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Antennas : Antenna Calculators Antennas : Feed Lines
  • ERP Estimator - Calculate online, ERP in dB and dBi given PWR Frequency Coax lenght and type and antenna type
    [ Hits: 1667 | Votes: 5 | Rating: 3.8 ]
Antennas : Theory
  • Antenna Efficiency - K0BG article con antenna efficiency covering topics like radiation resistance, coil losses and ground losses, other kind of losses. How calculate efficiency and Bandwidth Notes
    [ Hits: 458 | Votes: 0 | Rating: 0 ]
Operating Modes : D-STAR
  • D-Star Call Calculator - Calculate how to set call signs
    [ Hits: 580 | Votes: 1 | Rating: 1 ]
  • D-PRS Message Calculator - This page calculates the necessary GPS message (C1 message on most Icom radios) to use your Icom radio in GPS mode (not GPS-A mode) with D-PRS.
    [ Hits: 348 | Votes: 1 | Rating: 9 ]
Operating Modes : Satellites
  • Calculate azimuth and elevation - Use this online calculator if you need to know your azimuth/elevation relative to a satellite
    [ Hits: 662 | Votes: 3 | Rating: 4.67 ]
Software : Antenna analysis
  • ICNIRPcalc - ICNIRPcalc allows you to calculate safety distances for many know amateur radio antennas with respect to ICNIRP limits by DL9KCE
    [ Hits: 444 | Votes: 1 | Rating: 9 ]
Software : Circuit Design
  • Coil32 - Coil32 is a free coil inductance calculator, that allows to calculate: single layer and multi layer air core coils, toroidal air core coils, inductors on ferrite rings, in pot core, flat coils on the PCB, and also LC resonance parameters. The program have additional plugins to calculate another kinds of coils. The application is free for usage and distributing.
    [ Hits: 1571 | Votes: 6 | Rating: 7 ]
Software : Propagation
  • BeamFinder - BeamFinder is a software tool designed to conduct analyses for radio amateurs interested in radio propagation studies. It provides a large 2500 x 1800 pixel screen map of the world which displays calculated results from sophisticated models, dx data and other sources of information
    [ Hits: 2453 | Votes: 1 | Rating: 10 ]
Software : iPhone
  • Friis-It NF for iPhone - Friis-It NF is the first iPhone OS based application that allows you to calculate noise figure, system sensitivity, and cascaded gain for an RF Receiver system
    [ Hits: 629 | Votes: 1 | Rating: 10 ]
Technical Reference : Attenuators
  • RF Attenuator Calculator - This is an on-line rf attenuator calculator provided free in order to promote the FLEXI-BOX. Calculates the resistor values, attenuation, minimum attenuation, impedance, reflection coefficient, VSWR and return loss of a matching Pi attenuator
    [ Hits: 467 | Votes: 4 | Rating: 5.25 ]
Technical Reference : Calculators
  • Coil Inductance Calculator - Calculate the inductance of a single-layer, air-core coil.
    [ Hits: 4530 | Votes: 24 | Rating: 5.3 ]
Technical Reference : Coax Cables and Connectors
  • Loss Calculator - Calculate power loss depending on coax cable you use
    [ Hits: 1421 | Votes: 2 | Rating: 7.5 ]
Technical Reference : Components
  • Accurate Inductance Calculator - This page allows you to calculate in the most accurate way high-Q inductor coils.
    [ Hits: 1154 | Votes: 3 | Rating: 6.33 ]
Technical Reference : RF Safety
  • RF Safety Compliance Calculator - This program is intended for far-field calculations, Calculate Estimated Power Density based on several factors.
    [ Hits: 509 | Votes: 3 | Rating: 5 ]

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