On Thu, 27 Mar 2025 17:18:54 -0400, shawn
<nanoflower@notforg.m.a.i.l.com> wrote:

Because of the strength of the signal and the way signals travel. The
AM signal at night can travel much further than it can during the day
and those daylight only stations were likely on a frequency that
interfered with another station at night, but not during the day.

The biggest AM radio station in Vancouver, BC recently switched its
frequency from 980 to 730 (which had formerly been owned by a rock n
roll station that had fallen on hard times) as they claimed the signal transmission was far better in the downtown area.

https://vancouversun.com/news/vancouvers-980-cknw-switches-better-signal#:~:text=Article%20content-,Starting%20Feb.,than%20the%20sometimes%2Dspotty%20980.&text=CKNW%20host%20Simi%20Sara%20announced%20the%20news%20on%20her%20show%20Monday.

I don't understand the technical aspects of why that might be but
given the cost of switching frequencies presumably they had worked out
the technical details.

I regularly listen to them at home but there it's usually via the net.

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On Thu, 27 Mar 2025 18:02:06 -0400, Rhino
<no_offline_contact@example.com> wrote:

I remember that happening when my family would go to the beach (on the >Canadian side of Lake Huron) 50 odd years ago. As it got toward
twilight, we started getting certain radio signals very strongly that we >hadn't been able to get in the afternoon. I still remember listening to
and enjoying a station from Fort Wayne. I wasn't even sure where Fort
Wayne was at the time but knew it was a lot farther than the "local"
stations from Canada, like those in the Windsor/Detroit area.

We live fairly high up the hill in Vancouver and regularly get KGO San Francisco after dark during the summer months. "Skip" is a wonderful
thing - and there obviously isn't water between SF and Vancouver.

(Back in the 70s I used to do CB radio and my friends and I used to
drive up to a local lookout and pretend to be transmitting from far
away)

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