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Fan Cooling the RTL-SDR
Over on his Japanese blog Nobu has uploaded a post showing how he modified his RTL-SDR dongle to be air cooled via two small PC fans (post is in Japanese but can be read with Google Translate – right...
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Receiving WSPR with a Direct Sampling Modified RTL-SDR
Over on YouTube user Veryokay has uploaded a video showing how he was able to receive WSPR (Weak Signal Propagation Report) signals at 14 MHz with his direct sampling modified RTL-SDR. WSPR is a HF...
View ArticleRTL-SDR Stock Antenna Teardown and VNA Measurements
Over on his YouTube channel oh2ftg has uploaded two new RTL-SDR related videos. In the first video he does a tear down on the stock standard antennas that are supplied with most cheap RTL-SDR units. He...
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Stealing a Drone with Software Defined Radio
PHDays (Positive Hack Days) is a yearly forum with a focus on ethical hacking and security. During this years forum which took place in June, the organizers set up a competition where the goal was to...
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An ADS-B Decoder for the GOMX-3 Satellite ADS-B Repeater
The GOMX-3 is a CubeSat which carries an experimental ADS-B repeater. Since it is a satellite the experimental receiver hopes to be able to receive ADS-B from orbit, then beam it back down to earth at...
View ArticleReverse Engineering a Commercial Inmarsat Front-End to use with the RTL-SDR
Over on his YouTube channel Adam 9A4QV has uploaded a video showing a commercial Inmarsat front end which he reverse engineered to use with his RTL-SDR. The front end is a duplexor, which allows both...
View ArticleUsing the SDRplay and SDRTouch on an Android Mobile Phone
A few months ago the popular SDRTouch software for Android added support for the SDRplay RSP. The RSP is a $149 USD software defined radio with a tuning range of 100 kHz to 2 GHz and a 12 bit ADC. Over...
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LimeSDR CrowdFunding Closing in Four Days: 80% Funded
The LimeSDR is a new transmit capable software defined radio with a 100 kHz – 3.8 GHz frequency range, 12-bit ADC and 61.44 MHz bandwidth which is currently seeking crowdfunding. At the time of this...
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SDRplay Releases SDRuno: Free SDR Software for the RSP
The SDRplay is a $149 USD RX only software defined radio with a 12-bit ADC and up to 8 MHz of bandwidth that can tune from 10 kHz – 2 GHz. We consider it and it’s competitors the Airspy R2/Mini to be...
View ArticleRemote Spectrum Monitoring Drone with OpenWebRX, Raspberry Pi and an RTL-SDR
Recently Zoltan of rfsparkling.com wrote in to us to show us how he combined efforts with András (programmer of the OpenWebRX software) to create a proof of concept remote spectrum monitoring drone....
View ArticleUsing the SUP-2400 Downconverter with an LNA and RTL-SDR to Receive 2.4 GHz...
Earlier in June YouTube user T3CHNOTURK posted a video demonstrating him receiving signals above the maximum 1.7 GHz range of the RTL-SDR by using a modified SUP-2400 downconverter. Back in April it...
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Final Hours for LimeSDR CrowdFunding
The LimeSDR crowdfunding campaign is now in it’s final few hours (22 hours left at the time of this post), and funding is up to 95% or 473k out of its 500k goal. After a few unsure days it looks like...
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Building a Quad RTL-SDR Receiver for Radio Astronomy
Amateur radio astronomer Peter W East has recently uploaded a new document to his website. The document details how he built a quad RTL-SDR based receiver for his radio astronomy experiments in...
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50 Units of a $199 Nuand bladeRF x40 for Sale: 1-Day Only
Nuand is the company responsible for the bladeRF software defined radio. The bladeRF x40 is a SDR that usually costs $420. It uses a LimeMicro LMS6002D chip, which has a 12-bit ADC and a tuning range...
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Instructions for Building a Portable Double Cross Antenna: Great for...
Over on Reddit user merg_flerg has uploaded an imgur post that carefully details a step by step guide for building a double cross antenna. A double cross antenna is great for reception of satellites...
View ArticleTesting L-Band Inmarsat Reception with Three LNA4ALL’s + Two Filters
Over the last few weeks Adam 9A4QV has been testing L-Band Inmarsat reception with his LNA4ALL low noise amplifiers. In a previous post he tested reception with two LNA4ALL and found that he got an...
View ArticleSniffing ANT-FS with an RTL-SDR and MMDS Downconverter in Pothos
ANT-FS is a wireless file transfer protocol that is designed specifically for transferring files wireless between two devices. It is designed for ultra low power devices and typically runs on devices...
View ArticleTesting out the SDRplay with SDRuno and Characterizing RF HF Filters
Over on YouTube user Mile Kokotov has uploaded a video showing him using the SDRplay on the recently released official software SDRuno. In the video he first shows reception of some HF signals, then...
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SDR4Everyone: Review of the HackRF
Over on his ‘SDR4Everyone’ blog author Akos has recently uploaded a new post that reviews the HackRF One, and also compares it against the SDRplay RSP and RTL-SDR. In his review he discusses his first...
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Cyberspectrum #16: Software Defined Radio Meetup
Every month SDR evangelist Balint Seeber hosts the Cyberspectrum Meetup in San Francisco, where many SDR fans come together to listen to various presentations. This months meetup is due to be held on...
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