Path: csiph.com!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: rbowman Newsgroups: comp.os.linux.misc Subject: Re: Real-time OSs (Re: Microsoft Is Abandoning Windows 11 SE) Date: 17 Aug 2025 04:07:16 GMT Lines: 38 Message-ID: References: <106mke5$1di32$1@dont-email.me> <3rkmmlxplv.ln2@Telcontar.valinor> <107cipt$2g8mr$9@dont-email.me> <107ghmk$3j56j$4@dont-email.me> <107kfi2$d4vh$21@dont-email.me> <107kma2$d4vh$36@dont-email.me> <107kohu$ggm3$1@dont-email.me> <107p2sp$1gv4l$3@dont-email.me> <107pkgr$1k377$18@dont-email.me> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Trace: individual.net 6bnNF6x9f6iu2jq4KuY+Pgpng8+1CWa2XlG7rRro0M4L+lKQme Cancel-Lock: sha1:ww1lKluXvaWZbAK+PlgrsN6uifM= sha256:5fLS3lYxT3ooWdkZ8goHoF7PUnCNgdU5u8FMQS3z5uA= User-Agent: Pan/0.162 (Pokrosvk) Xref: csiph.com comp.os.linux.misc:71446 On Sat, 16 Aug 2025 10:54:35 +0100, The Natural Philosopher wrote: > Problem with AM is that as originally designed, it is low audio > bandwidth on low frequency RF. So its intrinsically crap for music. It's > better in the USA on wider channel spacing, but in Europe its unusable, > especially since the ADSL carriers are all over the LW and MW bands. > > Its main virtue is that it was back in the day a lot cheaper to build > receivers for, and the transmitters could be miles away and the signal > would get through. Sort of Propagation is a problem with the US 530-1610 kHz broadcast band. During the day atmospheric ionization kills the sky wave and the ground wave propagation distance is short enough that stations can be assigned frequencies that don't conflict. At night all bets are off when the sky wave kicks in. There are assigned clear channel frequencies that can run 50 kW, but may need to use directional antennas. Local stations on those frequencies either reduce power or go off the air at sunset. https://en.wikipedia.org/wiki/Clear-channel_station https://www.youtube.com/watch?v=WPTfIPHLUcw The Mexican stations have X series call signs and some of them were running 250 kW, and not very fussy. Get down near the border and you might 'hear it on the X' when it overloaded your Walkman headphones. When I was in southern AZ 20 miles from the border I built a highly directional AM antenna so I could listen to the Phoenix AM stations and null out the X. I was envious of one of the X DJs. He could roll the 'r' in 'radio' for seconds. Rrrrrrrrrrrrrradio. I never could roll the r's in German too well.