Tagged: airspy

Airspy and YouLoop Black Friday Sale Now Active: 20% OFF

Airspy is holding their annual Black Friday sale, this year offering 20% off their range of products. The sale is active at all participating resellers, which includes our own store where we have the YouLoop on sale for US$31.96 including free shipping to most countries in the world, instead of the usual US$39.95. Please note that due to EU VAT collection laws, EU customers must purchase the discounted YouLoop from our eBay or Aliexpress stores. 

The YouLoop is a low cost passive loop antenna for HF and VHF. It is based on the Möbius loop design which results in a high degree of noise cancelling. However the main drawback is that it is a non-resonant design, which means that it works best when used with ultra sensitive receivers like the Airspy HF+ Discovery. 

Some good reviews include the YouTube videos done by Frugal Radio where he reviews HF reception and VLF & LF reception with an Airspy HF+, and later tests it with an RTL-SDR Blog V3 using direct sampling. Techminds also has an excellent review on his YouTube channel. We also have a product release overview on this post from March 2020.

During the sale the price of Airspy SDRs and their upconverters are:

  • Airspy R2: $160.00 $135.20
  • Airspy Mini: $99.00 $79.20
  • Airspy HF+ Discovery: $169.00 $135.20
  • Airspy SpyVerter: $49.00 $39.20

SDRSharp Big Guide Book Updated to V5.3

Paolo Romani (IZ1MLL) has recently released version 5.3 of his SDRSharp PDF Guide. The book is available for download on the Airspy downloads page, just scroll down to the title "SDR# Big Book" and choose your language.

As before the document is a detailed guide about how to use SDRSharp (SDR#), which is the software provided by Airspy. While intended for Airspy devices, SDRSharp also supports a number of third party SDRs, including the RTL-SDR, and it is the software we recommend starting with when using an RTL-SDR.

Paolo writes:

Youssef Touil hasn't rested for a moment and the SDR# releases have been moving forward in leaps and bounds with new Denoisers (NINR), CCC, Audio/Baseband records and the new menu features.

I also had to re-update my Big Book PDF to v5.3 as a result!!

I have also implemented the SpyServer section a lot in multi OS and a chapter "Ideas and Suggestions" with two paragraphs: SDR & MacOS and the other using SDR# with two multiple monitors.

SDR# Co-Channel Canceller and Micro Tuner Updates

SDRSharp (SDR#) is one of the most popular SDR programs that is used often with Airspy and RTL-SDR devices. Recently Youssef, the developer of Airspy products and the programmer behind SDR# has again been adding new enhancements to the software that allow AM DX listeners to easily receive channels that are even on top of each other in frequency.

The Co-Channel Canceller has been in SDR# since 2020, but recently enhanced for better performance and easier use, and a 'micro-tuner' feature has been added, allowing users to easily select the overlapping channel that needs to be cancelled. 

Earlier in the year the noise canceller was also improved with a 'NINR' (Natural Intelligence Noise Reduction) algorithm that appears to be one of the best noise cancellers available in SDR software today.

Youssef's twitter @lambdaprog contains several videos demonstrating the effectiveness of the updates.

Airspy 2022 Summer Sale + SDR# Noise Reduction Improvements

Airspy is currently holding a 15% off summer promotion which runs until June 30. The sale is active at all participating resellers, which includes our own store where we have the YouLoop on sale for US$29.71 including free shipping to most countries in the world. Please note that due to new EU VAT collection laws, EU customers must purchase the discounted YouLoop from our eBay or Aliexpress stores. 

The YouLoop is a low cost passive loop antenna for HF and VHF. It is based on the Möbius loop design which results in a high degree of noise cancelling. However the main drawback is that it is a non-resonant design, which means that it works best when used with ultra sensitive receivers like the Airspy HF+ Discovery. 

Some good reviews include the YouTube videos done by Frugal Radio where he reviews HF reception and VLF & LF reception with an Airspy HF+, and later tests it with an RTL-SDR Blog V3 using direct sampling. Techminds also has an excellent review on his YouTube channel. We also have a product release overview on this post from March 2020.

Airspy SDR# Noise Reduction Improvements

We also wanted to highlight some recent improvements to SDR#, the official software for Airspy products, and compatible with the RTL-SDR. One recent development is the introduction of the Natural Intelligence Noise Reduction (NINR) feature which results less audio artifacts, deeper noise cancelling, and lower CPU usage.

Airspy "NINR" Noise Reduction on 40m

Frugal Radio: Experimenting with Rdio-Scanner and Trunk Recorder on P25 LSM

In his latest video Rob from the Frugal Radio YouTube channel has uploaded a video where he experiments with a SDR web interface and smartphone App called "Rdio-scanner". Rdio-scanner is an interface that tries to reproduce the user experience of using a real hardware scanner with an SDR and RF voice decoding/recording software like Trunk Recorder being used in the background. Rob writes:

rdio-scanner creates a customizable web interface from which to control your software defined radio. Using it, you can turn a computer, phone or tablet into something that closely resembles a hardware scanner!

Trunk Recorder is the software that decodes the unencrypted P25 signals and records them to disk. Here is it demonstrated working on a large Simulcast (LSM) site.

rdio-scanner reads the audio files. Through the rdio-scanner interface, you are basically choosing which audio files to play.

Rob runs the rdio-scanner software on his Panasonic Toughbook, noting that the interface looks really great in Tablet mode and works well with the touchscreen. He also notes that his toughbook has a SIM card socket, so a data SIM would enable him to access his P25 monitoring system at home from anywhere. 

SDR experiments with Rdio-scanner, Trunk Recorder, Airspy Mini & Panasonic Toughbook on P25 LSM

SDRSharp Guide V4.2 Released

Paolo Romani (IZ1MLL) has recently released version 4.2 of his SDRSharp PDF Guide. The book is available for download on the Airspy downloads page, just scroll down to the title "SDR# Big Book in English".

As before the document is a detailed guide about how to use SDRSharp, which is the software provided by Airspy. While intended for Airspy devices, SDRSharp also supports a number of third party SDRs, including the RTL-SDR, and it is the software we recommend starting with when using an RTL-SDR.

Paolo writes:

My new v4.2 SDRsharp PDF is out. The guide is now 139 pages long, and covers all the settings, UI customization, included and third party plugins, and use of some external decoders and software, now with Spyserver integration with Raspberry Pi 3/4, etc etc...

SDR++ Android App Public Pre-Release Now Available

SDR++ is an open source program compatible with most software defined radios including the RTL-SDR that has been going through rapid development making it now one of the top software choices.

Yesterday a public 'pre-release' Android version of SDR++ was made available for download. The release is announced as a 'pre-release' due to various bugs still existing. However, we note that we have been testing a private release for the past few weeks, and we can say that it is working great most of the time. The Android App replicates most of the desktop experience perfectly, and it operates very smoothly on most modern devices.

The author Alexandre Rouma writes:

I'm happy to release the first public pre-release of SDR++ for android. It's still quite early and has a few bugs and quirks that you might run into:

  • SDR MUST be plugged in before starting SDR++ and you MUST press refresh in the SDR source you're using before pressing play if you first plugged in the SDR or unplugged/replugged, otherwise expect a crash. The USB handling still needs some work.
  • There are still a few UI glitches
  • There is no easy way to select a path for recording or file for playback
  • The audio sink on Android may have higher latency
  • All menus sometimes close when app goes in the background.
  • Resizing the menu and/or waterfall is kinda fiddly, be precise when trying to grab the resize bar!!!
  • At some size menu sizes, the app crashes. If this happens, start in landscape
  • On Samsung devices, the keyboard doesn't always work for some obscure reason...

MINIMUM REQUIREMENTS:

  • Android 9.0
  • OpenGL 2.1

Since phones usually have a high screen resolution, set the DPI scaling in the Display menu or you'll have a hard time using the app.

Current Device/Protocol Support:

  • Airspy
  • Airspy HF+
  • HackRF
  • PlutoSDR (network only)
  • RFspace
  • RTL-SDR
  • RTL-TCP
  • SDR++ Server
  • SpyServer

In any case, I'd love to get some feedback on it, so feel free to try it out and let me know!

Download Here:https://drive.google.com/file/d/1Z2HPG8RQt8QXsznAq85oewb6TI1lKaL3/view?usp=sharing

PS: If you like this work, feel free to support me on Patreon, since putting it on the App Store won't be cheap and I want to make sure it's completely free with no ads!

SDR++ Android App Screenshot. Credit: goscickiw https://github.com/AlexandreRouma/SDRPlusPlus/discussions/703

SignalsEverywhere: Setting up and using SDR++ Server

On this weeks SignalsEverywhere episode, Sarah demonstrates and shows us how to use the SDR++ Server, which was released as a beta earlier this year. SDR++ Server is similar to software like rtl_tcp, and Spyserver as it allows us to connect to a remote networked SDR like an RTL-SDR. Compared to rtl_tcp and Spyserver however, SDR++ Server has a huge advantage in that it is compatible with almost any SDR, and enables the full range of control options for RTL-SDRs.

In the video Sarah shows us how to activate the SDR++ server module and how to connect to a remote RTL-SDR running the SDR++ server on a Raspberry Pi. She goes on to show how to connect to other SDRs running on the Raspberry Pi as well, such as the SDRplay RSP Duo, LimeSDR, Airspy R2 and Airspy HF+ Discovery. Finally she goes on to show how to set up the server on Windows and a Raspberry Pi.

SDR++ Server | Remote RTL-SDR SDRPlay LimeSDR AirSpy and More! | Raspberry Pi and Windows Setup Tut