Category Archives: Construction

A detailed look at three different methods of operating the low power WSPR mode

There seems to have been an upsurge in people operating WSPR recently.  Barely a day goes by (sometimes barely an hour) without someone posting a map of where their signals have been received on Twitter.  When I first started experimenting … Continue reading

Posted in Amateur radio, Construction, Data, HF, WSPR | Tagged , , , , | 6 Comments

Installing a new external ADS-B receiver

Not long after my last post on this subject, back in January, the preamp I had mounted in the box at the top of 30ft of pole strapped to the side of my house failed and I was forced to … Continue reading

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Returning to data modes after an enforced break

My shack computer is an Apple iMac.  For a few years, I’ve operated a lot of data modes and been very successful in data contests.  I’ve always enjoyed data modes and in 2012 I operated GO6NHU to celebrate the London 2012 Olympics … Continue reading

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Building a Raspberry Pi internet watchdog

I wasn’t sure whether to post this or not as it’s not specifically amateur radio – But there’s a small amount of electronics involved so I figured it might be of interest. A few days ago while Susan and I … Continue reading

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How to replace the noisy fan in an Icom ID-5100 with a much quieter one

I’m a happy owner of two Icom ID-5100 radios, one is mounted in the car and I use the other one in the shack on low power for working the local repeaters.  It doesn’t get much use but I’m monitoring GB3CL … Continue reading

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5B4AGN bandpass filters – The measurements

I’ve been moving some boxes around recently and I unpacked the bandpass filters I built for one of the Martello Tower Group DXpeditions and successfully used again during our activation of the MV Ross Revenge in August 2016. It struck me … Continue reading

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ADS-B setups – Comparing internal and external aerials

Following on from my last update, I’ve spent a fair bit of time experimenting with two very different ADS-B aerial configurations.  I have two Raspberry Pi3s, both running identical software and exactly the same receivers, the FlightAware Pro Stick Plus which … Continue reading

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