Tag: hardware
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Baofeng DM-32UV – DMR TX Audio
TLDR: Some versions of the Baofeng DM-32UV radio appear to have low TX audio levels even with the mic gain set to the max level (5). A new version of the firmware appears to resolve the matter but requires a bit of work on the behalf of owners. This post explains the background, steps taken…
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ADSB – Flight Tracking – Quick Links
1. Introduction I am currently running ADSB tracking software on a Raspberry Pi in my home office. This is connected to a dedicated antenna and feeds into a number of flight tracking services. All data is received direct from the aircraft and fed into the services such as FlightRadar24 and ADSB Exchange. At present,…
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FT8 – Transmitting
Background Following on from a post earlier this year, where I discussed reception of FT8 signals, I finally got around to transmitting on this mode in the last few days. As a quick reminder, FT8 is a digital mode for sending messages by radio and is particularly good at getting “through the noise”. For those not familiar,…
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Tracking Aircraft with an SDR
Introduction Given the recent US/China Balloon Incident it seems an opportune moment to discuss tracking aircraft with an SDR (Software Defined Radio) using the ADSB technology deployed in almost all commercial, private and military aircraft. Last night the US shot down the balloon which had crossed the continental US – in reality, a bizarre event – I do not…
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FT8 – Quick Intro
Introduction A few people have asked me about the amateur radio thing, “why” being the most frequent. I will touch on this in more detail as time goes on but in short, when I was a kid, I’d wonder, when looking at a normal FM radio, why does it start at 88? Why does it…