phase detector

DXanTech.com - HB9CV based dual feed phased array type antennas for HAMs, antenna resource for DX-ers

4 Square Vertical Phased Array - Improve your 80 and 160 meter signal without a Yagi!

Phased Arrays - Phased arrays of short vertical antennas, pdf file

K4TR Antennas - K4TR Manufacture and sell simple dipoles, half square 2 wire phased vertical arrays, end fed zepp antennas, G5RV antennas. 1:1 baluns

Poly Phaser - Data, RF, video protectors coax combiner protectors, grounding Items

PolyPhaser - Technical experts in RF path protection

American Technical Resources - Heavy Duty Surge Suppressors, telecommunications protection, industrial twist lock enabled equipment all voltage, phase and frequency ranges

JWM Engineering Group - Top quality Microwave Phase Locked oscillators for DB6NT, DEMI and homebrew microwave transverters, and other support products.

Counter Surveillance - Field Strength Meter - The zap checker is a counter surveillance, bug detector, field strength meter

Moon Calendar - Current moon phase and monthly moon calendar

Domino - Domino is the name given by the developers to a family of IFK coded coherent phase single tone MFSK keyed modes, using sequential tone-pairs in two alternate fields arranged as orthogonal but interleaved tone sets.

Antenna Noise and Signal Cancelling at LF - The fact that the phasing between a wanted signal and an unwanted signal can be different on different antennas is put to advantage. With this condition, the unwanted signal can be cancelled out by controlling amplitude and phase. The heart of the system is some form of phase control circuitry.

Introduction to MFSK and the MFSK16 - A new weak signal DX mode for Radio Amateurs, employing M-ary FSK, phase continous tones and convolutional coded FEC.

How to build a simple wireless telegraph set - The simplest wireless telegraph set consists of a means of generating and controlling a spark which sends out radio waves into the air, and a receiver or detector to detect the radio waves.

AA9CC Web Page - A few foxhunt reports, a phased array antenna plotting program and some cool links.

Italtras - Power transformers for electronic, toroidals,three-phases

Alabama radio - Eastern Alabama's dealer of amateur radios and antennas, CB radios and antennas, scanners, radar detectors, power supplies, and other related accessories.

GI Joe's radio electronics Priority listing - Dealer for Cb radios, Cb antenna & accessories Galaxy radio, Cobra cb radio, Ranger, Texas Star, Palomar. Police scanner, radar detector, GPS, GMRS, FRS, Wilson cellular amplifier & antennas. Owners manuals, schematics and links.

Go4Electronics.com - CB Radios, Scanners, Radar Detectors, Two Way Radios/GPS store. Products you can trust Cobra, Uniden, Garmin, Rocky Mountain, Whistler and more. We are your specialty store for your mobile communication needs. Based in Tampa Florida.

EMF Safety Superstore - The Ultimate Source for Electromagnetic Pollution Detectors, Shielding Devices and Protection Information

Phase 3D (AO-40) Decoder - This program demodulates the telemetry data signal transmitted by the AO-40 satellite (aka Phase III-D) using the PC sound card

PLL2 - 2nd Order phase locked loop design for passive and active circuits. Bode plot, step response, design parameters

Audio Spectrum Analyzer - OscilloMeter  ^pop - Audio Spectrum Analyzer for Real-time, FFT, OscilloScope, Frequency counter, voltmeter, noise and distortion meter, phase shift meter. Multi-Tone Sound Frequency Sweep Generator. White, pink noise.

Antenna Noise and Signal Cancelling at LF - By using the signals from two antennas, controlling their relative amplitudes and controlling the phase of one of them, unwanted signal or unwanted noise can be phased out. Circuitry is described which uses the signal from a wire antenna to provide selective cancelling against the signal output from an LF loop antenna.

QRM and noise reduction Priority listing - You will find on these pages my experiences and results on antennas and local/non-local QRM/noise reduction. Using a broadband vertical active magnetic loop and a home made / designed broadband amplifier. Two vertical magnetic Alford loops are used in an array. Analog and Digital Signal Processing and a dual phase coherent Software Defined Radio (SDR) are used. By PA0SIM