frequency544 links - and 9 categories
- Constructing a LowFER Antenna
- This article describes the antenna for Low Frequency Beacon. It originally appeared in the "Lowdown" for Oct. 1999.
[ Hits: 1336 | Votes: 2 | Rating: 5.50 ]
- Feeding the Beast
- Transferring Radio Frequency Energy from Your Transmitter to Your Antenna by Don Keith N4KC
[ Hits: 391 | Votes: 1 | Rating: 10.00 ]
- NCDXF/IARU Beacon Project
- The NCDXF, in cooperation with the IARU, constructed and operates a worldwide network of high-frequency radio beacons on 14.100, 18.110, 21.150, 24.930, and 28.200 megaHertz. These beacons help both amateur and commercial high-frequency radio users assess the current condition of the ionosphere
[ Hits: 1178 | Votes: 2 | Rating: 7.50 ]
- ITU: Frequency Allocations
- Table of frequency allocations for Amateur and Amateur Satellite Service
[ Hits: 2007 | Votes: 1 | Rating: 2.00 ]
- Star Antenna
- Communication Electronic designs, manufactures and markets antennas for fixed wireless and mobile wireless applications in a wide range of frequency bands.
[ Hits: 295 | Votes: 4 | Rating: 10.00 ]
- Maritime stations on 150 meters band
- 2 MHz Medium Frequency Maritime Stations in PDF format
[ Hits: 800 | Votes: 2 | Rating: 9.50 ]
- Really Low Frequency Operating
- The world below 500 kHz (The wavelength is 1500 meters or just about a mile) has a number of interesting listening and communications opportunities with possibly more to come.
[ Hits: 744 | Votes: 3 | Rating: 5.67 ]
- HF Radio wave propagation
- Radiowave propagation in the medium and high frequency spectrum in DOC format
[ Hits: 754 | Votes: 3 | Rating: 3.33 ]
- Frequency files for VX-150
- Frequency files and software for programmable scanners fro VX-150 and VX-2 yaesu radios
[ Hits: 4371 | Votes: 12 | Rating: 3.16 ]
- Modifications for the Yaesu VX-5R
- VX-5R Loose antenna cure, Vx-5r Free Band, VX 5 R modification for German, VX-5R expanded frequency mod, VX-5R MARS/CAP & freeband mod
[ Hits: 3028 | Votes: 0 | Rating: 0.00 ]
- ICOM IC-2100H Frequency expansion
- Modification to IC-2100H
[ Hits: 1941 | Votes: 2 | Rating: 10.00 ]
- The Radio Reference
- RadioReference.com, scanner frequency and radio communications reference source, with complete conventional frequency assignments, trunked radio system information, frequencies, and talkgroups, FCC License assignments and maps, 10-Code Lists, agency maps, files, downloads, links, and detailed agency information for most public safety, military, and local government activities.
[ Hits: 5641 | Votes: 30 | Rating: 6.89 ]
- The G4PYR MF Coastal Radio Website
- Website dedicated to Coastal Radio Stations, includes frequency lists for memdium frequencies maritime stations
[ Hits: 1609 | Votes: 8 | Rating: 10.00 ]
- Alfa Lima International
- A free radio station that is transmitting world wide on several shortwave frequency 's with loads of pirate and freeradio information.
[ Hits: 1037 | Votes: 2 | Rating: 9.50 ]
- The purpose of the APRS-Beacon is to provide simple APRS-compatible position beacons for up to three Objects. It is designed to 'stand alone' and does not monitor other traffic on the frequency. It can use a single-port TNC (in 'native' mode), a single- or dual-port TNC in Kiss mode or the AGW Packet Engine in order to transmit on up to four radio ports.(When running with AGWPE, APRS-Beacon will also work with Windows 2000)
[ Hits: 3117 | Votes: 5 | Rating: 2.80 ]
- Baudline signal analyzer
- A Linux based FFT spectrum analyzer designed for time-frequency browsing and scientific data visualization. Oscilloscope waveform, statistical histogram, accumulated spectral trace,Weak Signal reception, continuos data logging, FFT Analyzer and specialized measurement windows.
[ Hits: 11897 | Votes: 32 | Rating: 8.85 ]
- LCF Calculator
- LCF online Calculator, calculate relation between Frequency Capacitance Inductance and Reactance
[ Hits: 2270 | Votes: 31 | Rating: 3.87 ]
- Precision Frequency Enthusiasts
- Frequency measurement for beginners, technical terms related to frequency measurement and accuracy, techniques and calibrating procedures.
[ Hits: 629 | Votes: 1 | Rating: 10.00 ]
- Build a logging frequency counter
- Pictures, photos, source code and plans to build a logging frequency counter
[ Hits: 1929 | Votes: 2 | Rating: 2.50 ]
- Safety: RF awarness guidelines
- Although Amateur Radio is basically a safe activity, in recent years there has been considerable discussion and concern about
the possible hazards of electromagnetic radiation (EMR), including both RF energy and power frequency (50-60 Hz) electromagnetic fields. This section summarizes what is now known and offers safety precautions based on the research to date.
[ Hits: 456 | Votes: 0 | Rating: 0.00 ]
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