • Astron RS35m Power Supply Schematic - Astron RS35m Power Supply Schematic annotated with Notes from QST Hands-On Radio, "Experiment #35—Power Supply Analysis" PDF File
    [ Hits: 8330 | Votes: 30 | Rating: 8.20 ]
Technical Reference : Radio Frequency Interference : BPL Technical Reference : Spectrum Analyzers
  • Simple Spectrum Analyser - Homebrew a simple spectrum analyzer. Diagrams, part list and instructions by G4AON
    [ Hits: 2482 | Votes: 2 | Rating: 7.00 ]
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