channel pass

CQDX11.com - CB radio Communications on eleven metre CB channels and freeband including information on Citizens Band radio models.

UHF CB Australia - UHFCB.com.au is Australia's leading online CB radio resource, with News & Events, Repeater Locations, Channel Allocations & Information, CB History, Forum, Radio Sales & much more.

DXXE - The DXXE Group was created in January 2005 by Mexican radio amateurs that share a passion for DX, contests, expeditions and island activations.

Marine VHF Radio Live Streaming Audio  ^updated - Live streaming audio of VHF marine radio channels 05A, 16, and 22A from Manasquan, NJ.

Police Scanner Munster Indiana - Live broadcast from Munster Indiana

Newcastle Scan, Live Scanner - A live stream of radio scanner, You will Emergency Services, Police, Fire, Ambulance, Rescue, Transit officers, plus non ES like transport, media, taxis, couriers, buses, security just about anything. From Newcastle Australia

Chicago Police Scanner live - Police radio scanner live streaming broadcast using ustream.tv

F9FT - AFT Antennas  ^updated - The radio-amateur antennas made by AFT (formerly Antennes Tonna, later Tonna Electronique division Antennes) are the result of more than 50 years of passion and experiments. Maker of VHF and UHF antennas, cover bands from 6 meters to 13 centimeters

Tecom - Tecom industries product line encompasses a wide range of highly sensitive active and passive antennas for use in airborne and ground applications, providing complete coverage of the 20 MHz to 40 GHz frequency range.

TIM-CO - authorized distributor of electronic components; connectors - commercial and military, passive and electro mechanical components, RF-coax cable assemblies

NorComm Data Signaling - Sequential Decoders, DTMF, voice encryption, notch filters and band pass filters, single tone burst decoders.

AntennaCompass Station Bearings - Antennacompass.com will calculate the distance and bearing for Ham, TV, FM, AM, and Shortwave stations and plot it on a compass like display.

Jameco - Jameco carries over 50,000 semiconductors, passives, interconnects, electromechanical, power supplies, LEDs and other popular electronic component

DSTAR SWITCH - n open collaborated project for creating base libraries and applications to allow the passing of information from the host computer to the D-STAR radio and vice versa.

Omicron filter design - Electronic filter design software by omicron is the best for developing active filter, passive filter, and digital filter - check out our products and ordering information.

FilterCAD - A free computer aided design program to help users without special expertise in filter design to create filters using Linear Technology's monolithic filter ICs. With FilterCAD, you can design lowpass, highpass, bandpass and notch filters

AADE Filter Design - Freeware windows programs to design Butterworth, Chebyshev, Elliptic (Caur), Bessel, Legendre and Linear Phase low-pass, high-pass, band-Pass, and band-reject filters. Coupled Resonator band-pass filters

Tone Sound Frequency Sweep Generator - Generating of up to eight independent oscillatory processes per each channel with separate frequency, initial phase and amplitude controls.

Spectrum Analyzer Real-time FFT - Eight-channel Audio Spectrum Analyzer is a set of Real-Time Multi-Channel Gauges for investigation of data accepted from any ADC you will want or 16-, 24- and 32-bit ADC of sound card. WDM drivers support. FFT Spectrum Analysis, OscilloScope, Frequency counter, AC/DC voltmeter, Signal-to-Noise Ratio, Signal-to-Noise and Distortion, Spurious-Free Dynamic Range, Effective Number Of Bits, Total Harmonic Distortion, Inter-Modulation Distortion, Phase Shift. Special modes of dual-channel FFT spectral analysis: Separate channels spectra, Spectra of digital sum, difference, product of two signals, Spectrum of digital product of original signal and its fundamental, Spectrum of Real and Complex Transfer Function, Cross Spectrum. Standart weighing of spectra according IEC and CCIR. Oscilloscope modes (for dual-channel ADC) are: original signals, sum, difference, dependence of one channel on another, amplitude distribution of input signals.

5th order High Pass VHF Filter - Sometimes many VHF-UHF modern transceivers have problems with BROADCAST Interference and CROSS-modulation from FM commercial broadcast stations this article shows a simple Batteworth HI-Pass VHF Filter to reduce this problem

Low Pass Filter Construction - Low Pass Filter Module Construction Manual

Low Pass Filters - Article explaining electronic network of low pass filters

Low-Pass Active Filter Designer - Javascript filter design page with introduction to low pass filters by k7mem

High-Pass Filter Design - Online high pass filter design page with introduction to high-pass filters by K7MEM

80m Passive Heterodyne Receiver - Using a full-size antenna and a reasonably sensitive headphone, this simple switching mixer will produce an amazing abundance of signals on 80m.