Path: ...!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: "Carlos E.R." Newsgroups: sci.electronics.design Subject: Re: AM radio law opposed by tech and auto industries is close to passing Date: Sat, 4 May 2024 12:26:15 +0200 Lines: 40 Message-ID: <73fhgkxdv5.ln2@Telcontar.valinor> References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: individual.net +5uVck4B51JEsf2dn5lnFADVlcemAgwIB2e/Cs6yNejTPUIRnk X-Orig-Path: Telcontar.valinor!not-for-mail Cancel-Lock: sha1:aduv+znPWKlHk/0Ei001huZiNno= sha256:L35pqwD2W08bAxZfNLGBYuPw3WrFfg435LfgbJiWe0M= User-Agent: Mozilla Thunderbird Content-Language: es-ES, en-CA In-Reply-To: Bytes: 2679 On 2024-05-03 00:32, Joe Gwinn wrote: > On Thu, 2 May 2024 08:28:35 +0200, "Carlos E.R." > wrote: > >> On 2024-05-02 07:24, Jan Panteltje wrote: >>> AM radio law opposed by tech and auto industries is close to passing >>> https://arstechnica.com/cars/2024/05/am-radio-is-a-lifeline-lawmakers-say-tech-and-auto-industries-disagree/ >>> A recent test of the emergency alert system found only 1 percent got it via AM. >>> >>> Strange. most is FM these days, or digital? >>> Something to do with Soros buying radio stations ;-) ? >>> >> >> You are talking of the USA? >> >> I would think that there are areas over there where FM in cars does not >> work, and people have to use AM. >> >> It happens in Spain, which is far smaller, so surely it happens in the USA. > > It does happen in the US, particularly in rural areas and/or > mountainous areas, because the short-wave stuff (FM band and above, > including TV bands) is line of sight, while AM follows the ground over > the mountain into the valley, and so on. This effect is quite strong, > and many rural communities in valleys paid to have a repeater atop the > highest local mountain, to send the FM and TV signals down into the > valley. Which doesn't work so well from a car driving through the > mountains. > > I had a friend many years ago who lived in rural Virginia, and had the > valley problem, and some makes and models of car didn't have good > enough AM radios, and/or had too much interference from the ignition > system. I wonder if modern ignition is better than old for this. I mean, now there is a coil per plug, so that the distribution works at low voltage. -- Cheers, Carlos.