Category Archives: ham radio

Ham Radio Gets Embedded RTL-SDR

We usually think of the RTL-SDR as a low-cost alternative to a “real” radio, but this incredible project spearheaded by [Rodrigo Freire] shows that the two classes of devices don’t have to be mutually exclusive. After nearly 6 months of work, he’s developed and documented a method to integrate a …read more

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Posted in FT-991, ham radio, radio hacks, RTL-SDR, tap, USB hub, yaesu | Leave a comment

CB Radio + Arduino = 6 Meter Ham Band

Somehow [hvde] wound up with a CB radio that does AM and SSB on the 11 meter band. The problem was that the radio isn’t legal where he lives. So he decided to change the radio over to work on the 6 meter band, instead.

We were a little surprised …read more

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Posted in am, arduino, Arduino Hacks, cb radio, dds, ham radio, ssb, synthesis, wireless hacks | Leave a comment

An SDR Transceiver The Old-School Way

Software-defined radios or SDRs have provided a step-change in the way we use radio. From your FM broadcast receiver which very likely now has single-application SDR technology embedded in a chip through to the all-singing-all-dancing general purpose SDR you’d find on an experimenter’s bench, control over signal processing has moved …read more

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Posted in amateur radio, ham radio, quadrature, radio, radio hacks, sdr, transceiver | Leave a comment

Hams Gone Wild: Amateur Radio Field Day 2019

Of all the images that amateur radio conjures up, the great outdoors doesn’t usually figure heavily. People seem to think hams sit in a dark room at a desk heavy with radio gear, banging out Morse code into late into the night and heedless of the world outside the window. …read more

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Posted in amateur radio ARRL, APRS, contest, DX, field day, FT8, GOTA, ham radio, HF, radio hacks, uhf, VHF | Leave a comment

Building A Magnetic Loop Antenna

Antennas come in many shapes and sizes, with a variety of characteristics making them more or less suitable for various applications. The average hacker with only a middling exposure to RF may be familiar with trace antennas, yagis and dipoles, but there’s a whole load more out there. [Eric Sorensen] …read more

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Posted in antenna, antenna build, ham radio, magnetic loop antenna, radio, radio hacks | Leave a comment

Be Vewy Vewy Quiet, We’re Hunting Baofengs

In the world of ham radio, a “Fox Hunt” is a game where participants are tasked with finding a hidden transmitter through direction finding. Naturally, the game is more challenging when you’re on the hunt for something small and obscure, so the ideal candidate is a small automated beacon that …read more

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Posted in Arduino Hacks, baofeng, fox hunt, ham radio, mp3 player, radio hacks, relay, transmitter | Leave a comment

Lime SDR (and Pluto, Too) Sends TV

If you have experienced software defined radio (SDR) using the ubiquitous RTL SDR dongles, you are missing out on half of it. While those SDRs are inexpensive, they only receive. The next step is to transmit. [Corrosive] shows how he uses DATV Express along with a Lime SDR or a Pluto (the evaluation device from Analog Devices) to transmit video. He shows how to set it all up in the context of ham radio. An earlier video shows how to receive the signal using an SDR and some Windows software. The receiver will work with an RTL SDR or a …read more

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Posted in amateur radio, atv, DATV Express, DVB-S, DVBS, ham radio, Lime SDR, pluto sdr, radio hacks, SDRAngel, tv, video hacks | Leave a comment

Morse Code Keyboard 1939 Style!

If you want to learn Morse code and you don’t have a teacher, you’d probably just head over to a website or download a phone app. Before that, you probably bought a cassette tape or a phonograph record. But how did you learn Morse if you didn’t have any of that and didn’t know anyone who could send you practice? Sure, you could listen to the radio, but in 1939 that might be difficult, especially to find people sending slow enough for you to copy.

Wireless World for August 3rd, 1939, has the answer in an article by [A. R. …read more

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Posted in classic hacks, Hackaday Columns, ham radio, morse code, radio hacks, simple, trainer | Leave a comment

Google Assistant, Now Available On Ham Radio

Depending on who you talk to, Google Assistant is either a tool capable of quickly and clearly answering audio queries in natural langauge, or a noisier and less useful version of Wolfram Alpha. [William Franzin] decided it would be particularly cool to make the service available over ham radio – and that’s exactly what he did.

[William] got the idea for this project after first playing with the Internet Radio Linking Project, a system which uses VoIP technologies to link radio networks over the internet. Already having an IRLP node, it seemed only natural to make it into a gateway …read more

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Posted in google assistant, ham radio, IFTTT, irlp, radio, radio hacks | Leave a comment

FCC Gets Complaint: Proposed Ham Radio Rules Hurt National Security

On November 10th, [Theodore Rappaport] sent the FCC an ex parte filing regarding a proposed rule change that would remove the limit on baud rate of high frequency (HF) digital transmissions. According to [Rappaport] there are already encoded messages that can’t be read on the ham radio airwaves and this would make the problem worse.

[Rappaport] is a professor at NYU and the founding director of NYU Wireless. His concern seems to relate mostly to SCS who have some proprietary schemes for compressing PACTOR as part of Winlink — used in some cases to send e-mail from onboard ships.

The …read more

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Posted in encryption, fcc, ham radio, news | Leave a comment