wave

956 links - and 29 categories

SWR: Maximum allowable VSWR - VSWR (voltage-standing-wave-ratio) represents the degree with which an antenna is "matched" to the system impedance. Most modern antennas do not require any tuning for optimum performance. VSWR is one of the easiest parameters to measure and VSWR meters are becoming very popular antenna installation tools
[ Hits: 1240 | Votes: 3 | Rating: 3.33 ]
Setting the SWR of Your Antenna - SWR (standing wave ratio), is a measurement of how efficiently your antenna system will radiate the power available from your radio. In simple terms, your radio would like to radiate all of its power, but can only do so if the other components cooperate
[ Hits: 1253 | Votes: 0 | Rating: 0 ]
The quarter wave transformer - A transient analysis of an inpedance transforming device, by W9DMK, in pdf format
[ Hits: 1005 | Votes: 1 | Rating: 1 ]

Wireman-J-Poles for 2m-40m ^pop - J-Poles with Wireman-cables for the quarterwave matching section, working on VHF and HF bands
[ Hits: 27083 | Votes: 252 | Rating: 8.37 ]

Antennas for 136kHz - A very long and exaustive documentation on building antennas for 136 khz. Includes links to antenna design software for longwave
[ Hits: 4786 | Votes: 4 | Rating: 8 ]

Home Brew VHF UHF dual band antenna ^pop - Contructing precedure and tune up of a dual band mobile antenna. This antenna is just a 1/4 wavelength resonator for both UHF and VHF band. It provides no GAIN as compared to other multi-section design.
[ Hits: 36844 | Votes: 38 | Rating: 4.36 ]

Understanding Standing Wave Ratios SWR - We worry a lot about Standing Wave Ratio (SWR) in amateur radio since SWR is one indication of how well our antenna system is working. Most HF transceivers and antenna tuners have built in SWR meters. SWR is a measure of a transceiver' s output power verses the portion of that power reflected by the antenna system
[ Hits: 8719 | Votes: 8 | Rating: 4.75 ]

VHF/UHF Yagi Antenna Design ^pop - Design your VHF UHF Yagi antenna online, a JavaScript enhanced web page that implements the design of an antenna for 2m and 70cm bands. This page offers a streamlined experience for Yagi antenna design enthusiasts. It assumes prior knowledge of Yagi design principles, minimizing distractions with a user-friendly interface. Equipped with essential equations, it provides instant design feedback. Red font warnings indicate design limitations, ensuring practical results. Constraints include Gain (11.8-21.6 dBd) and Boom Length (2.2-39 wavelengths), with additional frequency-dependent restrictions noted in input fields.
[ Hits: 147433 | Votes: 1105 | Rating: 6.95 ]

Live online streaming for arizona - Listen to original audio content from Flagstaff, Coconino County and Northern Arizona. Streaming Police scanner by azradiowaves.net
[ Hits: 3132 | Votes: 13 | Rating: 4.7 ]

CAP Wireless Amplifiers - Design and manufacture application specific microwave and RF amplifiers, upconverters, downconverters and multifunction assemblies.
[ Hits: 787 | Votes: 4 | Rating: 7 ]

How Radio Works - Excellent slides explaining radio and radiowaves generation basics
[ Hits: 1734 | Votes: 4 | Rating: 9.75 ]

HF Radio wave propagation - Radiowave propagation in the medium and high frequency spectrum in DOC format
[ Hits: 954 | Votes: 3 | Rating: 3.33 ]

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: 1203 | Votes: 2 | Rating: 9.5 ]

SWR Calculator - Computes the Standing Wave Ratio, given the power readings on a line.
[ Hits: 2031 | Votes: 16 | Rating: 5 ]

DSPBOX - DOS Freeware, DSPBOX is an attempt to code the Texas Instruments DSK 'C50 in such a way to make it behave like a commercial DSP noise reduction unit, like the NIR-12, the TimeWave 599+ and others. Not only the noise reduction function has been implemented, but automatic notch, AGC and Band Pass have as well.
[ Hits: 2401 | Votes: 0 | Rating: 0 ]

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: 12378 | Votes: 32 | Rating: 8.85 ]

MorseGen v1.2 - MorseGen converts text into a WAVE file of Morse code. The Tone and Speed are adjustable and the WAVE file can be repeated at a pre-set interval allowing it to be used as a CW Ident for amateur radio applications which require it.
[ Hits: 2553 | Votes: 6 | Rating: 7 ]

GNU Radio - GNU FSF Project - GNU Radio is a collection of software that when combined with minimal hardware, allows the construction of radios where the actual waveforms transmitted and received are defined by software
[ Hits: 3813 | Votes: 2 | Rating: 7 ]

SpectraScope - SpectraScope is a simple Windows interface program allowing your computer to view up to two audio waveforms in either the time or frequency domain. The program is a Windows soft panel operating as a dual channel oscilloscope and spectrum analyzer. The useful frequency of operation is 20 to 10,000 Hz in the time domain and 20 to 20,000 Hz in the frequency domain. The program uses the computer sound card to capture the audio input.
[ Hits: 10806 | Votes: 3 | Rating: 7 ]

Audio spectrum analyzer ^pop - Analyzes audio from 10 Hz to 20 kHz, input from microphone or wave file, Variable sample rates (8000 Hz, 11025 Hz, 22050 Hz, 44100 Hz) Variable transform sizes (1k, 2k, 4k, 8k) Upper and lower limits adjustable Continuous, averaged, peak hold
[ Hits: 30295 | Votes: 54 | Rating: 3.82 ]