Category Archives: radio hacks

Retrotechtacular: 934 MHz CB Radio

The radio spectrum is carefully regulated and divided up by Governments worldwide. Some of it is shared across jurisdictions under the terms of international treaties, while other allocations exist only in individual countries. Often these can contain some surprising oddities, and one of these is our subject today. Did you …read more

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Posted in 934 MHz, cb, cb radio, radio hacks, Retrotechtacular, uk | Leave a comment

Intercontinental Radio Communications With The Help Of Fly Fishing Reels

All of us have experience in trying to explain to a confused store assistant exactly what type of kitchen implement you’re looking for, and why it is a perfectly suitable part for your autonomous flying lawn mower. Or in the case of [MM0OPX] trying to find fly fishing reels that …read more

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Posted in antenna, antenna build, ham radio, radio hacks, wireless communications | Leave a comment

A Miniature Radio Telescope in Every Backyard

You probably wouldn’t expect to see somebody making astronomical observations during a cloudy day in the center of a dense urban area, but that’s exactly what was happening at the recent 2019 Philadelphia Mini Maker Faire. Professor James Aguirre of the University of Pennsylvania was there demonstrating the particularly compact …read more

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Posted in 2019 Philadelphia Maker Faire, arduino, cons, DirecTV, pan and tilt, radio hacks, Radio Telescope, RTL-SDR, science, stepper motor | Leave a comment

Raspberry Pi Ham Radio Remote Reviewed

One problem with ham radio these days is that most hams live where you can’t put a big old antenna up due to city laws and homeowner covenants. If you’re just working local stations on VHF or UHF, that might not be a big problem. But for HF usage, using …read more

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Posted in ham radio, mfj, morse code, radio hacks, Raspberry Pi, Remote monitoring | Leave a comment

Probe the Galaxy on a Shoestring with this DIY Hydrogen-Line Telescope

Foil-lined foam insulation board, scraps of lumber, and a paint-thinner can hardly sound like the tools of a radio astronomer. But when coupled with an SDR, a couple of amplifiers, and a fair amount of trial-and-error tweaking, it’s possible to build your own hydrogen-line radio telescope and use it to …read more

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Posted in 1420.4058 MHz, bandpass filter, fft, GnuRadio, horn, hydrogen line, LNA, Radio Astronomy, radio hacks, sdr, spectrometer, waveguide | Leave a comment

Chinese Radio Telescope Hopes to Find Exoplanets FAST

People who enjoy radio are constantly struggling to find a place to erect a bigger and better antenna. Of course it’s a different story and the most hardcore end of the spectrum: radio astronomers. The Chinese are ready to open up a new radio telescope called FAST (Five-hundred-meter Aperture Spherical …read more

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Posted in china, news, Radio Astronomy, radio hacks | Leave a comment

Complex Impedences Without The Pain

Any grizzled electronic engineer will tell you that RF work is hard. Maintaining impedance matching may be a case of cutting wires to length at lower frequencies, but into the low centimetre and millimetre wavelengths it becomes a Dark Art aided by mysterious and hugely expensive test equipment beyond …read more

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Posted in complex impedance, impedance, radio hacks, RF, vna | Leave a comment

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

Steampunk Radio Looks The Business

Radios are, by and large, not powered by steam. One could make the argument that much of our municipal electricity supply does come via steam turbines, but that might be drawing a long bow. Regardless, steampunk remains a popular and attractive aesthetic, and it’s the one that [Christine] selected for …read more

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Posted in gears, radio, radio hacks, steampunk | Leave a comment

The Satellite Phone You Already Own: From Orbit, UbiquitiLink Will Look Like a Cell Tower

For anyone that’s ever been broken down along a remote stretch of highway and desperately searched for a cell signal, knowing that a constellation of communications satellites is zipping by overhead is cold comfort indeed. One needs specialized gear to tap into the satphone network, few of us can justify …read more

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Posted in cdma, Featured, news, Original Art, radio hacks, satellite phone, TDMA, UbiquitiLink, wireless hacks | Leave a comment