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Reviews of the Low Cost MLA-30 Wide Band HF Magnetic Loop Antenna
Recently Chinese manufacturers have begun producing a low cost wide band (100 kHz - 30 MHz) magnetic loop HF antenna known as the MLA-30. The loop can be found on eBay for under US$45 with free...
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NanoVNASaver Software Walkthrough + NanoVNA Firmware Updates Bring 1.5 GHz...
The NanoVNA is an open source VNA project by @edy555 and ttrftech that has recently become extremely affordable at less than US$50 for a fully assembled unit thanks to Chinese manufacturing (or a...
View ArticleYouTube Video: Reverse Engineering with SDR
Over on YouTube Black Hills Information Security (aka Paul Clark) has uploaded a one hour long presentation that shows how to use a software defined radio to reverse engineer digital signals using GNU...
View ArticleExploring the Limits of General Purpose SDR Devices
Back in August 2019 the Chaos Communication Camp was held in Germany. This is a 5 day conference that covers a variety of hacker topics, sometimes including SDR. At the conference Osmocom developer...
View ArticleDecoding the ARES Train Protocol with an RTL-SDR
Over on YouTube user JellyImages has uploaded a video demonstrating his Windows based ARESrcvr software. ARES is a railway control communications protocol used by some trains in the USA. His code...
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Vancouver Broadcasts Hospital Patient Data Over Unencrypted Wireless Pagers
Canadian based researchers from the "Open Privacy Research Society" recently rang the alarm on Vancouver based hospitals who have been broadcasting patient data in the clear over wireless pagers for...
View ArticleMonitoring 3D Printer Filament Moisture with an RTL-SDR and rtl_433
Over on Hackaday we've seen a post about Scott M. Baker's 3D printer filament drying farm that is monitored by a 433 MHz ISM band sensor and an RTL-SDR running rtl_433. If you're familiar with 3D...
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PREORDER SALE: Active L-Band 1525-1637 Inmarsat to Iridium Patch Antenna Set...
Over the last several months we've been working on a versatile active L-band patch antenna that can cover Inmarsat to Iridium satellite frequencies. That antenna is now almost ready, and should be able...
View ArticleLeif Continues his Comparisons of the Airspy HF+ Discovery, RSP1, Perseus and...
Leif (SM5BSZ) is fairly well known in the SDR community for doing very indepth technical tests of various SDR receivers over on his YouTube channel. Recently he's released part two of a series where he...
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Building An Open Source SDR Based Hydrogen Line Radio Telescope
Over on Reddit we've seen a post by u/ArtichokeHeartAttack who has been working on a hydrogen line radio telescope, based on an RTL-SDR dongle and horn antenna designs by the DSPIRA program, and the...
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Electrosense: RTL-SDR Based Crowd Sourced Spectrum Monitoring with a DC to 6...
Recently we came across Electrosense which is an interesting open source project that aims to deploy radio spectrum sensors worldwide in order to analyze and understand radio spectrum usage. This...
View ArticleMeasuring the USB Power Consumption of Various Software Defined Radios
Over on his YouTube channel icholakov has uploaded a video comparing the USB power consumption of various software defined radios. In his tests he uses an inline USB current meter and compares a...
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Fingerprinting Electronic Devices via their RF Emissions with an RTL-SDR and...
Thank you to José Carlos Rueda for submitting his simple shell script that he uses for fingerprinting spurious RF emissions with an RTL-SDR, rtl_power, heatmap.py and imagemagick. The result is...
View ArticleWatching Lightning Strikes on the Spectrum with an RTL-SDR
Over on YouTube user Tech Addict Attic has uploaded a video demonstrating what lightning strikes look like on the radio spectrum. To receive the pulses he uses an RTL-SDR and a simple wire antenna...
View ArticleLeif Continues his Comparisons of the Airspy HF+ Discovery, RSP1, Perseus and...
Leif (sm5bsz)'s series comparing the Airspy HF+ Discovery against various other SDRs such as the Perseus, SDRplay RSP1, Airpsy HF+ Dual, Airspy + SpyVerter and AFEDRI SDR-Net continues again, with...
View ArticleSignalsEverywhere: Decoding HD Radio with an RTL-SDR
Corrosive (KR0SIV) from the SignalsEverywhere YouTube channel has uploaded a new video that explains and shows HD radio being decoded with an RTL-SDR. If you are in the USA, you might recognize HD...
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G8JNJ Reverse Engineers and Reviews the MLA-30 HF Loop Antenna
Last month we posted a collection of reviews about the MLA-30 which is a budget magnetic loop antenna designed for receiving HF signals. The overall consensus from the reviews was that it worked...
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SDR# 1717 Officially Released: Dark Mode and Other Skins now Available
Release 1717 of the popular SDR# software that is commonly used with RTL-SDR dongles has just officially been released (actually already up to r1722 at the time of this post). This release brings with...
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A NanoVNA 2.0 is in the Works: Same Price, Frequency Range up to 3.5 GHz,...
Previously we've been posting about the NanoVNA which is an open source VNA project by @edy555 / ttrftech that has recently become extremely affordable at less than US$50 for a fully assembled unit...
View ArticleUsing a PlutoSDR to compare FreeDV Digital Voice with other Modes
Over on YouTube user Adrian M has uploaded a video where he compares the HF amateur radio digital voice mode known as FreeDV against other common voice modes such as USB, AM, FM and QPSK. To perform...
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