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#WaveGuide

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C.<p>Got pulled down a rabbit hole learning about Schumann resonances, which are electromagnetic wave resonances in the atmosphere because the area between the earth's surface and the ionosphere acts as a spherical waveguide. The energy input is from lightning, which is practically continuous (50 strikes/s) when viewed worldwide. The fundamental frequency involved is 7.83 Hz, with various weaker harmonics above that.</p><p>How I got pulled into the rabbit hole...</p><p>Of *course* people are selling woo / magic / New Age B.S. around this stuff. But I'm sorry to say, your little trace-printed-on-a-PCB antenna supposedly broadcasting on this frequency to boost its "natural healing properties" is not going to be an effective radiator at sub-8 Hz, even if you turn it into a spiral to make it longer. The wavelength of the 7.83 Hz fundamental is ~38,000 km, so a basic quarter-wave antenna should be &gt;9000 km long...</p><p><a href="https://mindly.social/tags/woo" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>woo</span></a> <a href="https://mindly.social/tags/magic" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>magic</span></a> <a href="https://mindly.social/tags/NewAge" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NewAge</span></a> <a href="https://mindly.social/tags/crystals" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>crystals</span></a> <a href="https://mindly.social/tags/healing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>healing</span></a> <a href="https://mindly.social/tags/BS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>BS</span></a> <a href="https://mindly.social/tags/scam" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>scam</span></a> <a href="https://mindly.social/tags/RabbitHole" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>RabbitHole</span></a> <a href="https://mindly.social/tags/Schumann" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Schumann</span></a> <a href="https://mindly.social/tags/SchumannResonance" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SchumannResonance</span></a> <a href="https://mindly.social/tags/electromagnetic" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>electromagnetic</span></a> <a href="https://mindly.social/tags/ionosphere" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ionosphere</span></a> <a href="https://mindly.social/tags/waveguide" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>waveguide</span></a></p>
Chancerubbage<p>Ars Technica probably has the deepest details on these ‘normal’ AR glasses appearing at this winters CES, RayNeo x3 Pro. They are $1500.</p><p>It would be nice to see a YouTube video of them in action if that’s possible. Not sure how you can manipulate the projection optics to focus that near to the eye. A focus ‘set up’ routine?</p><p>Does Wikipedia have an article on ‘waveguide’?</p><p><a href="https://mastodon.social/tags/waveguide" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>waveguide</span></a> <a href="https://mastodon.social/tags/rayNeo" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>rayNeo</span></a> <a href="https://mastodon.social/tags/ARglasses" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ARglasses</span></a></p>
Jeanette C.<p>I love <a href="https://mastodon.social/tags/Csound" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Csound</span></a> to create playable instruments. <a href="https://mastodon.social/tags/PhysicalModelling" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PhysicalModelling</span></a> is fun and Csound is so powerful here.<br>Here's my <a href="https://mastodon.social/tags/Handpan" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Handpan</span></a> instrument <a href="http://juliencoder.de/sound/handpan-3.0.zip" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">http://</span><span class="ellipsis">juliencoder.de/sound/handpan-3</span><span class="invisible">.0.zip</span></a><br>Here's the handpan in a complete Csound physically modelled band:<br><a href="https://youtu.be/nnDppQ3tgfU" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">youtu.be/nnDppQ3tgfU</span><span class="invisible"></span></a><br>And here's the handpan in a <a href="https://mastodon.social/tags/Pop" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Pop</span></a> song with other hard- and softsynths and vocals:<br><a href="https://youtu.be/Q9ErBjaMTZM" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">youtu.be/Q9ErBjaMTZM</span><span class="invisible"></span></a><br><a href="https://mastodon.social/tags/SoundDesign" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SoundDesign</span></a> <a href="https://mastodon.social/tags/Synthesis" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Synthesis</span></a> <a href="https://mastodon.social/tags/Waveguide" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Waveguide</span></a> <a href="https://mastodon.social/tags/Resonator" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Resonator</span></a> <a href="https://mastodon.social/tags/Music" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Music</span></a> <a href="https://mastodon.social/tags/Ambisonics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Ambisonics</span></a></p>
Martin Herfurt :verified:<p>Mediocre <a href="https://teslapwners.club/tags/whisky" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>whisky</span></a> , but very good packaging! Smokehead <a href="https://teslapwners.club/tags/cantenna" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>cantenna</span></a> <a href="https://teslapwners.club/tags/2_4GHz" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>2_4GHz</span></a> <a href="https://teslapwners.club/tags/wifi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>wifi</span></a> <a href="https://teslapwners.club/tags/bluetooth" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>bluetooth</span></a> <a href="https://teslapwners.club/tags/waveguide" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>waveguide</span></a> <a href="https://teslapwners.club/tags/antenna" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>antenna</span></a></p>
ftg<p>Have any of you folks encountered thus type Soviet waveguide relay before?<br>Looking for:<br>A pinout for the connector<br>A datasheet with the specs for driving it<br>Connector type.<br>This is X-band based on the waveguide dimensions.</p><p><a href="https://mastodon.radio/tags/Waveguide" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Waveguide</span></a> <a href="https://mastodon.radio/tags/microwaves" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>microwaves</span></a> <a href="https://mastodon.radio/tags/amateurradio" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>amateurradio</span></a> <a href="https://mastodon.radio/tags/radio" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>radio</span></a> <a href="https://mastodon.radio/tags/Xband" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Xband</span></a> <a href="https://mastodon.radio/tags/10GHz" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>10GHz</span></a> <a href="https://mastodon.radio/tags/surplus" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>surplus</span></a></p>
GeekProjects News<p>The Waveguide Explanation You Wish You’d Had At School <a href="https://hackaday.com/2024/08/09/the-waveguide-explanation-you-wish-youd-had-at-school/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">hackaday.com/2024/08/09/the-wa</span><span class="invisible">veguide-explanation-you-wish-youd-had-at-school/</span></a> <a href="https://geekprojects.com/tags/transmissionline" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>transmissionline</span></a> <a href="https://geekprojects.com/tags/RadioHacks" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>RadioHacks</span></a> <a href="https://geekprojects.com/tags/microwave" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>microwave</span></a> <a href="https://geekprojects.com/tags/waveguide" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>waveguide</span></a></p>
Pyrzout :vm:<p>The Waveguide Explanation You Wish You’d Had At School <a href="https://hackaday.com/2024/08/09/the-waveguide-explanation-you-wish-youd-had-at-school/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">hackaday.com/2024/08/09/the-wa</span><span class="invisible">veguide-explanation-you-wish-youd-had-at-school/</span></a> <a href="https://social.skynetcloud.site/tags/transmissionline" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>transmissionline</span></a> <a href="https://social.skynetcloud.site/tags/RadioHacks" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>RadioHacks</span></a> <a href="https://social.skynetcloud.site/tags/microwave" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>microwave</span></a> <a href="https://social.skynetcloud.site/tags/waveguide" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>waveguide</span></a></p>
IT News<p>The Waveguide Explanation You Wish You’d Had At School - Anyone who has done an electronic engineering qualification will at some point hav... - <a href="https://hackaday.com/2024/08/09/the-waveguide-explanation-you-wish-youd-had-at-school/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">hackaday.com/2024/08/09/the-wa</span><span class="invisible">veguide-explanation-you-wish-youd-had-at-school/</span></a> <a href="https://schleuss.online/tags/transmissionline" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>transmissionline</span></a> <a href="https://schleuss.online/tags/radiohacks" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>radiohacks</span></a> <a href="https://schleuss.online/tags/microwave" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>microwave</span></a> <a href="https://schleuss.online/tags/waveguide" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>waveguide</span></a></p>
katch wreck<p>"The inherent stability of the <a href="https://mastodon.social/tags/terahertz" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>terahertz</span></a> beat frequency between the signal and idler fields of an optical parametric oscillator is transferred to a microwave frequency of a Kerr <a href="https://mastodon.social/tags/soliton" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>soliton</span></a> comb, and synchronization is achieved via a coupling <a href="https://mastodon.social/tags/waveguide" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>waveguide</span></a> without the need for electronic locking."</p><p><a href="https://www.nature.com/articles/s41586-024-07136-2" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">nature.com/articles/s41586-024</span><span class="invisible">-07136-2</span></a></p>
katch wreck<p>"We illustrate the potential of these concepts by fabricating <a href="https://mastodon.social/tags/nanostructures" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nanostructures</span></a> that are impossible to make with any other known method: <a href="https://mastodon.social/tags/waveguide" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>waveguide</span></a>-coupled high-Q silicon photonic cavities that confine telecom <a href="https://mastodon.social/tags/photons" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>photons</span></a> to 2 nm air gaps with an aspect ratio of 100, corresponding to mode volumes more than 100 times below the <a href="https://mastodon.social/tags/diffraction" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>diffraction</span></a> limit. Scanning transmission electron microscopy measurements confirm the ability to build devices with sub-nanometre dimensions."</p><p><a href="https://www.nature.com/articles/s41586-023-06736-8" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">nature.com/articles/s41586-023</span><span class="invisible">-06736-8</span></a></p>