SignalsEverywhere: Improving HF Reception with Impedance Matching
This week on the SignalsEverywhere YouTube channel host Corrosive explores why impedance matching matters when trying to obtain the best reception possible. To do this he reviews the NooElec 1:9 Balun,...
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A Low Cost 2.4 GHz Downconverter from off the Shelf Dev Boards
Over on GitHub Ian Wraith has released his design and microcontroller code for a low cost 2.4 GHz downconverter circuit. A downconverter is a hardware device that shifts the signals that it receives...
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PICTOR: An Open Source Low Cost Radio Telescope based on RTL-SDR
PICTOR is an open source and open hardware radio telescope that aims to promote radio astronomy on a budget. It consists of a 1.5 meter parabolic dish antenna, 1420 MHz feedhorn, a two stage low noise...
View ArticleWeather Satellite Meteor M2-2 Now Transmitting Images
Reports from Reddit and Twitter are in that the recently launched Meteor M2-2 weather satellite is now functional and broadcasting images at 137.9 MHz. A few people have noted that the reception...
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Slow Scan Moon Bounce Event for 50th Anniversary of the Moon landing
Fifty years ago Neil Armstrong became the first man to step foot on the moon. This weekend on June 20th and 21st 2019 Amateur Radio operators at the [PI9CAM] team have been transmitting Slow-Scan...
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Atomic Radio: Quantum Laser Based Radio Reception
Software defined radio (SDR) is a relatively new technology that has impacted the world of radio technology in many ways. But beyond SDR, there are still some other very interesting radio technologies...
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Weather Satellite NOAA 15 Appears to have Failed (Again)
Back in April 2018 we posted how the NOAA-15 APT weather satellite that many RTL-SDR users enjoy receiving images from was having problems with it's scan motor resulting in image errors. The satellite...
View ArticleA Demonstration of RSPDuo Diversity Being used to Cancel Local Interference
SDRPlay have recently published a video demonstrating how the new RSPduo diversity feature in SDRUno can be used to cancel local interference. The SDRplay RSPDuo is a 14-bit dual tuner software...
View ArticleSDR-Makerspace Talk: Evaluation of SDR boards and toolchains
The Software Defined Radio Academy YouTube channel recently uploaded an interesting talk by Alex Csete (creator of the popular GQRX and GPredict applications), and Sheila Christiansen. Their...
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Dronesense: A LimeSDR Based Drone Detector and Jammer
Over on the LimeSDR CrowdSupply blog, Ogün Levent has submitted a short article about his "Dronesense" project. Dronsense is a spectrum-scanning and jamming system based on the LimeSDR. The LimeSDR is...
View ArticleSignalsEverywhere: Satcom Antennas for L-Band Reception via RTL-SDR + Podcast...
On this episode of SignalsEverywhere on YouTube Corrosive shows off several antennas that can be used for Inmarsat and Iridium satcom reception. His video shows off a commercial Inmarsat branded...
View ArticleDecoding the Lucky-7 Cubesat
Lucky-7 is a Czech cubesat that carries some interesting sensors including a low power GPS receiver, a gamma ray spectrometer and dosimeter and a photo camera. The creators also claim that it is...
View ArticlePOLL: What do you want in a future low cost SDR?
We've decided to ask the community what sort of radio would be more popular for a ~$30 RX-only SDR. Note that thus far this is only a hypothetical SDR that does not yet have any designs. We are just...
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Developing Your Own SDR Applications With Python
[Max-Felix Müller] wanted to develop his own SDR application with the goal of learning python and a bit about signals processing. To accomplish this goal he’s using [pyrtlsdr] a library which wraps...
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GR-Oscilloscope: Using an Oscilloscope as a Software Defined Radio
A modern digital oscilloscope uses an analogue to digital converter (ADC) and digital signal processing (DSP), just like a software defined radio does, so it stands to reason that with some software...
View ArticleYouTube Review of the RS-918: A Chinese Clone of a Clone of the mcHF SDR
Over on YouTube Kevin Loughin has uploaded a video reviewing the "Recent RS-918" which is a Chinese clone of the popular mcHF open source SDR transceiver made by Chris (M0NKA). The mcHF is a well known...
View ArticleTracking Multiple Amateur Radio APRS Balloons with RTL-SDRs
Last month Jeff Deaton from "Edge of Space Sciences" (EOSS) presented a talk called "SDR Multi Balloon Tracking", where he discusses how EOSS are using RTL-SDR receivers to track their APRS high...
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Hackaday Looks back on Seven Years of RTL-SDR
Hackaday is a very popular blog that summarizes and aggregates all sorts of content related to hardware, electronics and software projects (just like we do with SDR content). Over the years Hackaday...
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PiSDR Image Gains PlutoSDR Support
[@Lugigi Cruz] has announced on twitter that his latest PiSDR image now includes full PlutoSDR support. PiSDR is a pre-built Raspberry Pi distribution that supports several SDRs including the RTL-SDR....
View ArticleYouTube Video: Information Packed Introduction to SDR
Over on YouTube Nick Black has uploaded a video where he does a good introduction to software defined radio (SDR), SDR history, how SDR works, various SDR concepts like sampling and bandwidth,...
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