Had a great time capturing the 31 meter band for 3 hours this afternoon using my Pi Zero 2W portable recording contraption and AirSpy HF+ Discovery with the new firmware. Flawless baseband AGC despite a very hot antenna (2x6m dipole) AND the HF preamp being on. #PortableSDR #SDR #Shortwave
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London Shortwave<p>The PiZero 2W spectrum recorder runs for 7 hours on two 18650s & a step-down 5V converter (which doesn’t seem to add measurable noise on HF). And of course the batteries are hot-swappable as the unit has its own small UPS battery. The only limitation is the amount of free space on the MicroSD card 📡<a href="https://mastodon.radio/tags/PortableSDR" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PortableSDR</span></a> <a href="https://mastodon.radio/tags/SDR" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SDR</span></a> <a href="https://mastodon.radio/tags/HF" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>HF</span></a> <a href="https://mastodon.radio/tags/Shortwave" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Shortwave</span></a> <a href="https://mastodon.radio/tags/SpectrumCapture" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SpectrumCapture</span></a> <a href="https://mastodon.radio/tags/SpectrumRecording" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SpectrumRecording</span></a> <a href="https://mastodon.radio/tags/AirSpy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AirSpy</span></a></p>
London Shortwave<p>🇧🇷 Rádio Nacional da Amazônia on 04/12/24 at 2200z on 11780 kHz. Captured with the battery-powered Pi Zero 2W, AirSpy HF+ and 2x6m dipole in a local park. <a href="https://mastodon.radio/tags/PortableSDR" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PortableSDR</span></a> <a href="https://mastodon.radio/tags/SpectrumCapture" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SpectrumCapture</span></a> <a href="https://mastodon.radio/tags/Shortwave" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Shortwave</span></a> <a href="https://mastodon.radio/tags/HF" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>HF</span></a> <a href="https://mastodon.radio/tags/DX" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>DX</span></a> <a href="https://mastodon.radio/tags/AirSpy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AirSpy</span></a> <a href="https://mastodon.radio/tags/PiZero2W" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PiZero2W</span></a> <a href="https://mastodon.radio/tags/PiZero" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PiZero</span></a></p>
London Shortwave<p>1/4 Final version of the UI (for now). Battery indicator, remaining recording time available & the duration of the current recording (in hh:mm). The Pi boots into this UI and triggers airspyhf_rx to record with the selected parameters if a HF+ is connected. The screen has minimal 🔋 impact when sleeping.</p><p><a href="https://mastodon.radio/tags/SDR" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SDR</span></a> <a href="https://mastodon.radio/tags/HF" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>HF</span></a> <a href="https://mastodon.radio/tags/Shortwave" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Shortwave</span></a> <a href="https://mastodon.radio/tags/SpectrumRecording" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SpectrumRecording</span></a> <a href="https://mastodon.radio/tags/PortableSDR" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PortableSDR</span></a> <a href="https://mastodon.radio/tags/Mediumwave" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Mediumwave</span></a></p>
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