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Thread ID: 50069	2004-10-09 11:24:00	Antennas and Leakage	Growly (6)	Press F1

Post ID	Timestamp	Content	User
279561	2004-10-09 21:31:00	what sort of tiles ? you have to be very carefull with some types of tiles.	tweak'e (174)
279562	2004-10-09 21:38:00	tiles different story you dont wanna break em.............try finding some wood even if it's at the end of the housem over the edge or even just use somewhere on the wall, so long as it's high enuf to get a line of sight with your friends house..........	drcspy (146)
279563	2004-10-09 21:54:00	Well you see our house has two levels of roof - so i was thinking of mounting it on the wall outside, between the two levels. Let me draw diagram: ________________ | | The top roof ^ | <-- Wall. I was thinking mounting it here.... on this wall. | ____________| ^^ Roof (this roof and the other roof are slanted, but i cant draw that :s) I should really take a picture - wait till i get that USB cable...	Growly (6)
279564	2004-10-09 21:55:00	OK that didn't come out right - wait till I get that cable...	Growly (6)
279565	2004-10-09 22:19:00	Buy a mast.	metla (154)
279566	2004-10-09 23:46:00	Can't agree more. With CI, you can at least see the line of fixing nails/screws which would then tell you where the beams underneath are. With tiles, I think they're held in place by concealed clips and you can't be sure. Tiles being brittle, do break; this may not happen during your installation but might when the mast pulls on the tile that does not have much "give". I can't see how you can screw into tiles the same way as you would on wood or iron without pre-drilling. You'd have to use a slightly bigger drill bit as well as the wrong size screwwould cause the tile to chip or crack. Perhaps the easiest way would be the J-mast previously suggested. These come in different sizes to suit. To fix onto a concrete wall, use dynabolts or concrete nails to afix a short piece of H2 or H3 treated wood. Then use ordinary screws to hold the mast in place onto the wood.	Tom McB (832)
279567	2004-10-10 09:46:00	there are many ways you can fix it to the roof or wall. if your tiles are metal then standard roof mount and stays is the easiest. if concrete type tiles then its a simple matter of drilling with a 5/16th croncrete drill bit through the tile to the wood (lift the tile up to see the wood) and use 115mm tek scews. clay tiles...get a pro they are soft, touchy and exspencive to replace. the problem with tiles is there is always a risk of cracking them. useing facia mount bracket is ok but you will need to stay it back to the roof otherwise the aerial will come off (and sometimes take the facia with it). wall mount, the easiest here would be a saterlite dish wall mount. make sure its screwed into the studs (or structal concrete) and the outside cladding can handle the weight (ie don't fix it to plastic cladding) if in doubt hire a professionall aerial installer. :-)	tweak'e (174)
279568	2004-10-10 17:40:00	Just a thought. My last house had a high pitch tile roof so I put the TV antenna inside the roofspace. I did this because I had a reasonably strong signal (the transmitter was only a few miles away) and TV antennas do not add to the landscape. Clay tiles do not shield the antenna. They may degrade the signal but in my case the reception was as good as I needed it. This was at least true for TV frequencies. I do not know how badly the tiles will attenuate the very much higher frequencies involved in the wifi link but if you are not working to extremes of distance it is qute possible that you could get away with an internally mounted dish. If you already own the equipment it will only take a little effort to test it before you go to effort of doing an external mount.	Raymondo (5284)
279569	2004-10-10 18:19:00	> Just a thought. > My last house had a high pitch tile roof so I put the > TV antenna inside the roofspace. I did this because I > had a reasonably strong signal (the transmitter was > only a few miles away) and TV antennas do not add to > the landscape. That is probably worth the effort of testing. D.	drb1 (4492)
279570	2004-10-10 20:24:00	>> Just a thought. >>My last house had a high pitch tile roof so I put the >> TV antenna inside the roofspace. I did this because I >> had a reasonably strong signal (the transmitter was >> only a few miles away) and TV antennas do not add to >> the landscape. >That is probably worth the effort of testing. If they are metal tiles, no go. And if they are clay, it will save you the trouble of looking out the window to see if it's raining. Antennas are a black art, and with microwaves (above 1 GHz) there is a lot more black than art. Basically, if you want a low grade result, do a low grade job. Antennas that move in the wind are not much good at higher frequencies. For sealing, use lots of rtv under the bracket, and where the cable enters the building, ensure you put a "drip loop" (NOT a circle of politicians) where the cable comes down from the aerial, then up again (under shelter if possible) to go through the wall. This way rain drips off the bottom of the loop. Avoid sharp corners with the coaxial cable, and don't let it get squashed anywhere. If ANY water gets into a coax cable, it is no use as an antenna cable again, and useful coax at these frequencies is expensive. Have fun.	R2x1 (4628)
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