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Buck regulator RF noise worries amateur radio operators

Original: Buck regulators work by switching a MOSFET on and off at high frequency, which makes RF noise. The noise harmonics can l

Electronics enthusiasts are discussing how buck converters switch a MOSFET at high frequency, generating RF noise whose harmonics can fall directly inside amateur radio bands. The conversation covers searching for switching regulators whose frequencies avoid these bands, noting that low-frequency alternatives require larger and more expensive components.

Why now: Hobbyists and radio operators regularly grapple with switching-regulator interference in receivers, making this a practical topic of debate

buck regulatorsMOSFETamateur radio

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Evidence

• Buck regulators work by switching a MOSFET on and off at high frequency, which makes RF noise. The noise harmonics can land right in the amateur radio bands. I'm searching for regulators with a switching frequency outside this bands (low-frequency ones need bigger, pricier… · roos@tooting.ch · 2

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