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astro

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Antennas : Moxon
  • 2m Band Moxon - Moxon is a rectangle shaped directional antenna, originally designed by Les Moxon G6XN. There are couple of advantages of using this antenna. It is small in size, Easy to mast, Balanced to 50 Ohms, Near 1:1 SWR, Excellent Front to Back (F/B) ratio, Large bandwidth
    [ Hits: 583 | Votes: 1 | Rating: 6 ]
Antennas : NVIS
  • Portable NVIS Loop for 80m to 40m - A portable (15.5 foot diameter) NVIS loop for 3.5 to 7.3 MHz. Performs well at high and low takeoff angles, and has smaller footprint than most NVIS antennas.
    [ Hits: 363 | Votes: 0 | Rating: 0 ]
Antennas : Towers
  • How setup the antenna tower - A multiple page article about assembling the antenna system, this section includes informations on constructing of the concrete tower base, starting from setting up correctly the foundations in relation to the antenna height.
    [ Hits: 220 | Votes: 1 | Rating: 8 ]
DX Resources : Callsigns
  • HamBrasil - Cadastro de Radioamadores Brasileiros, call sign database for Brazilian stations
    [ Hits: 363 | Votes: 0 | Rating: 0 ]
Ham Radio : Regional : India
  • IndiaHamS.com - Ham Radio India Website, Amateur Radio in Disaster and Emergency Communication,Amateur Astronomy,Ham Radio Lives
    [ Hits: 279 | Votes: 3 | Rating: 9.33 ]
Manufacturers : Microwave
  • Valon Technology - Valon Technology designs and manufacturers low cost, reliable radio frequency products such as RF Synthesizer modules, RF Frequency Dividers and Phase Gain Detectors. Main markets are military/defense, test engineering, radio astronomy, research centers and universities
    [ Hits: 287 | Votes: 0 | Rating: 0 ]
Operating Modes : Digital Voice
  • Digital Radio Mondiale - About DRM, the DRM standard, emission types, upfrading your old HF RX to DRM
    [ Hits: 691 | Votes: 2 | Rating: 1 ]
Operating Modes : Ham Radio Balloons
  • NearSys - NearSys (Near Space Systems) is a multifaceted organization, with interests in near space exploration, microcontrollers, robotics, space, and astronomy. Includes a section dedicsated to Amateur Radio High Altitude Ballooning
    [ Hits: 180 | Votes: 1 | Rating: 10 ]
Operating Modes : Meteors
  • Virgo - Meteorscatter app - Virgo is originally designed to serve for meteorscatter propagation purposes in amateur radio. Maintained by Bastian, DB1BM, and Alexander, DL8AAU. Virgo is a projection of the sky visible at your location. Different to other astronomical sky views, there are no stars displayed, but the radiants of current meteor showers.
    [ Hits: 149 | Votes: 0 | Rating: 0 ]
Operating Modes : Portable Operations
  • Equipment for portable HF operations - An excellent and comprehensive article on portable HF operations with attention on selecting proper equipment
    [ Hits: 455 | Votes: 0 | Rating: 0 ]
Operating Modes : WEFAX
  • Amateur Weather Station - A page describing all element of a weather statio for NOAA weather satellite image reception
    [ Hits: 512 | Votes: 0 | Rating: 0 ]
Propagation : Sunspots
  • About Smoothed Sunspot Number - The short history of the SSN Smoothed Sunspot Number at Luxorion
    [ Hits: 426 | Votes: 0 | Rating: 0 ]
  • Daily Sunspots groups - All daily drawings of the sunspot groups and USSPS produced by INAF - Catania Astrophysical Observatory from 2009 up today are available in this page. The drawings of sunspot groups and pores are maken by a Cooke refractor (150mm/2230 mm) on a 24.5 cm diameter projected image of the Sun.
    [ Hits: 80 | Votes: 0 | Rating: 0 ]
Shopping and Services : Regional : Europe : Spain
  • Astro Radio - Amateur radio shop in Barcelona Spain
    [ Hits: 1055 | Votes: 0 | Rating: 0 ]
Software : Software Defined Radio
  • WinradHD - HDSDR is a free SDR (Software Defined Radio) application for Windows. Common usage is Radio listening, Ham Radio, SWL, Radio Astronomy, NDB-hunting and Spectrum analysis. HDSDR (former WinradHD) is an advanced version of Winrad, written by Alberto di Bene I2PHD
    [ Hits: 3653 | Votes: 9 | Rating: 7.22 ]
Technical Reference : Amplifiers
  • How to select a tube HF amplifier - Excellent article and guide to choose the best RF power amplifier that fit your needs by ON4SKY
    [ Hits: 714 | Votes: 1 | Rating: 10 ]
Technical Reference : Power Supply
  • Astron Power Supplies Mods - Technical and modification information on Astron Power Supplies compiled from a number of different sources by Mike Morris WA6ILQ
    [ Hits: 1756 | Votes: 2 | Rating: 10 ]
  • Fix the Astron Power Supply Amp Meter - How fix Astron 70 model number VS-70M amp meter not working
    [ Hits: 373 | Votes: 0 | Rating: 0 ]

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