Kevin McCarthy
12-02-07, 05:05 PM
I am new to satellite TV and this is my second post. My questions follow this context. I was really looking forward to switching from Comcast to Direct TV, to feed my new HD video systems (JVC 65S998 rear projection TV, wall-mounted behind a drop-down, 100" DaLite High Power screen with a JVC RS-1 front projector). The install was to have taken place last Monday. I had to be on travel, so my wife met the guy. He told me by phone that the install was a no-go, due to 119, and that I would have to cut 5-6 trees for a roof mount. Over the phone, I challenged him to test the back yard. He claimed that this also wouldn't cut it, and would require removing ~2 trees, both big, and near the house / power lines. Since I couldn't be there to see what he was doing, I lashed together an improvised inclinometer system (pictures attached). It consists of a tripod with a pan/tip/tilt head, a 1" x 2" x 20" board with two screw eyes for sighting, a small board screwed to the long board that accepts a rotatable compass on a rectangular plate (this references the edge of the long board), and an inclinometer that I glued to the tripod head. I went out in the light that was left this afternoon, and I found what seems to be a very clear shot to all five satellites in one corner of the yard, which would not require any trees to be removed. It was about 120' behind the house. I did see his dowel where he found a problem, but it was much closer to the house - ~55 feet. I am not sure why he stopped where he did. The angles get better and better the further back the dish would be mounted. I could site the dish a bit forward of my ideal position; it would be more obvious visually, but ~ 100 feet would be an OK compromise between satellite sight lines and unobtrusiveness. The pole could be very low.
OK, so here are my questions:
1. I think I need to see the following five satellites: 99, 101, 103, 110, and 119, for a 5LNB dish. Is this correct?
2. At my location (+42.820, -71.086), My use of websites indicates that the alt-az of the five satellites are: 99:33.1, 232.6; 101:32.0, 235.2; 103:31.1, 237.2; 110:27.1, 244.6; 119:21.4, 253.2. He had the 119 altitude a bit lower, at "20 degrees". Are my values correct?
3. How far behind the house can the dish be located? The receiver would require no lateral shift, and be about 15 feet into the house from the entry. Was his choice of a point 55 feet behind the house closer than it needs to be? How far can I go? Apparently there is some box that needs to go within a certain distance of the dish. Can it be thought of as simply a lump in the cable, located where it needs to be but not otherwise affecting the dish to house distance?
4. It is getting cold fast. Could they lay the line (possibly including the amplifier lump) on the surface, and dig a trench in the spring, or do they need to trench it from the get-go? Does the imminence of ground freezing pose a problem?
Any feedback and guidance would be very helpful.
Kevin McCarthy
OK, so here are my questions:
1. I think I need to see the following five satellites: 99, 101, 103, 110, and 119, for a 5LNB dish. Is this correct?
2. At my location (+42.820, -71.086), My use of websites indicates that the alt-az of the five satellites are: 99:33.1, 232.6; 101:32.0, 235.2; 103:31.1, 237.2; 110:27.1, 244.6; 119:21.4, 253.2. He had the 119 altitude a bit lower, at "20 degrees". Are my values correct?
3. How far behind the house can the dish be located? The receiver would require no lateral shift, and be about 15 feet into the house from the entry. Was his choice of a point 55 feet behind the house closer than it needs to be? How far can I go? Apparently there is some box that needs to go within a certain distance of the dish. Can it be thought of as simply a lump in the cable, located where it needs to be but not otherwise affecting the dish to house distance?
4. It is getting cold fast. Could they lay the line (possibly including the amplifier lump) on the surface, and dig a trench in the spring, or do they need to trench it from the get-go? Does the imminence of ground freezing pose a problem?
Any feedback and guidance would be very helpful.
Kevin McCarthy