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Buzen's avatar

I don’t think it’s correct to say that AM radios interfere with EV systems. A radio receiver doesn’t emit much electromagnetic radiation (a minimal amount from the heterodyne oscillator) and there isn’t a difference between AM and FM in this regard.

The actual issue is that the EV systems instead interfere with the AM radio reception. AM uses lower frequencies than FM and the audio is encoded in differences in amplitude rather than frequency. The power controllers, transformers and AC motors in an EV generate high levels of EM radiation at the frequencies they operate at and the frequencies are in the lower AM bands, rather than the higher ones used by FM. Since this radiation is additive it will cause static on AM audio output.

In order to eliminate this static either the radio would have to be redesigned with more shielding or the EV power systems would have to be likewise redesigned to reduce emissions at particular frequencies or add heavy shielding around components, which raise cost for minuscule benefit. Politicians shouldn’t be making engineering decisions.

Zac Hill's avatar

How much of the Anglosphere phenomenon involves broad expectations of higher salaries that in turn lead to higher-variance paces of churn, do you think? In other words even if grant size scales with payroll, the absolute costs of asymmetry (and thereby variation) are higher and thereby can feel more fraught?

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