Tag: FM

via the ARRL: ARISS Cross-Band Repeater Not Available for General Communication

The cross-band FM voice repeater aboard the International Space Station has not officially been activated for general amateur use, although some stations have reported successful contacts. The system is being used in an effort to detect telemetry from three recently deployed CubeSats. Russian ISS crew members last week released three satellites carrying Amateur Radio payloads […]

via HACKADAY: Old Rabbit Ears Optimized for Weather Satellite Downlink

Communicating with a satellite seems like something that should take a lot of equipment. A fancy antenna and racks full of receivers, filters, and amplifiers would seem to be the entry-level suite of gear. But listening to a weather satellite with an old pair of rabbit ears and an SDR dongle? That’s a thing too. […]

FCC Crackdown on Pirate Broadcasters Targets at Least One More Amateur Licensee

A recent flurry of FCC Enforcement Bureau correspondence to alleged unlicensed broadcasters has targeted at least one more radio amateur — this time in the Greater New York City area. It’s not the first time Winston A. Tulloch, KC2ALN, of Paterson, New Jersey, has heard from the FCC, which has had Tulloch in its sights […]

Consent Decree, Forfeiture Terminate FCC Interference Investigation

The FCC has again used a consent decree to resolve an enforcement matter. The FCC Enforcement Bureau recently concluded a radio interference investigation with “a negotiated settlement” and $90,000 civil penalty. The case against AFX Inc. involved the marketing of unauthorized RF devices that interfered with AM/FM radio reception. After the company’s NLL Series LED […]

via HACKADAY: Shut Up and Say Something: Amateur Radio Digital Modes

In a recent article, I lamented my distaste for carrying on the classic amateur radio conversation — calling CQ, having someone from far away or around the block call back, exchange call signs and signal reports and perhaps a few pleasantries. I think the idle chit-chat is a big turn-off to a lot of folks […]

via HACKADAY: Backscatter Your Own FM Pirate Radio Station

If you live in a city, you’re constantly swimming in a thick soup of radio-frequency energy. FM radio stations put out hundreds of kilowatts each into the air. Students at the University of Washington, [Anran Wang] and [Vikram Iyer], asked themselves if they could harness this background radiation to transmit their own FM radio station, […]

via HACKADAY: A Terahertz Modulator

We’re all used to the changes in the properties of radio frequency systems as the frequency increases and the wavelength becomes shorter. The difference between the way an FM radio and a WiFi adapter behave with respect to their environments, for instance. But these are relatively low frequencies in the scheme of electromagnetic radiation, as […]

Seriously Collecting Broadcasting’s Big Iron

Some of us collect postage stamps; others coins or perhaps matchbooks. There are a few individuals who collect vacuum tubes. However, one Ohioan has set a somewhat loftier goal: amassing a collection of broadcast-type radio transmitters. Gerry Moersdorf (KC8ZUL) began rounding up such transmitters more than 15 years ago, uprooting them from their former workspaces […]

via HACKADAY: Anatomy Of A Digital Broadcast Radio System

What does a Hackaday writer do when a couple of days after Christmas she’s having a beer or two with a long-term friend from her university days who’s made a career in the technical side of digital broadcasting? Pick his brains about the transmission scheme and write it all down of course, for behind the […]

via HACKADAY: Vintage Tube Radio Restorations

[J.B. Langston] has some vintage late-40’s/early-50’s tube radios that he wanted to repair – a Motorola All-American 5 AM radio, an Air Castle AM/FM radio and a Sears Silvertone AM/FM radio. He goes over, one by one, the three vintage radios, the problems they had, and how he got them back into working order. No […]

PODCAST: This Week in Amateur Radio #920

This podcast is suitable for air on amateur radio frequencies. Download podcast here: https://archive.org/details/TWIAR920HAM Here are the stories making news … This Week in Amateur Radio: Pacific Seafarers net assists with rescue of sailors Hurricane Matthew overview of amateur radio involvement ARRL says rules are restricting growth of amateur technology OZ1AA back home in Denmark after […]

Scanning the Spectrum of “Weird Wireless”

There are hundreds of different types of wireless applications. We all use the familiar mainstream wireless technologies like AM and FM radio, Wi-Fi, Bluetooth, and cellular. However, there are many other unusual and less-well-known wireless types. I call them “weird wireless.” I don’t mean it in a derogatory way—just that these technologies are different and […]

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