• Effective immediately we will be deleting, without notice, any negative threads or posts that deal with the use of encryption and streaming of scanner audio.

    We've noticed a huge increase in rants and negative posts that revolve around agencies going to encryption due to the broadcasting of scanner audio on the internet. It's now worn out and continues to be the same recycled rants. These rants hijack the threads and derail the conversation. They no longer have a place anywhere on this forum other than in the designated threads in the Rants forum in the Tavern.

    If you violate these guidelines your post will be deleted without notice and an infraction will be issued. We are not against discussion of this issue. You just need to do it in the right place. For example:
    https://forums.radioreference.com/rants/224104-official-thread-live-audio-feeds-scanners-wait-encryption.html

800 Skip??

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KR4BD

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Jul 6, 2001
Messages
562
Location
Lexington, KY
What you are experiencing is tropospheric ducting. This is where VHF/UHF signals will hug the curvature of the earth for up to several hundred miles. Lately, we have been experiencing a lot of ducting here in the mid-western states. Radio signals rarely "skip" and bounce off the ionosphere above 150 mHz.
 

nexus

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Aug 13, 2002
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Mississippi
Expect to see this type of thing in the evening as the earth begins to cool off, and the heat rises into the cold air it causes the ducting. Also early in the morning as the sun begins to warm things up... It all has to do with cold and hot air colliding with eachother. It's especially active when you're say in the middle of summer and a sudden cold front moves in from somewhere and brings the temps down into the 70's over a few hours period. You should be on the lookout for distant stations above 30 mhz.
 
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