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Demonstrating the Effect of Square Wave Harmonics with a HackRF and RTL-SDR (jue, 19 dic 2024)
Over on YouTube Paul from 'Tall Paul Tech' has uploaded a video that explains and demonstrates the effect of square wave harmonics using a HackRF and RTL-SDR. Paul starts by using GNU Radio to explain how square waves are created from a set of sine waves, and how a signal can essentially turn into a […]
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Sn0ren Tests out the KrakenSDR (Wed, 18 Dec 2024)
Over on his YouTube channel, sn0ren has uploaded a video showing his experience with the KrakenSDR. If you weren't already aware, KrakenSDR is our 5-channel coherent radio based on RTL-SDRs, and it can be used for applications like radio direction finding. It can currently be purchased from Crowd Supply or Mouser. In the video, sn0ren […]
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Saveitforparts: Receiving the Bitcoin Blockchain from the Blockstream Satellite Network (Wed, 18 Dec 2024)
Over on his YouTube channel 'saveitforparts' has uploaded a new video showing how he was able to download the Bitcoin blockchain via the Blockstream Satellite network. The Blockstream satellite network allows people in remote communities without an internet connection to receive the entire Bitcoin blockchain via satellite. With the blockchain Bitcoin users can confirm if […]
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SignalSDR Pro: An Upcoming SDR with 70 MHz to 6 GHz, 12 Bit ADC, 61.44 MHz Bandwidth and 2TX/2RX Channels (Wed, 18 Dec 2024)
Over on CrowdSupply, a new software-defined radio called the 'SignalSDR Pro' made by Hong Kong company Signalens has recently been announced. The SignalSDR Pro is roughly the size of a credit card or Raspberry Pi and has a 70 MHz to 6 GHz tuning range, 12-bit ADC, 61.44 MHz of bandwidth, and 2RX/2TX channels. The […]
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Investigating the Transit 5B-5/E-5 Satellite: The oldest satellite still transmitting (Tue, 17 Dec 2024)
Transit 5B-5 is a US Navy navigation satellite that was an early version of the GPS/GNSS system we enjoy today. It was launched in 1964 and has been transmitting continuously for roughly 60 years. Unlike many dead satellites that only emit a carrier tone, this one still broadcasts modulated telemetry on about 136.65 MHz, making […]
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