Jouni OH3CUF<p>As the HF propagation is so crappy, I went to search for old radiosondes. Found one, which had been on the ground for year. It was quite degraded, birds must have borrowed the styrofoam.</p><p>To my surprising the PCB was 100% intact, like a new one. Not a single dot of corrosion. Balloon how ever was turned into this paper like very brittle material.</p><p>Serial V4550014.</p><p><a href="https://mastodon.radio/tags/radiosonde" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>radiosonde</span></a> <a href="https://mastodon.radio/tags/sonde" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sonde</span></a> <a href="https://mastodon.radio/tags/weatherballoon" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>weatherballoon</span></a> <a href="https://mastodon.radio/tags/hab" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>hab</span></a> <a href="https://mastodon.radio/tags/highaltitude" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>highaltitude</span></a></p>