atc live

SWR: Maximum allowable VSWR - VSWR (voltage-standing-wave-ratio) represents the degree with which an antenna is "matched" to the system impedance. Most modern antennas do not require any tuning for optimum performance. VSWR is one of the easiest parameters to measure and VSWR meters are becoming very popular antenna installation tools

Wireman-J-Poles for 2m-40m  ^{updated  pop} - J-Poles with Wireman-cables for the quarterwave matching section

T-Match Construction - The T-Match with its balanced feed point is one method of feeding a Balanced Dipole.

Homebrew Monster Xmatch - Home made Xmatch by Jozef Hand-Boniakowski WB2MIC

K5ZD contest audio recordings - Have you ever wanted to listen in on a serious SO2R DX contest effort? hear what the low bands sound like from New England? enjoy a contest without having access to a radio? This is your chance!

K6RF Streaming Video - Live video and audio feed from K6RF ex K6DXC radio shack. Audio is from either the FT-920, FT-817 receivers or a microphone. Video is from a Logitech Pro-4000 Webcam

New York Hudson Falls live scanner - Live feed from Warren county fire dep. radio

Live online streaming for arizona - Listen to original audio content from Flagstaff, Coconino County and Northern Arizona. Streaming Police scanner by azradiowaves.net

Jefferson County New York Live Scanner - Live Police Fire Rescue scanner for Jefferson County, New York.

Convert PC Power Supplies for use by Ham Radio - PC power supply conversion for ham radio use. Slide show overview showing how convert PC Power supplies to ham radio use presented at the August 2007 FSARC meeting.

GLA Systems - Texas BugCatcher antenna manufacturers. Mobile antenna for hf bands. The serious HF Mobile Antenna by Henry Allen, K5BUG

FlexRadio Systems - Software Defined Radios - FlexRadio Systems delivers the first truly open source Software Defined Radio transceiver for Amateur Radio use. Receive Only versions are also available for non Amateur Radio applications. Read the SDR Articles and the SDR-1000 Product Information.

SoftRock-40 - The SoftRock-40 is a small, low-cost, good-performing "software defined radio" receiver that plugs into a computer USB port and delivers I-Q audio signals to the computer's sound card. It was designed by Tony Parks, KB9YIG and Bill Tracey, KD5TFD as an "SDR sampler project" for hams everywhere to easily try out software defined radio.

Psk31 - PSK31 is a digital communications mode which is intended for live keyboard-to-keyboard conversations, similar to radioteletype. Its data rate is 31.25 bauds (about 50 word-per-minute), and its narrow bandwidth (approximately 60 Hz at -26 dB) reduces its susceptibility to noise.

KØBG's ham radio mobile operator web site - This site is dedicated to mobile amateur radio operators, old and new alike. Whether you are into HF, or VHF operation, I trust the information presented will increase your enjoyment of our great hobby. With safety as a byword, there are articles on amplifiers, antennas, bonding, impedance matching, installing hardware, mobile equipment, noise and RFI abatement, wiring, and much more. I do my best to keep these articles up to date, and easy to follow.

Real Time Satellite tracking  ^pop - Select your favorite satellite and watch its trajectory on Google Maps in real time! Includes ISS tracking, Weather, Geostationary, GPS Military, and of course Amateur radio satellites

HF Antennas for restricted space - Arrl document about invisible antennas and indoor systems. It is important to consider that few compromise antennas are capable of delivering the performance one can expect from the full-size variety. But the patient and skillful operator can often do as well as some fellows who are equipped with high power and full-size antennas. The "cliff-dweller" may not be able to "bore a hole" in the band as often, and as easily, but DX can be worked successfully when band conditions are suitable.

CRWATCH : clandestine radio watch - Distribution list for Clandestine Radio Watch a 'twice a month' summary about recent Clandestine Radio and Clandestine Radio related activities edited by Martin Schoech

SmartSmith - A smarter version of the Smith Chart program. It allows you to dynamically generate impedance point plots as you configure each design element of an impedance matching network. Has an extensive Help file with a Wizard that tells you what steps to take in designing a matching network for a given load impedance. Complete Windows installation kit by w9dmk

XLZIZL by AC6LA - XLZIZL is an Excel application that analyzes the components of an antenna feed system, including transmission lines, stubs, baluns, and tuners. Calculations include impedance transforms, SWR and reflection coefficient, power loss, voltage and current standing waves, stress on tuner components, network attenuation (S21), and return loss Analysis results are available in worksheet format and in five different chart formats, including Smith charts.

The hunter six amplifier review - Review by Clive Davies, G4FV

W4ATC QRP Project - Beginners making inexpensive, low-power shortwave transceivers from kits.

New Developments with PLC in Japan - The Japan Amateur Radio League (JARL) is cautiously watching new developments concerning the commercialization of Power Line Communications (PLC), while continuing to carry out joint experiments with a high speed power line communication promoters' alliance to reduce potential interference to radio communications.

Japan plays catch-up in high-speed plc - telecom asia

Broadband over power lines - PLT/PLC/BPL/DPL - it doesn't matter what you call it said one of our readers it has significant technical problems