rf reciever

Why active antennas aren't perfect - There have been various comments here regarding the effectiveness of active antennas

Testing EH Antennas - EH antenna tests report by Claudio Re, I1RFQ in pdf format

HF mobile antenna  ^pop - Build your mobile antenna which outperforms Hustler by 10db and ATAS-100 by 18db. From 80 to 10m.

The Carpet Loop - The Carpet Loop II is an inexpensive, easily built, high performance antenna that can work in almost all apartments.

Radiation and scattering - Basic antenna theory, Antenna directivity and effective area, Antenna arrays

The gain of aerials: the myths explained - In the long history of beam aerials there has persistently existed the claim that certain types of aerials perform better than yagis.

Radio Friends DX Group - The official webpage of Radio Friends DX Group

Colorado Dist. 16 ARES - Colorado ARES District 16 is the counties of Pueblo County and Huerfano County.

Nellis Radio Amateur Club - "Located at Nellis Airforce Base-Las Vegas, Nevada USA. Nellis RAC is a progressive radio club. Providing licensing classes, on-air code study group, vhf/uhf repeaters, emergency and public service communications, ""Aviation Nation"" Airshow Special Event Station N7V"

Christian Amateur Radio Fellowship (CARF) - CARF combines the wonderful world of amateur radio with Christian fellowship and service.

9H9SWT SES - "U.S. Swift Boat SailorsßReunion activities, Special Event Radio Amateur Station callsign ""N4S"" will be operating from March 20 to 23, 2003 from the Sheraton Waterside Hotel, Norfolk, Virginia USA."

Leitner Elettronica - RF Amplifiers for HF VHF UHF

Nemal Electronics - Manufacturer of standard and custom electronic cable, connectors, cable assemblies, and patch panels for broadcast, audio, video, RF, microwave, and electronic control applications.

Laipac Technology Inc. - We are committed to constantly improving our solutions in areas of GPS System, GPS Receivers, GPS Antennas, GPS Dataloggers, RF Modules, Wireless Security Systems, Automatic Vehicle Location (AVL) for real time and passive tracking

Marine broadcast - World Wide Marine Radio Facsimile Broadcast Schedules From NOAA, wefax scheduling

50 Mhz Dx & Audio Files - Lage collection of 6 Meters and 2 meters QSOs, recorded in real audio format by OE3MWS

EQSO.ORG - eQSO is a complete dedicated ham radio internet gateway and server system. It is intended for use by RF gateways and PC users connected to the internet

Hidden and stealth antennas  ^pop - Antenna Restrictions, Power Restrictions, RFI Problems, or Limited Space keeping you off the air?

General Aviation Frequencies - General use frequencies

Digital Modes collection - RTTY SSTV PSK31 MFSK MT63 PACKET APRS and more...

iSpectrum Analyzer - Macintosh audio spectrum analyzer that allows the user to view live audio in a standard frequency plot, a stereo oscilloscope view and a waterfall display

2 m. Band VHF PA 5 Watts - A VHF power amplifier made with two cheap RF transistors, 2N3924 as driver and a BFS22A for final stage, giving an unexpected output power of 7-8 watts maximum

Eliminate That QRM - reduce or completely eliminate interference from almost any local source whilst leaving the wanted signal relatively unaffected, even though it may be on the same frequency

Bluetooth Headset with built-in PTT - A Bluetooth Headset Interface with built-in PTT for Amateur Radio by Bertrand Zauhar, VE2ZAZ

Amateur Radio Repeater Controller - The project requirement is to design the interface to the signal channel elements after the receiver and before the transmitter