wave form

119 links

T2FD, The Forgotten Antenna - The terminated tilted, folded dipole T2FD is a little known antenna that performs excellently. Compact in size compared to a half-wave dipole the T2FD provides signal gain, wide frequency coverage, and exceptionally low noise characteristics.
[ Hits: 4884 | Votes: 3 | Rating: 8.33 ]

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 ]
The quarter wave transformer - A transient analysis of an inpedance transforming device, by W9DMK, in pdf format
[ Hits: 1005 | Votes: 1 | Rating: 1 ]

The full-wave loop antenna - These omnidirectional antennas offer Horizontal polarization, and about 2.1 dbd of gain. They are much quieter than a dipole or a vertical, have a broader bandwidth and will usually out perform a dipole antenna.
[ Hits: 5052 | Votes: 4 | Rating: 6.5 ]

Loop Antenna Design - Full-wave loops are very popular antennas. They are especially useful on 80 and 40 meters where they perform well at modest heights
[ Hits: 2295 | Votes: 1 | Rating: 10 ]

The FD4 (FD3) Windom Antenna ^updated ^pop - The 4-band Fritzel model FD4 is a special version of a Windom antenna. It is a half-wave long on the lowest frequency, and is fed from a coax cable through a transformer inserted in the wire at one-third from one end
[ Hits: 53320 | Votes: 96 | Rating: 5.37 ]

RF HAMDESIGN - An engineering oriented organization specializing in the design and manufacture of high performance parabolic antennas, 3dB high power RF couplers, Antenna power splitters, directional RF couplers and more items for RF transmission from HF through Microwave frequencies.
[ Hits: 1616 | Votes: 5 | Rating: 9 ]

Kiwa Electronics - Kiwa Electronics is a company that specializes in accessory equipment for the radio enthusiast. Our products include Filter Modules to improve receiver performance, a High Performance Medium Wave Air Core Loop Antenna for improved broadcast band reception, the Pocket Loop Antenna, the Earth Monitor, BCB Rejection Filter and Broadband and SW Preamps. We also offer numerous performance upgrades for popular receivers.
[ Hits: 3067 | Votes: 5 | Rating: 8.8 ]

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

Democratic Voice of Burma - Democratic Voice of Burma is a multimedia organization focusing on Burma - Myanmar. We provide impartial news, information and analysis about Burma. We have two hour daily radio broadcast to Burma via short wave, promoting press freedom, democracy and human rights. Our news is available in Burmese, English, Arakan, Chin, Kachin, Karen, Karenni, Kayan, Mon and Shan languages.
[ Hits: 711 | Votes: 1 | Rating: 10 ]

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 ]
Shortwave DX Blog - A blog with loggings and information relating to shortwave pirate radio in Europe.
[ Hits: 1364 | Votes: 2 | Rating: 5 ]

Short Wave Espionage - Here you can access the book "Secret Signals, The Euronumbers Mystery" which was written in 1991 and is now out of print. Lot's of information on spionage and numbers stations
[ Hits: 1706 | Votes: 3 | Rating: 10 ]

Total Recorder - Captures any audio from the Internet, records audio from CD, microphone, line-in, converts any sound formats to WAVE and MP3. Total Recorder records streaming audio, Mic input, Line-in input as well as CDs and DVDs, allows users to schedule any number of future recordings
[ Hits: 7117 | Votes: 22 | Rating: 8.72 ]

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 ]

Cobracom - Oscilloscope, Realtime spectrum analyzer, Impedance meter, RLC bridge and signal generator for Windows. Is a Windows application that converts your PC into a powerful dual-trace signal analyzer (oscilloscope, FFT etc...) . Uses your PC sound card as an Analog-to-Digital a Converter to digitize any input waveform and as Digital-to-analog Converter for the signal generator. True 24 bit adc/dac 48K/96k/192k sampes/sec.
[ Hits: 21552 | Votes: 13 | Rating: 6.23 ]

Bitscope Waveform Generator - Integrated DSP based waveform generator and timing for BitScope. Arbitrary waveforms, synchronized clocks and external triggers.
[ Hits: 10249 | Votes: 37 | Rating: 4.56 ]

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 ]