Why? What, exactly, is so precious about the business model of the "web?" The whole thing is about 30 years old, and less than that for most people. Is there some reason that we can now tolerate no change here?

There was a world before the "web." It was pretty good too. There were catalogs and magazines and newspapers. I promise you can exist happily if the business model of the web is altered and all the things manifest in some new manner.

I'm not sure that's true for Google and Facebook, et al. What I am sure of is I give absolutely no fucks about how they feel about that. And you shouldn't either.

Ever actually tried that?

What actually happens is the bully talks to his bully friends and a few days later you get your ass curb stomped out of the blue.

Yes, this is about three main EV components: the inverter(s), the motor(s) and the high current conductors between them. SiC MOSFET technology, driven by the EV industry, has advanced a great deal recently, so now it's possible to switch high currents (hundreds of amps) with hard edges. That's great: it means better efficiency, performance, range, etc. It also means these EVs are EMI disasters.

Yes. They're using high power SiC MOSFETs to drive hard edges on hundreds of amps of current. When you cycle high current that hard you get harmonics far up the spectrum: it appears on an SA as literally dozens of peaks combing across the screen. That switching current is flowing through long conductors (read: antennas) to the motors.

You can't just wrap all this stuff in shielding because it's hot: you have to cool it, with air, circulating oils, whatever. Plus, the switching frequencies are constantly changing, up and down the spectrum as vehicle speed, battery charge level and everything else is changing, so there aren't any feasible filtering solutions.

These are seriously hard engineering problems and the manufacturers are pressed to meet all the performance and efficiency expectations, AND manage the EMI that is a natural, unavoidable consequence of these designs. So they're doing what any engineer does when they're struggling: shed requirements. Here that means delete AM because it's the first thing that exposes the EMI their spewing. You know this is true, because one of the arguments they make is that AM receivers will impact range. They don't mean the AM radio is somehow going to drain the battery (as many others have misinterpreted it.) They're pointing out that achieving the EMI control necessary to not rape the LW/MW spectrum will compromise their designs.

They have appointed some astonishingly stupid people in this is administration. Exactly what, pray tell, does Paul Dean have to bargain with here? Good will?

In diplomacy, you don't ask for things empty handed. When you do — and then your counterpart(s) laugh in your face — you are seen as weak and impotent. Is Mr. Dean prepared to close any trade doors for China? Is Mr. Dean offering to limit arms for Ukraine? Does he offer anything whatsoever, or is he just as fucking stupid as he appears to be?

AM radio frequencies range from 540 kHz up to 1700 kHz. A switching power supply operating at only 160 KHz has a 7th harmonic dead in the middle of the US AM band. Such power supplies operating at such frequencies are entirely commonplace in EVs.

You don't know what your talking about.

Why? Did he live in some universe with alternate laws of physics? If not then, you should know, the problem we're discussing is a bit more complex than perhaps you imagine. Bits of foil can't solve it.

The most recent legal act regarding this is Executive Order 13618 — Assignment of National Security and Emergency Preparedness Communications Functions July 6, 2012. Wherein, the federal government has the power to "satisfy priority communications requirements through the use of commercial, Government, and privately owned communications resources, when appropriate."

The US government has long anticipated that commercial systems might need to be employed for its own communication. The facts are that commercial systems are widespread, extremely robust and survivable systems.

True. The text of the bill says nothing about harmful interference. However, there is the implication that the receivers being mandated might actually work, and not just for the vehicle operator, but for the vehicle in the next lane as well. There are ample incumbent commercial interests and lawyers at hand that will be eager to attempt to convert that implication into a case.

The number of fucks you give about EBS isn't necessarily relevant. Given the sort of extreme conditions where one might actually need to use commercial broadcast equipment for emergency communication, that communication could be operational traffic among leaders, first responders, the military, etc., as opposed to public broadcasts.

The cheap simple methods don't cut it when your switching hundreds of amps to several motors located on the perimeter of the chassis. EMI in EVs is a whole different level of problem than conventional ICE vehicles that might have one or two much smaller EMI sources under the hood on the other side of a firewall.

No, they're not.

Controlling RF noise is hard. Especially when you're switching enough current to accelerate your four ton electric tank from 0-60 in 4-something seconds while you're saving the planet or whatever. Switching current generates RF. Basic physics. To prevent the RF noise you have compromise the design to avoid generating RF hash in the first place and/or shield things and provide low impedance paths for the noise. There various ways to do this, but all of them add something to the system, and that manifests as size and mass. Every gram of mass or cubic mm you use for one thing is a gram of mass or cubic mm you can't use for something else.

So they aren't actually lying. If the mandate is that the product can't just spew RF hash then the design will have to be compromised.

So part of the national emergency system in the US is built around AM radio. The reason for this is the behavior of radio waves at these frequencies. If, for instance, some large fraction of all communication infrastructure were wiped out, a small number of powerful AM radio stations could, with their output power at maximum and during nighttime hours, cover the entire continent with a signal that can be received by very simple, very low power receivers. This is a basic property of AM radio that's been understood for a hundred years now and the basis for certain regulatory decisions, like maintaining a select set of special, geographically distributed, high power AM radio stations across the US.

Unfortunately for car makers, which are either actively pursuing or being pushed into electric products, high power electric motors and their power supplies are hard (read: expensive) to keep quiet: they make a lot of RF noise, especially around the same frequencies as AM radio. So, rather than innovate or pass on these costs, the car makers just figure the easiest (read: most profitable, lowest cost) thing to do is take a giant shit all over the RF spectrum while selling their 8,000 lbs electric tanks.

They're also great at not LARPing as a hijab wearing pally and taking over HQ.

Yea, well, that band of fanatics are ... fanatical. You, poasting on the interwebs, aren't going to dislodge them. They've got their vision for this world and you're not in it. And I mean right now, not some terrible future. You don't matter. Your preferences, your ideas, your votes. None of it.