-------------RECEPTION, TV
 
> "Leonard Erickson" wrote to "Phil Marlowe"
> (04 Jul 03  02:37:08)
> --- on the topic of "RECEPTION, TV"
 
> -=> Quoting Phil Marlowe to Mike Ross <=-
 
> I just read something about the signal in winter
> can be some 6db stronger simply due to the lower
> radiation angle (wave front goes lower instead of
> off into space over your head). That's a big
> difference. Say you have a viewable 30db s/n and
> the signal drops by 6db in summer then you'll be
> receiving practically nothing watchable. So that
> explains it!
 
 Hey Mike, you're psychic! [g] Didn't your antenna
 recommendations for raising signal strength... I
 believe in a message of yours a few posts back...
 have stuff about how to get exactly that 6db
 increase. I gotta go back and check that.
 
 And thanks for all the input.
 
 LE> I and a friend are studying for a ham ticket.
 > Yes, temp & humdity *can* make a difference. With
 > the right combo., you can get a "duct" that caries
 > the signal places it wouldn't otherwise go.
 
> I caught AM 720Khz Pasto, (Bolivia?) one
> afternoon. It's a mountain city up around 7,000ft.
> The weather conditions were just perfect for ducting!
 
 LE> Basicly, under the right atmospheric
 > conditions, you can get a signal to bend around
 > the curve of the earth.
 
> That's the idea of lowering the radiation angle so
> it curves just so.
 
 LE> So to get the signal when conditions *aren't*
 > right, you need to have an antenna high enough to
 > be in "line of sight" of the station's antenna.
 
 LE> How far away are these stations? Any idea
 > where their *transmitters* are?
 
> About 80 miles apart more or less. The
> transponders are up in the Adairondacks and Blue
> Mountains of Vermont in various high spots. Am
> drawing a blank on which mountains right now
> though around Mt.Pellier, Saranac Lake,
> Plattsburg, Burlington, Lake Champlain area, etc.
 
> We receive a pretty good signal in Montreal proper.
> Mike
 
 Yep. In the wintertime I do. [g]
 

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