Tag: RF

via HACKADAY: Scribble Your Way To Quick Printed Circuit Boards

There are a variety of techniques employed by electronic constructors seeking the convenience of a printed circuit board without the inconvenience of making a printed circuit board. Dead bug style construction in which the components float on a spiders-web of soldered leads above a ground plane is one, Manhattan style construction in which pads made […]

PODCAST: This Week in Amateur Radio #960

This Week in Amateur Radio #960 Week of July 22, 2017 DOWNLOAD HERE: http://bit.ly/TWIAR960 Running Time: 1:14:13 Here is a summary of the news trending This Week in Amateur Radio. This is for Edition #960 with a release and air date of, July 22, 2017.This weeks edition is anchoredby,Rich Lawrence, KB2MOB, Don Hewlick, K2ATJ, Will […]

FCC Threatens ‘Lifetime Ban’ on Non-Compliant RF Equipment Suppliers

On May 23, 2017, the Federal Communications Commission (FCC) issued an Order and Consent Decree, imposing a steep fine and other penalties on a manufacturer and distributor of radio frequency (RF) devices that failed to comply with the FCC’s testing and authorization rules before marketing its product. The devices reportedly caused interference to radio transmissions, […]

via HACKADAY: PCB Design Guidelines to Minimize RF Transmissions

There are certain design guidelines for PCBs that don’t make a lot of sense, and practices that seem excessive and unnecessary. Often these are motivated by the black magic that is RF transmission. This is either an unfortunate and unintended consequence of electronic circuits, or a magical and useful feature of them, and a lot […]

via HACKADAY: Recapture Radio’s Roots with an Updated Regenerative Receiver

Crystal radios used to be the “gateway drug” into hobby electronics. Trouble was, there’s only so much one can hope to accomplish with a wire-wrapped oatmeal carton, a safety-pin, and a razor blade. Adding a few components and exploring the regenerative circuit can prove to be a little more engaging, and that’s where this simple […]

via HACKADAY: Shmoocon 2017: A Simple Tool For Reverse Engineering RF

Anyone can hack a radio, but that doesn’t mean it’s easy: there’s a lot of mechanics that go into formatting a signal before you can decode the ones and zeros. At his Shmoocon talk, [Paul Clark] introduced a great new tool for RF Reverse Engineering. It’s called WaveConverter, and it is possibly the single most […]

via HACKADAY: Pumping Up An Antenna From A Stream Of Sea Water

Our Hackaday readership represent a huge breadth of engineering experience and knowledge, and we get a significant number of our story tips from you. For instance, today we are indebted to [sonofthunderboanerges] for delivering us a tip in the comment stream of one of our posts, detailing an antenna created by coupling RF into a […]

via HACKADAY: EM Drive Paper Published By Eagleworks Team

There are one or two perennial scientific stories that sound just too good to be true, but if they delivered on their promise would represent a huge breakthrough and instantly obsolete entire fields. One example is so-called “cold fusion”, the idea that nuclear fusion could be sustained with a net energy release at room temperature […]

via HACKADAY: FCC Reaches Agreement With Router Manufacturers

Last year, the Federal Communications Commission proposed a rule governing the certification of RF equipment, specifically wireless routers. This proposed rule required router manufacturers to implement security on the radio module inside these routers. Although this rule is fairly limited in scope – the regulation only covers the 5GHz U-NII bands, and only applies to […]

via HACKADAY: What’s Special about Fifty Ohms?

If you’ve worked with radios or other high-frequency circuits, you’ve probably noticed the prevalence of 50 ohm coax. Sure, you sometimes see 75 ohm coax, but overwhelmingly, RF circuits work at 50 ohms. [Microwaves 101] has an interesting article about how this became the ubiquitous match. Apparently in the 1930s, radio transmitters were pushing towards […]

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