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this post was submitted on 08 Dec 2025
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So, I'm rusty on RF stuff, but the length of your cord should determine the frequency it's tuned in to. Simple solution is to plug in a cord extension and see if that helps. Or get technical and cut your cord a little shorter.
FM radio is very permissive when it comes to antenna length. I've listened to it on a screwdriver, a table, a Leatherman, and other bits and bobs. λ for a 100MHz wave is 3m, meaning that an ideal λ/4 antenna would be 75cm, despite much smaller receivers working. You can degrade the signal by making it smaller, but you'll still hear degraded/garbled NPR.
Shielding it is then!
I am indeed using quite a long cord, do you think the orientation matters as well?
Not if you're that close. But like another hexbear said, FM gets into everything. So you're going to want to use a filter, shielding, or switch to bluetooth. Your cord itself is the problem.