ros mode

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ros mode

23 links

Antennas : Feed Lines : Choke
  • Common-mode chokes - Chart that present results of impedance measurements made on a variety of common-mode choke implementations across the frequency range 1MHz to 30MHz by G3TXQ
    [ Hits: 605 | Votes: 2 | Rating: 4 ]
  • RF Chokes - A chart presenting the results of impedance measurements made on a variety of common-mode choke implementations across the frequency range 1MHz to 30MHz by G3TXQ
    [ Hits: 905 | Votes: 2 | Rating: 7.5 ]
  • Do not wind chokes on red toroids! - I happened to stumble across some antenna projects showing common mode chokes 1:1 baluns made of some turns of coax wound on T200-2 iron powder toroids.
    [ Hits: 187 | Votes: 0 | Rating: 0 ]
Antennas : G5RV
  • G5RV multi-band antenna - Multi-band centre-fed antenna capable of very efficient operation on all HF bands, specifically designed with dimensions which allow it to be installed in gardens and other open spaces which accommodate a reasonably-straight run of 31.1m (102 ft) for the flat-top standard model.
    [ Hits: 7302 | Votes: 8 | Rating: 7.38 ]
Internet and Radio : Mailing Lists
  • Ten-Tec516 - Site for owners & prospective owners of the Ten-Tec Model 516 Argonaut V Amateur Radio Transceiver.
    [ Hits: 769 | Votes: 1 | Rating: 1 ]
Internet and Radio : Sounds
  • Radio Audio and sound files - Some tens of very special audio files recorded during amateur radio activities like aurora traffic, meteor scatter, communications with ISS crew and the sound of various transmission modes that you can hear on HF and VHF bands
    [ Hits: 8452 | Votes: 12 | Rating: 5.08 ]
Propagation : Long-Delayed Echoes
  • Generation of Long-Delay Echoes - Different theory models to explain generation of long delayed radio echoes by D. B. Muldrew
    [ Hits: 304 | Votes: 0 | Rating: 0 ]
Software : APRS
  • APRS Messenger program - APRS over digimodes including PSK, QPSK and GMSK with digipeating and two way HF internet gateway to the APRS-IS
    [ Hits: 1652 | Votes: 6 | Rating: 9.17 ]
Software : Antenna analysis
  • ASAP - Antenna Scatterers Analysis Program, is a Free general purpose antenna analysis software program for numerical electromagnetic antenna design, modeling and analysis. Source code and windows executables are available to download.
    [ Hits: 14466 | Votes: 9 | Rating: 6 ]
Software : DSP
  • ROS ham radio modem - ROS Multimode software for Ham Radio Operators
    [ Hits: 1784 | Votes: 6 | Rating: 8 ]
Software : Digital SSTV
  • JMSK - JMSK is a software modem that implements a good coherent MSK demodulator that has performance comparable to BPSK. Signals are demodulated from the soundcard. Modulated signals can be routed through the soundcard or to an external device such as a DDS module for direct RF modulation. The advantage of MSK compared to PSK is that non linear amplifiers can be used and has a faster roll off. It is an open source cross-platform program written in C++ Qt.
    [ Hits: 370 | Votes: 2 | Rating: 5.5 ]
Software : Grid Bearing and Maps
  • HamCalc - Add-in module to Microsoft Excel, contains a set of radio amateur relevant special functions: DistSphericLocator(Loc1; Loc2) Calculates the spheric earth model distance between two locators [km] DirSphericLocator(Loc1; Loc2) Calculates the spheric earth model direction from Loc1 to Loc2
    [ Hits: 2242 | Votes: 3 | Rating: 3.67 ]
Software : PSK31
  • AirLink Express - AirLink Express is a user friendly digital mode software package for the Amateur Radio Operator. The software is compatible with Microsoft Windows XP and Microsoft Windows Vista. It offers PSK, MFSK and RTTY digital modes with logging and macro capabilities. If you have ever used the Digipan software you will be immediately familiar with Airlink Express. The user interface is almost identical by Alex Krist, KR1ST
    [ Hits: 8324 | Votes: 23 | Rating: 7.47 ]
Software : Packet
  • AGW Packet Driver - SV2AGW packet radio driver, runs TCP/IP protocol over radio, support windows and several devices like baycom and, E5DXL 9600 G3RUH compatible modems, DRSI and Sound cards by SV2AGW George Rossopoulos.
    [ Hits: 13757 | Votes: 29 | Rating: 4.59 ]
Software : Spectrum analyzers
  • Spectrum Analyzer Real-time FFT - Eight-channel Audio Spectrum Analyzer is a set of Real-Time Multi-Channel Gauges for investigation of data accepted from any ADC you will want or 16-, 24- and 32-bit ADC of sound card. WDM drivers support. FFT Spectrum Analysis, OscilloScope, Frequency counter, AC/DC voltmeter, Signal-to-Noise Ratio, Signal-to-Noise and Distortion, Spurious-Free Dynamic Range, Effective Number Of Bits, Total Harmonic Distortion, Inter-Modulation Distortion, Phase Shift. Special modes of dual-channel FFT spectral analysis: Separate channels spectra, Spectra of digital sum, difference, product of two signals, Spectrum of digital product of original signal and its fundamental, Spectrum of Real and Complex Transfer Function, Cross Spectrum. Standart weighing of spectra according IEC and CCIR. Oscilloscope modes (for dual-channel ADC) are: original signals, sum, difference, dependence of one channel on another, amplitude distribution of input signals.
    [ Hits: 11313 | Votes: 9 | Rating: 7.77 ]
Software : Voice Keyer
  • AAVoice digital voice processor - "Digital voice processor for amateur radio operators. It use prepared ""wav""-files for transmition. Can work in the beacon mode. Optionally you can use simple circuit for PTT-control. It has a lot macros for tramsmitting. Can cooperate with RZ4AG AALog logger."
    [ Hits: 6133 | Votes: 133 | Rating: 5.5 ]
Software : Weak Signal
  • VARA - VARA HF is a soundcard modem that can be found on the HF bands exchanging traffic (Winlink). VARA implements an High Speed Data Mode and comes in 2 separate programs VARA FM and VARA HF. VARA is a High Performance HF modem based on OFDM modulation. VARA Modem, brings state of the art Military grade technology to new and existing HF data. Introduces a new standard of technology available for Amateur and Commercial use. Designed for operation within a SSB Bandwidth of 2400 Hz.
    [ Hits: 103 | Votes: 1 | Rating: 10 ]
Technical Reference : CB Radios
  • Ham International CB Radios - Retrospective of a mark now disappeared. Jumbo, Multimode, Concorde, Puma, Viking. Photographs, diagrams, adjustments etc.
    [ Hits: 10404 | Votes: 137 | Rating: 8.16 ]
Technical Reference : Filters
  • 5th order High Pass VHF Filter - Sometimes many VHF-UHF modern transceivers have problems with BROADCAST Interference and CROSS-modulation from FM commercial broadcast stations this article shows a simple Batteworth HI-Pass VHF Filter to reduce this problem
    [ Hits: 1209 | Votes: 8 | Rating: 6.12 ]
Technical Reference : Power Supply

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