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Packet Radio with the Raspberry Pi

Packet Radio TNC with the Raspberry Pi The Pi plus a USB soundcard is all you need to get started with Packet Radio. Instead of using a dedicated hardware TNC, the Pi can be coaxed to do the hard work of managing the Packet protocol. Full instructions can be found on the WB2OSZ’z website at: […]

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Recover Damaged Mac HFS+ disk with Linux

A friend of mine recently set me a challenge to recover 2TB of photo files from a Mac external drive that had failed. Fortunately, it was the USB to SATA converter that failed, so I could extract the bare drive from the case and access it using a SATA docking station. Problem 1 – Accessing […]

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bhi ParaPro EQ20-DSP Sound file

The following audio files have been provided to support my reviews of the bhi ParaPro EQ200-DSP power amplifier with noise reduction and parametric filtering. The first recording shows an aeronautical VOLMET signal as folows: 0-20 seconds – Origian signal 20-40 seconds –  DSP Noise filter set to the mid position 40-60 seconds – DSP Noise filter […]

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Airspy – Spy Server – Useful scripts

I’ve had Spy Server working very successfully with the Pi 3 for a while now and have written a few time-saving scripts that others might find useful. These can be found in the zip file below. Here’s a quick run through their function:, and – These scripts automatically change the Spy Server […]

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Running SpyServer on a Raspberry Pi-3

NB: UPDATED 5th August 2017 – The following issues are fixed: Wi-Fi was unavailable after upgrading to Stretch. Reduced bandwidth option stuttering – fixed by a new version of Spy Server released 14/6/17 Changed the auto-run option to use /etc/rc.local and added an IP check and 30 second timeout. Installing SpyServer on a Raspberry Pi 3 […]

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137MHz Polar Orbiting Weather Satellites

In my Radio User Decode column I’ve been describing a receiving station for the NOAA polar orbiting weather satellites and in this post I’m including a few examples so you can see the station’s capabilities. All the images are taken directly from WXtoImg with no other enhancements. The station here comprises the following: QFH Antenna as […]

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QFH Antenna Mast Drilling Template

Bill Sykes and Bob Cobey have produced of the best home-build designs for a weather satellite antenna on their web site at: QFH Antenna. Their instructions are easy to follow and the result is a robust QFH antenna that is tuned for the centre of the 137MHz weather satellite band. The only problem I encountered was […]

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Using a ThermApp Camera with a Raspberry Pi-3

In this tutorial, I’ll show you how to install the software required to use the ThermApp thermal camera with the Pi. Once installed, you will be able to display thermal images using a standard video player such as VLC, mplayer, etc. Start with a fresh download of the latest Raspbian operating system. These instructions are based […]

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