Originally Posted by mike734
Dan, could you please post a photo of the topographical map you are using to see this hill?
This is going to be long, but hang in there. If you get confused, it's probably my bad explanation. Easy to show this to someone live, not easy to explain. Kind of like trying to describe the taste of chocolate!
I don't have a photo, but this is a program I've used for years, Topo by DeLorme. It's not high tech CGI, but does give a fair look at the terrain relative to the path. I've enclosed two Word docs with a pasted screen shot each.
The first doc is in several parts. The left half is a 3D view, with the start point in red, your house. The orange stripe is the signal path to QA Hill, roughly SW. (I didn't try to show the whole thing, as once you're beyond two miles, it's line of sight, nothing else in the way.) You're looking South. The right half is the map view, which always has North at the top, so the path starts at the same red dot, and the orange stripe is now going down and to the left. The 3D view can oriented in any direction and at varying heights. I chose this view because it highlighted the hill near you more. The red cone in the left half is pointing to the top of the hill, near the intersection of NE 197th pl and 182nd ave NE. (I zoomed in to see the actual cross point, hard to see in this screen shot)
The actual elevation in feet above sea level may vary a bit, but I've found it to usually be pretty consistent. My start point for your house shows you at 370ft, the hill top at 463ft. If you have data that shows you at 405, that could be right. Check you source for the height at the intersection mentioned, and I would bet it's about an 80ft difference, at about a 1/4 mile away.
If you look at the very bottom of the first screen shot, it shows what the path looks like if you were to slice it, like a knife in cake, and view the path from the side. The left side says queen anne and zero miles. The right side says 15.76 miles, your house. The blue horizontal line indicates the top of the hill, 1/4 mile SW of you, and the vertical blue line shows the distance from QA Hill. It's not ultra accurate, but pretty close. Just to the right of this graph you see some numbers showing the elevation and linear distance (as the crow flies) from the start point, QA hill. It says 457 ft elevation and 15.45 miles. Again, this part of the program is less accurate than the upper halves. It changes rapidly with small cursor changes, so it's readout is less accurate.
All the up and down area in between the start and end point's are the high and low points of land along the signal path. It's hard to tell from this view that you're below the signal line. (Remember, TV signals do not bend over hills. Some engery does get dispersed, kind of like the glow of car headlights coming at you beyond a hill. You're working in the glow) If I were able to show you, while moving the cursor, you would see the elevation changing as I went along the path.
The second doc is from higher up, or zoomed out. In the left half you see the red cone is over the second hill top from you, at the intersection of NE 172nd pl and 159th Ave NE. The lower graph shows that hill top at 13.62 miles from start, or about 2 miles from you, and about 568 ft, roughly 200ft higher than your house, using my reference point of 370ft. (again, your source would probably show that intersection at 605ft) Thing is, even at two miles, it's still in the way.
Now the start point for signal from the tower is about 1000ft, so the signal travels to you at a tiny downward angle, not dead level like the blue line shows in the lower graph. That's a good thing. The left edge of the graph, above the queen anne title, shows the height of the blue line as 568ft. Imagine that start point being 1000ft. As the the blue line crosses the hill top at 13.62 miles away, it would probably be a bit lower than 200ft above your head.
However, this program doesn't show the trees or buildings. Having done many jobs around the area, I know there's a lot of very tall fir trees, most averaging 50ft. That's a lot of wood in the way, on two hill tops. That pretty much cancels out the advantage gained in height from the downward angle of signal.
Obviously it's not bothering you that much from your description of channels received. Experience tells me that you are obviously in a "sweet spot". With that little 4221, and everything else considered, it should be worse.
So, that's why I recomended NOT trying other locations.
Further, your tuner is doing a great job with what it's getting.
Now, the obvious question:
What tuner are you using?
If I totally lost you, sorry. Call me and maybe I can do a better job, live!
Mike734a.doc 241k . file
Mike734b.doc 320.5k . file