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radio lab

204 links - and 2 categories

Antennas : End-Fed : End Fed Half Wave Antenna
  • End Fed Half-Wave Antennas - An interesting article on end fed half-wave wire antennas with a couple of original experiments. Author illustrate the role of the QRP matchbox, and a 40/20 meter antenna with a center stub making it a large bandwidth antenna for 40 and 20. Includes also an 80/40 end fed with the typical coil to make it available on 80 merts band.
    [ Hits: 287 | Votes: 2 | Rating: 10 ]
  • End Fed Antenna with a 1:64 Matching Network - In this experiment the autor is going to explore the use of a 1:64 matching network on the End Fed Long Wire Antenna. Experiment will consist in build a 80-40-20-15-10 meter End Fed Long Wire Antenna with a 1:64 matching network from the documentation available on the internet
    [ Hits: 863 | Votes: 15 | Rating: 6.73 ]
Manufacturers : Accessories
  • Hands Free - Radcom Labs - The SAFE SPEAK HF3 is the third generation of a unique Hands-Free microphone system for two-way radio communications. The HF3 can be used with almost any radio transceiver and is ideal for permanent installation in a vehicle or temporary use during emergencies or special events.
    [ Hits: 173 | Votes: 1 | Rating: 10 ]
Operating Aids : Maps
  • WW Locator Map of Italy - Amateur radio map of Italy with WW locators, provinces abbreviations and Call sign Prefixes, in a A3 size PDF file free to download, made available by IU3KJL Davide
    [ Hits: 377 | Votes: 4 | Rating: 7.75 ]
Operating Modes : Repeaters
  • Ham Radio: Using Repeaters - The most basic form of repeater receives communication on one frequency and re-transmits at a different frequency. This is known as duplex communication. Repeaters are generally set up to operate with FM modulation on the amateur bands within the VHF (30 MHZ – 300 MHZ) and UHF frequencies (300 MHZ – 3 GHz). These are generally the frequencies used by handheld and mobile devices.
    [ Hits: 92 | Votes: 1 | Rating: 8 ]
Operating Modes : Satellites : Weather Satellite Propagation : Observatories
  • Electronic Ionosonde to Monitor the Ionosphere - This document illustrates the processes carried out for the construction of an ionospheric sensor or ionosonde, from a universal software radio peripheral (USRP), and its programming using GNU-Radio and MATLAB.
    [ Hits: 102 | Votes: 0 | Rating: 0 ]
Radio Equipment : HF Transceivers : Elecraft K3
  • Transforming the Elecraft K3 into a SDR with K3 - This article will explain a few of the ways author use an external SDR and Linrad to enhance his K3 experience. Linrad is one of many available SDR receiver programs. The same could be done with any radio that lets you access its IF frequency output. Article from NCJ Nov Dec 2019
    [ Hits: 336 | Votes: 0 | Rating: 0 ]
Software : Logging
  • DXFile - DXFILE is an advanced log management program for radio amateurs. It allows complete management of amateur traffic and much more. Available only in French. Windows Shareware
    [ Hits: 153 | Votes: 0 | Rating: 0 ]
Software : Radio Control
  • Win4YaesuSuite - Yaesu Radio Control - Win4Yaesu Suite is a commercial software for Yaesu FTDX and FT991 Radios. It includes support for SDRPlay and LPPAN panadapters. It interfaces to all third party hardware and software programs including HRDLogbook, DM780, DXLabsSuite, NAP3, N1MM+ and many more.
    [ Hits: 478 | Votes: 2 | Rating: 7.5 ]
  • Win4IcomSuite ICOM Radio Control Software - The Ultimate Control Software for the IC-7300, IC-7610, IC-7600, IC-7850, IC-7851 and Others is a control software suite that includes additional interesting features such as support for the built in Spectrum Scope, Audio monitors, Shortwave DB, CW Terminal, Clublog Spotting, Memory management, interface to Ham Radio Deluxe Logbook, DM780, n1mm+, log4om, DXLab and other. Runs on Windows OS, commercial licence.
    [ Hits: 361 | Votes: 1 | Rating: 1 ]
  • DDUtil for Flex Radio - Data Decoder Utility is designed to enhance the operating experience for Flex Radio users by providing advanced connectivity to Peripheral equipment and radio control programs (RCPs) otherwise not available.
    [ Hits: 114 | Votes: 0 | Rating: 0 ]
Software : Utilities
  • Free ham radio utilities written in LabVIEW - Free ham radio utilities written in LabVIEW includes Open Wire Calculator, Dipole Peak/Null Angle Calculator, a Coil-Shortened Antenna Calculator ad interesting Round Coil Inductance Calculator and a Skyloop Antenna Calculator
    [ Hits: 294 | Votes: 2 | Rating: 5.5 ]
Software : Weak Signal
  • JTAlert - JTAlert provides several audio and Visual alerts for WSJT-X & JTDX software. JTAlert generate audio and visual alerts for several alert conditions, logs automatically to several ham radio log books software like hrd dxkeeper,log4om, interoperates with web services and it supports dxlab suite.
    [ Hits: 226 | Votes: 1 | Rating: 1 ]
Software : iPhone : DX Cluster
  • DXWatch App for iPhone - This is the official App of the popular DX Web Cluster DXWatch. You can follow amateur radio DX spots trough the world wide DX cluster network filter by band. Available for iPhone and iPad
    [ Hits: 228 | Votes: 0 | Rating: 0 ]
Technical Reference : Components
  • Repair or Replace Electrolytic Capacitors - For low voltage applications, like cathode bypass capacitors, most vintage types have an axial configuration, which is less common today but still available. Electrolytic power supply caps likely constitute the single worst liability in old audio, radio and test equipment. Rap about Electrolytics, Reforming, Chassis-Mount Replacements, Under-Chassis Installation, Rebuilding Capacitors
    [ Hits: 120 | Votes: 1 | Rating: 6 ]
Technical Reference : Keyers
  • Juma Keyer1 - Miniature PIC microcontroller based keyer kit with convenient modes. The kit includes PCB, componets, knob and ready programmed PIC microcontroller. Author make available from his web site Circuit diagram, Component layout,List of components and downloadable Software
    [ Hits: 101 | Votes: 0 | Rating: 0 ]
Technical Reference : Microphones Technical Reference : QRP Projects
  • The Micro20 III Pocket Size SSB RTX for 20m - DK7IH QRP transceiver for 14 MHz. This small and compact home made transceiver with a max power output of 5W, the VFO module is based on the clock oscillator chip Si5351A by Silicon Labs ATmega168 and OLED 1306
    [ Hits: 249 | Votes: 3 | Rating: 10 ]
Technical Reference : RF Safety
  • RF Exposure Evaluating Your Station - How do you practically conduct an RF exposure evaluation of your station? What information do you need and what values must you compute? What are the tools and techniques readily available to the casual operator to ensure compliance with the FCC regulations about RF exposure
    [ Hits: 198 | Votes: 0 | Rating: 0 ]

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