here's some unusual electrical components. these are tone reeds. they're used in older radio equipment, such as public safety radios and ham radios. they are used to send or receive CTCSS tones. let's take one apart!pic.twitter.com/rgWOvnv2VZ
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nowadays radios generate the tones digitally instead of using an actual, physical resonator. you can pick a wide variety of frequencies and you don't have to swap out the tone reed modules.
here's the motorola datasheet, surprisingly still hosted on their website. https://www.motorolasolutions.com/content/dam/msi/docs/en-xw/static_files/Related_-_Vibrasender_and_Vibrasponder_devices.pdf …
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