low band radio

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low band radio

78 links

Antennas : 160M
  • 160m inverted L by W6SDO - A 160 meter antenna with a base loading coil used to tune the two lower frequency segments of the band.
    [ Hits: 1826 | Votes: 3 | Rating: 7.33 ]
Antennas : End-Fed
  • Multi-band End-Fed Antenna - An excellent guide to homebrewing multi band end-fed antennas. The article, embed several drawings including diagrams and detailed pictures, illustrating the basic funcionality of end-fed antennas. The author gives some basic hints on how to build a half size antenna for 80 40 to 10 meters and a 6 meter to 40 meter configuration. It is also well described how to build the impedance transformer and the loading coils for lower bands.
    [ Hits: 1100 | Votes: 6 | Rating: 4.5 ]
Antennas : Tuners
  • Semi-automatic antenna tuner project - Thsi article describes a microcontroller driven semi-automatic antenna tuner capable of handling power levels up to 150 watts. The device is a low pass filter tuner manually tuned by setting the optimized L/C combination by hand and then storing the values into the EEPROM of the mictrocontroller to recall them later (seperately for each band from 80 to 10 meters including WARC bands)
    [ Hits: 291 | Votes: 0 | Rating: 0 ]
Antennas : Vertical
  • The 10/15/20 Meter Trap Vertical Antenna - This antenna project came out very nice. It's a rugged homebrew multi-band trap vertical antenna that works the 10, 15, and 20 meter amateur radio bands. The antenna can be mounted on the ground or on a mast. Mounted on the ground the antenna has a low take off angle for working DX. If mounted on a mast the antenna will acheive both a low angle as well as another radiation lobe that has a much higher take off angle.
    [ Hits: 4152 | Votes: 14 | Rating: 6.08 ]
Manufacturers : Amplifiers
  • R3KBO EB104.ru Amateur Radio Products - R3KBO is an amateur radio club producing and developing amateur radio kits and assembled products including HF VHF Power Amplifiers or RF Power Kits and amplifier parts, low pass filfers, band pass filters, sourge protections, splitters and combiners, antenna switches
    [ Hits: 511 | Votes: 1 | Rating: 10 ]
Operating Modes : HSMM
  • Broadband Hamnet Network - The availability of low-cost, ready made 2 GHz hardware and the project at Broadband Hamnet dot org, make it unthinkable that the amateur radio community NOT take advantage of broadband ad-hod TCP/IP networks!
    [ Hits: 297 | Votes: 1 | Rating: 1 ]
Operating Modes : NBEMS
  • About NBEMS - Narrow Band Emergency Messaging Software (NBEMS) is an Open Source software suite that allows amateur radio operators to reliably send and receive data using nearly any computer (Windows, Mac, and Linux) and any analog radio without requiring a dedicated digital infrastructure or specialized modem hardware
    [ Hits: 311 | Votes: 0 | Rating: 0 ]
Operating Modes : Top Band
  • Low Band DXing from a Small City Lot - Encouragement for Little Pistols, article originally written for and published in SKIP the monthly newsletter of the Fresno Amateur Radio Club
    [ Hits: 556 | Votes: 2 | Rating: 5.5 ]
Radio Equipment : HF Transceivers : Yaesu FT-991
  • FT991 MARS Mod - This modification will expand the tx frequency range of the Yaesu FT-991 from allowing just ham radio bands, to all bands 1.8 - 30MHz and 50-54 MHz.This information is solely for use by licensed members of MARS (Military Affiliate Radio System) or CAP (Civil Air Patrol)
    [ Hits: 917 | Votes: 5 | Rating: 3 ]
Software : Android
  • SDRanywhere - The SDRanywhere application is an Android app that allows remote operation of an RFSPACE SDR-IQ, NetSDR, SDR-IP or Cloud-IQ radio from anywhere in the world. The demodulated audio and waterfall information is compressed and sent to the client application using a low bandwidth internet connection.
    [ Hits: 481 | Votes: 1 | Rating: 10 ]
Software : Antenna analysis
  • Antenna Calculation Software - The program consists of tabbed pages for various antenna and transmission line calculation. You can compute the values for an inverted L network that will allow you to match the 50 ohm output of the radio, or you can compute the necessary length in the units of choice for a 5/8 wave vertical for 10 meter band.
    [ Hits: 434 | Votes: 1 | Rating: 10 ]
Software : Audio Streaming
  • RemAud Remote Audio Software - RemAud is a Voice over IP (VoIP) application primarily designed for two-way amateur radio remote control over the Internet. RemAud uses streaming-audio technology in a client-server architecture. It features high radio sound quality, low latency, low bandwidth and very low CPU usage by DF3CB
    [ Hits: 2406 | Votes: 13 | Rating: 7.85 ]
Software : Logging
  • Call Book Log 3 - A ham radio logging solution. Built on mysql/maria db and php, it allows you to host a log on a web server and have easy access to viewing editing deleting backing up and restoring the log. Allows everyone to view the log and a central admisitrative section which when logged into allows you to add and edit and remove entries. It features an easy to setup page, run the setup page and enter the required values and your set to start logging. It is primarily mobile friendly, easy on bandwidth and should work well in any browser. If entering a contact that you have worked before it will show the last 5 dates and times of that station.
    [ Hits: 858 | Votes: 3 | Rating: 10 ]
Software : Weak Signal
  • WSQCall A Weak Signal QSO mode for LF/MF - Amateur Radio enthusiasts who are interested in the LF and MF bands may be familiar with WSPR and WSJT JT9. Used as a propagation probe or beacon, WSPR allows very weak signals to be detected, frequently as weak as -27dB SNR.
    [ Hits: 186 | Votes: 0 | Rating: 0 ]
Software : iPhone : DX Cluster
  • iDX for iPhone - Free ham radio DX Cluster app for iPhone and iPad based on G7VJR DXlite, allow to easily filter by band, show skimmer or cluster spots, and call-sign search.
    [ Hits: 1236 | Votes: 39 | Rating: 9.35 ]
  • 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 : Receivers : Regenerative Receiver Technical Reference : Software Defined Radio
  • Hermes-Lite Low Cost HF SDR - The Hermes-Lite is a low-cost direct down/up conversion software defined amateur radio HF transceiver based on a broadband modem chip and the Hermes SDR project. It is entirely open source and open hardware, including the tools used for design and fabrication files. Over 300 Hermes-Lite 2.0 units have been successfully built.
    [ Hits: 518 | Votes: 0 | Rating: 0 ]
Technical Reference : Transverters
  • 144MHz to 50MHz receive converter - A simple accessory for a satellite station, that allows using a 6 meter capable radio in conjunction with a typical S-band to 2 meter converter
    [ Hits: 686 | Votes: 1 | Rating: 9 ]
Technical Reference : Vector Network Analyzer
  • miniVNA PRO Modifications - The mini Radio Solutions miniVNA PRO is the only affordable vector network analyser (VNA) I know of that offers remote wireless operation. This is very interesting because it allows to measure the input impedance of HF antennas installed at height without having to deal with coax cable lengths, baluns nor common mode suppression chokes. However, to render the miniVNA PRO truly field proof, it requires a number of significant modifications.
    [ Hits: 136 | Votes: 5 | Rating: 7.8 ]

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