rf prop

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rf prop

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Antennas : Feed Lines
  • Comparator-based RF switch - This is a concept paper, not a constuction article. There are too many variables to propose a one size fits all design. However, this paper should give you the basic idea how to do it
    [ Hits: 779 | Votes: 1 | Rating: 5 ]
DX Resources : Beacons Operating Modes : Mobile
  • How to wind a choke - How to build and properly wound an efficient RF choke to protect antenna controller in mobile setups
    [ Hits: 432 | Votes: 0 | Rating: 0 ]
Propagation : Aurora
  • Basics of Propagation by ON4SKY - Thierry LOMBRY, ON4SKY, develops in several long articles the bascis of propagation. His website includes also a French section dealing with auroras.
    [ Hits: 1291 | Votes: 1 | Rating: 10 ]
Propagation : Resources
  • G7IZU Radio Reflection Detection Page - Meteor Shower, Aurora, Sporadic-E and Solar Flares detected using Radio Signal Reflection, by Andy Smith, G7IZU. Live waterfall displays from three receivers, live Es propagation maps.
    [ Hits: 804 | Votes: 6 | Rating: 8.33 ]
Shortwave Radio : SWL Resources
  • DX Activities of ONL5183 - Whith more than 20 years of ham practicen SWL Thierry LOMBRY, alias ONL5183, has written several technical pages about ham activities, including propagation, radio perturbations, radioastronomy, DXing, QSLing, ham-spirit, review of material and more. This very interesting website is completed by a large French section devoted to amateur astronomy illustrated with vivid colors pictures.
    [ Hits: 1054 | Votes: 3 | Rating: 6.33 ]
Software : Antenna analysis
  • 4NEC2 antenna modeler  pop - 4nec2 is a completely free Nec2, Nec4 and windows based tool for creating, viewing, optimizing and checking 2D and 3D style antenna geometry structures and generate, display and/or compare near/far-field radiation patterns for both the starting and experienced antenna modeler. Can be interfaced to HFwin32 propagation prediction software.
    [ Hits: 30094 | Votes: 131 | Rating: 7.32 ]
Software : Databases
  • Frequency Manager - Database system with 60000 frequencies, powerfull 3D MUF/LUF-propagtion software and full copntrol of several receivers
    [ Hits: 6528 | Votes: 17 | Rating: 4.65 ]
Software : Legacy Systems
  • ARIDX by UA1AAF - At the moment the most used program is UA1AAF. It is an excellent program written by Boris, UA1AAF, to handle ARI International DX Contest. It can simulate K1EA or N6TR workings; it will be possible to connect the RTX to the computer using a standard interface in such a way as to transmit directly in CW from the keyboard; most of the controls are like K1EA's CT and N6TR's TR ; on line help provides almost all the information necessary for using the program. Is possible to insert QSO after the contest. An appropriate utility in included for conversion in ADIF format. The program is very small and therefore works without any problems on any IBM compatible computer with DOS 3.3 and over or Windows 95/98.
    [ Hits: 1468 | Votes: 4 | Rating: 5.5 ]
Software : Propagation
  • Radio Propagation & Diffraction Calculator - This is a radio frequency propagation calculator for the transmission path between an RF transmitter and a receiver.
    [ Hits: 23597 | Votes: 51 | Rating: 3.82 ]
  • RF prop  pop - RF propagation software
    [ Hits: 41241 | Votes: 156 | Rating: 3.78 ]
  • ACE-HF Propagation Prediction Software - ACE HF Pro, ACE HF Mobile are Radio Frequency (RF) propagation analysis tools designed for military applications. This version allows the user to analyze the entire HF spectrum using a single fixed transmitter location and multiply receive locations. Commercial version.
    [ Hits: 10041 | Votes: 33 | Rating: 6.22 ]
  • HamCAP - A freeware HF propagation prediction tool, that interface the VOACAP tool by Alex VE3NEA
    [ Hits: 10935 | Votes: 14 | Rating: 8.93 ]
Software : RF Coverage Mapping
  • Radio Mobile - Radiomobile is an excellent and very detailed radio path mapping software, vhf uhf propagation predictor. This windows free software is a tool used to predict the performance of a radio system.
    [ Hits: 10574 | Votes: 40 | Rating: 8.53 ]
  • SPLAT! for Windows - This free software is useful for visualizing terrain and performing Longley-Rice path loss and coverage prediction using the Irregular Terrain Model. A Windows port of the Linux-based SPLAT by John Magliacane.
    [ Hits: 9484 | Votes: 42 | Rating: 6.48 ]
Technical Reference : Amplifiers : RF Amplifiers Theory
  • Power Aamps RF voltages - This test circuit is easy to duplicate, and demonstrates the extreme voltages that appear in an amplifier when the load is improper for the amount of drive power applied.
    [ Hits: 772 | Votes: 1 | Rating: 10 ]
Technical Reference : Coax Cables and Connectors
  • RF Coaxial Connectors - RF coax(ial) connectors are a vital link in the radio spectrum. Coax connectors are often used to interface two units such as the antenna to a transmission line, a receiver or a transmitter. The proper choice of a coax connector will facilitate this interface.
    [ Hits: 4329 | Votes: 0 | Rating: 0 ]
Technical Reference : Components : Toroids
  • Ferrite information - Ferrite Toroidal Cores, Magnetic Properties of Ferrite Materials, EMI - RFI Suppression Design Considerations, Ferrite Beads, Ferrites for RFI Ferrite Cores for RFI Suppression by CWS ByteMark
    [ Hits: 13699 | Votes: 4 | Rating: 5 ]
Technical Reference : HF Radios
  • K1TTT Technical Reference - Technical reference about Accessories, Amplifiers, Antennas, Cable and Connectors, Filters, Geography, Grounding, Gunk, Matching Networks, Projects, Propagation Info Radios, RFI/EMI, Rotors, Station Setup, Towers.
    [ Hits: 5149 | Votes: 6 | Rating: 6.33 ]
Technical Reference : Radio Frequency Interference
  • Automotive Interference Problems - Installing mobile radios in your new megabucks car can be a frightening proposition - especially if RF from your rig could damage your shiny new roadster
    [ Hits: 762 | Votes: 1 | Rating: 1 ]

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