back fire

High impedance baluns - Introduction with some background on balun types

Eliminating TX RF Feedback Problems - Malfunction of transceivers due to stray RF pickup is a common problem, especially when using end-fed antennas, high-impedance feedlines, or a poor ground counterpoise

AMANDX Dipole - The longwire antenna is a very effective antenna for the listener who wants to cover all of the shortwave bands from 530 KHZ to 30 MHZ.a

HB9DHG QSL gallery - Fully seachable and ordered QSL cards gallery includes front and back of thousands of QSL cards received by HB9DHG

Dallas police live scanner  ^pop - Listen to the Dallas Ambulance, Fire & Police live scanner radio feed

Scanner Chile - Scanner Chile is a System online where you can listen to the Departments of Firemen of the Metropolitan Region Chile

Attleboro - Mass Live Feed - Live feed Attleboro Ma and Cumberland RI, Fire and Police

Calvert County, MD Police and Fire - CalvertNews.info provides news and information for Calvert County, MD. Powered by the Calvert Independent.

Houston area firefighters live feed - Houston FD live dispatch audio and discussion group

Southern Maryland Police & Fire - Southern Maryland (somd) police/fire live scanner feed

Las Vegas Live Scanner  ^pop - Las Vegas, Nevada Police and Fire Live Scanner

Walton county Georgia sheriff and fire scanner - Live Walton County Sheriff, Fire, and EMS Radio

ScanClarke - Georgia Police and Fire - This site allows you to listen to Athens-Clarke County Police and Fire and University of Georgia Police radio communications.

Muscogee Live Police Scanner - This site allows you to listen to Columbus, Georgia Police and Fire Department radio communications

Troup County Sheriff, Fire, and EMS Radio - This site allows you to listen to Troup County, Georgia Sheriff and Fire Department radio communications.

Minnesota - Willmar Police & Fire-EMS Scanner Feed - WILLMAR MN KANDIYOHI CO. Police fire EMS highway dept.

Bucks & Montgomery Live police scanner - Live Police/fire/ems scanner link for Southeastern PA area including Bucks, Montgomery Counties and Philadelphia plus South Jersey area

ICOMM Tele Limited - Largest Capacity of 200,000 MT for Towers & market leader in India with backward integrated rolling & manufacturers of Shelters, V/UHF, Patch Panel Antennas, DIAS & DWDM Equipment

Citizen Weather Observer Program - A private-public partnership with three main goals to collect weather data contributed by citizens; to make these data available for weather services and homeland security; and to provide feedback to the data contributors so that they have the tools to check and improve their data quality

WM2U's PSK31 Page - An interesting article on PSK31, includes informations on interfacing to sound cards, troubleshouting, list of psk31 softwares and some historic backgrounds.

ScanIowa.com - Welcome to Iowa's newest interactive site regarding radio scanners. We have the latest information on listening to police agencies, fire/EMS, severe weather, and much more.

NSW Emergency Service Scanning - Scanning information (frequencies and talkgroups) of the emergency services in NSW, such as the NSW Police Force, NSW Fire Brigades, NSW Rural Fire Service, NSW State Emergency Service and Ambulance Service of NSW.

abc Morse Code for Palm - Palm OS Morse code tutor. Farnsworth support, Flashing backlight support, HUGE font in random free run mode, a cool scrolly bar when listening to QSOs, a handy Morse-to-text-and-back translator / converter, built-in Q code quiz, For Palm OS 3.5 or higher

Morse Code Database eBook - Morse list database by Eric Backus

Negative feedback output circuit - Negative feedback is often referred to as shunt feedback in conjunction with emitter degeneration.