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Reducing Interference in the RTL-SDR
Luis Colunga has posted an interesting tip on his blog on how he reduced broadcast FM interference in the rtl-sdr dongle. He writes Many people have noticed that even if there is not an antenna...
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Tip: Effect of Power Sources on the Ham It Up Upconverter
The Ham-It-Up upconverter uses a 5V USB power input. I discovered that different 5v power sources can cause significant interference with this upconverter, and the same effect will probably occur in...
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Tip to Reduce Radio Interference on the RTL-SDR
A few months back we posted about a tip to reduce RFI (Radio Frequency Interference) on the RTL-SDR. Now Akos from the SDR for mariners blog has tried this tip for himself and written about his...
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Noise from the Sun with the RTL-SDR
YouTube user tvdxrools . has posted a short video showing what solar activity noise from the sun looks like on the waterfall at 31 MHz. He used an RTL-SDR dongle and 1/2 wave vertical antenna. The post...
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The Effect of Noise Produced by the RTL-SDR
Over on YouTube Adam, the creator of the LNA4ALL, LNA4HF and UP100 upconverter has uploaded a video showing that the noise that is produced by the RTL-SDR dongle itself can degrade performance when...
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Making a Cheap Noise Figure Indicator with an RTL-SDR
Amateur radio hobbyists Frank Schmaling (DL2ALF), Wolf-Henning Rech (DF9IC) and Alexander Kurpiers (DL8AAU) have uploaded a pdf document containing slides which show how they made a cheap noise figure...
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Testing a FM Broadcast Bandstop Filter
Over on YouTube user Cameron Conover has been testing a simple FM broadcast bandstop filter with his HackRF. The same filter can just as easily be used with the RTL-SDR to remove broadcast FM...
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Measuring Power Line Noise in the Neighbourhood with the RTL-SDR “Driveby”...
Over the last few months Tim Havens has been developing a portable RTL-SDR based scanner that he intends to use for geo-tagged noise floor readings. He hopes to use such a system to map sources of RF...
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Updates to the Power Line Noise Detector “Driveby” System
A few days ago we posted about Tim Havens “driveby” project, which is a RTL-SDR based system he developed to help create heatmaps of power line noise in his neighborhood. Upon doing further research,...
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CANFI: Cheap Automatic Noise Figure Indicator Updated to V2.7
Back in July 2014 we posted about the CANFI (Cheap Automatic Noise Figure Indicator) system. The CANFI system is a set of hardware components that include an RTL-SDR and a corresponding software...
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HamRadioScience: Why Apple’s iMac May be the Best PC for SDR Applications
Over on on the HamRadioScience blog, the author has uploaded an article that makes the case on why Apple iMac PC’s may be the best choice for SDR receivers (at least for HF frequencies). In the testing...
View ArticleShowing what Solar Power Inverter Interference Looks Like
Over on YouTube user ALI6359 has uploaded a video showing what severe interference from a neighbors poor quality solar power inverter looks like on his RTL-SDR dongle. An inverter converts the DC power...
View ArticleIdentifying Noise Sources in the Shack using an SDR and an Active Receive Loop
Over on YouTube user SignalSearch has uploaded a video showing how he uses an active magnetic loop antenna indoors to identify local noise sources. Magnetic loop antennas are directional, meaning that...
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Reducing HF Electrical Noise by Using a Faraday Cage for Switch-Mode Power...
Over on his blog, DXer OH2-2192 was frustrated by lots of local electrical noise showing up on the HF bands on his Airspy + Spyverter SDR receiver. He discovered that the majority of the noise he was...
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Generating White Noise with an FL2K Dongle
The FL2K project allows us to turn a cheap USB 3.0 dongle into a fully transmit capable SDR (filters still required for high power work). We have posted about the FL2k project several times on this...
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