rf power transmission

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

How To Make A Homebrew 4:1 Balun  ^pop - I built a homebrew 75 meter Double Extended Zepp Antenna, And I needed a 4:1 Balun So I decided to Homebrew the Balun also. Here is how I did it!

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

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

Integrated Publishing Basics - Radio wave propagation, Principles of transmission lines, Antennas

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.

Transmission1 - Radio Resources for PMR 446, Scanning, Broadcast and CB Radio

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

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."

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

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

Transmitter hunting - Locating or finding radio transmission sources or hidden radio transmitters is known as transmitter hunting.

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

Difona Communication GmbH - Transceivers, anntennas, PA, power supplies, accessories from Kenwood, ICOM, Yaesu, MFJ, ACOM, DAIWA, Diamond, DXSR, Alinco, Ameritron, ETM, Fritzel, UKW Technik, AOR, Bencher, Create, G.B., Heil, Hotline, Maldol, Tonna, Titanex, Outbacker, Hy-Gain, Mirage, SCS, SGC, SSB Elektronik

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

Six Meter Heliax Duplexer Construction - Duplexer capable of handling a high power 500khz split six meter repeater.

Radio QRP - The Art of Low Power - QRP is The Art of Low Power Radio where the challenge is to operate and/or build AM radio transmitters usinga bare minimum of components, money and construction skill.

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

Z Match for Higher Power - Single coil Z match witch handles the power of the linear amplifier