Frugal Radio: SDR Guide Ep 8: Overcoming FM Broadcast Interference + Simple...
In this weeks episode of Frugal Radio's SDR Guide videos Rob shows how a FM bandstop filter can help in certain situations. A FM bandstop is designed to reduce the power level of FM broadcast stations...
View ArticleKerberosSDR with DF-Aggregator Direction Finding Attempt
Back in October we first posted about the release of DF-Aggregator, a program by Corey (ckoval7) which can be used to receive and plot data from multiple KerberosSDR direction finding units. If you...
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SSTV from the International Space Station Scheduled for Dec 24 – Dec 31
Thank you to Maksim for submitting news that the International Space Station (ISS) will be transmitting Slow Scan TV (SSTV) in late December to celebrate 20 years of amateur radio operations onboard...
View ArticleDragonOS: OP25 “Boatbod” P25 Phase 1 Running on GNU Radio 3.8 with RTL-SDR
DragonOS is a ready to use Ubuntu Linux image that comes preinstalled with multiple SDR program. The creator of DragonOS, Aaron, uploads various YouTube tutorials. In his latest tutorial he shows how...
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Tuning an R820T2 RTL-SDR up to 6 GHz via a Harmonic Mixing Driver Hack
A while back we heard a suggestion that it may be possible to use the 5th harmonic on R820T2 RTL-SDRs to receive frequencies much higher than the normal 1.766 GHz limit. After mentioning this to to...
View ArticleFrugal Radio: Filters 101 – Improving Reception for your SDR
Over on YouTube Rob from Frugal Radio has uploaded his latest video which explains RF filters in a concise and easy to understand way. RF filters are often used together with SDRs to block out strong...
View ArticleExplaining the 9A4QV V-Dipole Design for Receiving 137 MHz Weather Satellites
Back in 2017 we posted about Adam 9A4QV's simple V-Dipole antenna design which works very well for receiving NOAA and Meteor weather satellites at 137 MHz. This type of antenna is a lot easier to build...
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CalibrateSDR: Calibrating your SDR Frequency Offset with DAB+
Thanks to Andreas Hornig who has recently released a new program called "CalibrateSDR" (GitHub code) which is designed to accurately determine the frequency offset of an SDR via an IQ recording of a...
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New SDR# User Guide Available
Paolo Romani IZ1MLL has recently created a SDR# users guide document which comprehensively explains all the features and settings available in the program. SDR# (aka SDRSharp) from Airpsy.com is...
View ArticleTech Minds: Decoding Orbcomm Satellites with a Software Defined Radio
Over on his YouTube channel TechMinds has uploaded a new video showing how to decode signals from Orbcomm satellites. Orbcomm run a global network of low earth orbit satellites that perform services...
View ArticleUsing an RTL-SDR as a Panadapter with an Automatic Antenna Switcher
Over on YouTube "Gadget Talk" has uploaded a useful video showing how he set up an RTL-SDR V3 based panadapter system to use with his traditional amateur radio. The setup involves utilizing an antenna...
View ArticleFrugal Radio: SDR Guide Ep 9 – P25 LSM Trunking with one RTL-SDR V3 and DSDPlus
In his latest episode of his SDR Guide series Rob from Frugal Radio provides a walkthrough on using DSDPlus Fastlane to decode trunked P25 with just one RTL-SDR V3 dongle. In the video he explains each...
View ArticleSignalsEverywhere: A Front End GUI Control Head for OP25
Sarah from the SignalsEverywhere YouTube channel is back and this time showing off a new program she has created called "Pi25" or "OP25 Mobile Control Head". The program is a Python GUI for OP25 which...
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The R860 will replace the R820T2 – Same chip different name
We have recently received samples and tested the new R860 tuner chip from Rafael Micro. However, to be clear there is no change in terms of silicon or performance between the R820T2 and the R860. It is...
View ArticleEtherify Talk from The rC3 Online Conference
The "Chaos Computer Club (CCC)" have recently been uploading videos to YouTube from their "Remote Chaos Experience rC3" online conference. One talk is by Jacek Lipkowski (SQ5BPF) who presents his...
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Using SDR to Investigate Telemetry Still Broadcasting from 1960’s Satellite...
Thank you to Derek @ok9sgc for pointing us to some work Reddit user u/Xerbot has been doing on receiving telemetry coming down from a "dead" 1960's satellite called Transit-5B5. The fleet of Transit...
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SATRAN: An Affordable Motorized Satellite Antenna Rotator
Recently we came across the SATRAN project by Daniel Nikolajsen, which is an attempt to design, build and sell low cost kits of an automatic motorized satellite antenna rotator for less than US$200. A...
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FengYun-2G Confirmed to be Receivable with a WiFi Grid Dish
Back in November 2020 we posted about the release of a decoder for the FengYun line of geostationary weather satellites which provide full disk images of the Earth and are positioned to cover parts of...
View ArticleHacking a Ceiling Fan Radio Control Signal with an RTL-SDR
Over on YouTube "River's Educational Channel" has uploaded a video showing how he was able to reverse engineer the wireless control signal from his ceiling fan remote, and use that information to...
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GNU Radio 3.9.0.0 Released
GNU Radio is an open source digital signal processing (DSP) toolkit which is often used in cutting edge radio applications and research to implement decoders, demodulators and various SDR algorithms....
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