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piggycd5
5-Jul-2014, 9:16 PM
I have been using a roof top antenna the past 2 years at our vacation home at the Jersey shore. Recently on several occassions I have lost the reception of the channels that I get on a regular basis whwere the transmitters are no more than 40 miles away and have been picking up channels that are between 300 to 400 miles away. This has happened 3 times in the past 6 weeks. Has anyone else ever have an experience like this. Could Sun Spot Activity be causing this? It happens usually late evening and last 6 to 7 hours.

ADTech
5-Jul-2014, 10:22 PM
No, it's not due to sunspots.

It's a phenomenon called "tropospheric ducting". https://www.google.com/search?q=tropospheric+ducting&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a&channel=sb

piggycd5
5-Jul-2014, 11:37 PM
THank you that makes complete sense now