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Echos of USAF (Formally NAVSPASUR) radar signals reflected off of meteor trails received at Roswell, New Mexico

Australia, Sydney Fire information and monitoring website, Live sydney radio fire stream.

Live streaming audio of the K7ICU repeater

Germany's International Broadcasting Station with links to numerous pages in multiple languages containing program schedules, and live audio feeds.

The 23 cm amplifier pictured here delivers more than 300 watts with 10 watts drive.

Rutherford County Sheriff and Fire Live Scanner Audio Feed on RadioReference.com

Live streaming audio from Redding police, Redding fire, hospitals, ambulances, Fish and Game, Anderson police, search & rescue, CHP, and fire districts. Redding Californa.

Blackford and surrounding counties Police, Fire, EMS, and EMA.

EchoLink and IRLP Internet Radio Linking Project Node's, Hurricane Watch Audio Feed's and Info, Live Scanner/Other Feed's from the USA, Local Ham Frequencies, Online Receiver's, Shoutcast Live Audio Feed's from the USA, Southern California Frequencies and more

Live dx spots using a world map and google map interface by 5B5WN

DarkIce is a live audio streamer. It records audio from an audio interface (e.g. sound card), encodes it and sends it to a streaming server. Works on Linux and MacOSX

Live Fire Radio Streams From Maryland, Delaware, PA.

Listen to the Baltimore City Police radio feed, carries all of the police districts in Baltimore City (BPD)

The grounded half loop describe in this article is basically a half wave length wire on 80 Meters. The 80M grounded half loop antenna, inspired by a 1984 QST article by SM0AQW, is a compact solution for limited spaces. Comprising a 127-foot wire fed against ground and supported by radials, it balances performance and practicality. Despite compromises in length and proximity to structures, the antenna delivers strong signal reports and effective multi-band tuning using an SGC 237 antenna coupler. Ideal for CW operation, it offers low SWR on 80-10M, though noise levels and safety considerations warrant attention. This versatile design excels in constrained environments.

This article compares two commercial vertical antennas for the 4-meter amateur radio band: the Watson WVB-70 half-wave and the Sirio CX4-71. The Watson measures 2.03m in length, costs around £40, and exhibited adequate performance but required additional waterproofing after rain affected its VSWR readings. The longer Sirio CX4-71 (3.02m) performed noticeably better, delivering signals approximately 2 S-points stronger than the Watson. The Sirio demonstrated high build quality, a stable 1.2-1.4:1 VSWR, and weather resilience, though minor VSWR fluctuations were observed during rain and frost. Both antennas are half-wave designs requiring no ground plane radials.

Review by Clive Davies, G4FV

This document details the design and construction of the PA70H, a 50-watt RF amplifier for the 70MHz (4-meter) amateur radio band. Built around the Mitsubishi RD70HVF1 MOSFET transistor, the amplifier delivers 45-55W output with 3-5W input power while operating on 13.8V DC at approximately 7-8A. The PCB design incorporates multiple protection circuits including overcurrent, SWR, and temperature control. The amplifier features various control modes including GND PTT, +13.8V PTT, and RF VOX. Two versions are available: PA70HLI (requiring 100mW input with additional driver) and PA70H (for 3-5W input). The comprehensive documentation includes circuit diagrams, assembly instructions, and performance data showing successful operation from both 100mW and 3.5W input sources.

CommCat Mobile is a free integrated spot management, remote radio control, and logging app for the iPhone. CommCat is required for remote control.

Live Fire/EMS feed from Eastern King County, WA as dispatched by Eastside Communications

This site serves a community of volunteer and paid professionals in Search & Rescue and Civil Air Patrol who save lives and Amateur Radio enthusiasts who use DF skills as a hobby. We provide antennas and other resources for people in these fields.

FREE ham radio newsletter The K9YA Telegraph is in full-color and delivered to your computer each month as a PDF.

Community blog at livrjournal

Columbus Police Dispatch - Citywide Live Audio Feed

Carteret County NC Public Safety Live Scanner Audio Feed

Hose Company 1 East Rockaway Fire Department Official Page. Scanning FDNY & East Rockaway Fire

Listen to Missouri State Highway Patrol live scanner

Rail Radio Communication Feeds broadcasted from all over the United States and beyond.

Beginners guide and introduction to get started in ham radio if you live in India

Long Beach Los Angeles county live scanner feed

Manufacturer & distributor of vacuum tubes for all applications, we guarantee best service,pricing & delivery and we also guarantee sameday shipping.

Live feed for NHP rural areas of Moapa Laughlin Primm Alamo Indian Springs

Tri-Cities Frequencies, Live Scanners, CTCSS information and more

City of Milwaukee Fire Department Live Audio Feed

Live Police and Fire scanner feeds from Albion PA, Erie County PA USA.

This Class E RF amplifier will deliver up to 400 watts of RF output

Live audio of the National Hurricane Center’s Skywarn Nets. This live feed covers several different states, and locations throughout the US including: TX, LA, MS, AL, FL, GA, SC, NC, VA, MD, DE, PA, NJ, NY, CT, RI, MA, VT, and ME

Two coupled PAs with each 2 times 2C39 deliver around 400W RF.

PSKreporter displays the digital mode data of transmitting and receiving stations and displays them with additional information in selectable views.

Contesting, CW, antennas and review on TK/OE5XVL DXpedition 1999 plus my GD/OE5OHO DXpedition in 1997.

21 February to 6 March 2013 XT2TT Italian Dxpedition Team will be in Burkina Faso Online Log XT2TT and Live Stream

This transverter can deliver about 25w on it's own, and runs on 12v, making it suitable for portable service.

Screenshots of live QRSS signals from all over the world

iSpectrum is a free spectrum analyzer for MacOS that allows you to display live audio in a standard frequency plot, waterfall display or in a stereo oscilloscope view. Used by ham radio operators, audiofiles, musicians, and Sound Technicians.

RKI (Radio Korea International), an international broadcast service. Information and connection to live Real Audio broadcasts. RKi brings 10 languages news and Korean songs

W5KUB Broadcasting live video and audio from ARRL National Convention (Dayton Hamvention)

A live map of current KiWiSDR receivers available on the network. It allows users to explore a directory of web-controlled receivers for listening to HF and VHF stations worldwide. The site provides access to remote ham radio stations online, making it a valuable resource for amateur radio operators.

Dedicated to the design, manufacturing, technical support, and delivery of innovative and cost effective power solutions for worldwide applications. AC/DC switching power supplies and DC/DC converters.

West St. Louis County Police and Fire Live Audio Feed

Amateur radio kits. Makers of the WinKeyer, their goal is to keep homebrewing and kit building alive.

Last 15 minute Reverse Beacon Network spots on live graph, let you filter by dx spot continent or spotter continent, as well as by band and let you reduce bandwidth