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examples/meshtastic/hardware/radio.htm
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<p>I used a soldering iron, a hot glue gun, a step drill bit, double sided tape.</p>
<br>
<h3>Antennas</h3>
<img src="swr.jpg" width=200>
<p>
A good antenna is crucial for the radio to function properly. A <a href="https://nanovna.com/" target="_blank">NanoVNA</a> is very helpful to test if an antenna is resonant at the specified frequency (otherwise it's useless). You can find good clones for about 50€/$ (beware of really cheap/bad clones).
</p>
<img src="swr.jpg" width=200>
<p>
Antennas listed in the <a href="https://store.rakwireless.com/products/" target="_blank">RAK store</a> are generally of good/industrial quality. Some other mass produced offerings are of such bad quality that I had to throw them away (after measuring them).
</p>