Sharing sat signal between 2 houses

daphil

Following my recent post re loss of some transponders, the problem was traced to a huge tree behind my house. It would be very expensive to top this tree, (it's bordering two neighbours properties).
My next door neighbour however, is about to install a new dish and I was wondering if I could "piggyback" off this. He would have no objection and he seems to be outside the tree.
I think I read some where a long time age, that it was not a good idea to say put up a Quad LNB and then take two feeds each. Is this correct ?
Or could we put two seperate LNBs on the dish and use one each?

Thanks.
Dave

ei9go

Think it's bad practice because you may be joining the two houses earths together

Avns1s

daphil wrote: »

Following my recent post re loss of some transponders, the problem was traced to a huge tree behind my house. It would be very expensive to top this tree, (it's bordering two neighbours properties).
My next door neighbour however, is about to install a new dish and I was wondering if I could "piggyback" off this. He would have no objection and he seems to be outside the tree.
I think I read some where a long time age, that it was not a good idea to say put up a Quad LNB and then take two feeds each. Is this correct ?
Or could we put two seperate LNBs on the dish and use one each?

Thanks.
Dave

For the sake of a dish costing around €30, if it was me. I'd do it correctly and have a dish and LNB each.

daphil

Avns1s wrote: »

For the sake of a dish costing around €30, if it was me. I'd do it correctly and have a dish and LNB each.

I have a dish, but can not get a proper signal because of tree growth. Removing the tree (s), would be very expensive.
My neighbour's house is clear of the trees, he has no problem with an octo LNB also feeding my house, but he, not unreasonably, does not want a second dish on his chimney.
What is the story with joining the two houses earths together?
Thanks
Dave

Gerry Wicklow

Without knowing the specifics of the ESB network feeding both houses, it is difficult to advise. It is possible in rare or bizarre fault conditions to end up with 400 volts on your coax which would not do your house or equipment any good. To misquote Terry Pratchett "million-to-one chances crop up nine times out of ten." If you can get a reliable installer to look at it go ahead but I would not recommend it and definitely not as a DIY job.

daphil

Gerry Wicklow wrote: »

Without knowing the specifics of the ESB network feeding both houses, it is difficult to advise. It is possible in rare or bizarre fault conditions to end up with 400 volts on your coax which would not do your house or equipment any good. To misquote Terry Pratchett "million-to-one chances crop up nine times out of ten." If you can get a reliable installer to look at it go ahead but I would not recommend it and definitely not as a DIY job.

Thanks Gerry, Am cocooning in West Cork and the local installer said no problem. An installer back in Cork city said the same, but I thought I had read something ages ago about the "earth" issue.
Could I mount a second quad LNB on the neighbours dish. This would surely separate the two houses ?
Thanks
Dave

Gooey Looey

daphil wrote: »

Thanks Gerry, Am cocooning in West Cork and the local installer said no problem. An installer back in Cork city said the same, but I thought I had read something ages ago about the "earth" issue.
Could I mount a second quad LNB on the neighbours dish. This would surely separate the two houses ?
Thanks
Dave

Just put up your own dish on their wall. Do not join cables to their dish for safety reasons

The Cush

daphil wrote: »

but I thought I had read something ages ago about the "earth" issue.
Could I mount a second quad LNB on the neighbours dish. This would surely separate the two houses ?

Single LNB only possible for any satellite position, that's why we have quad, octo and quattro LNBs.

The issue about sharing dishes between properties is to do with different phases, one property could be using 400V 3 phase while the other using single phase, shouldn't be a problem if both properties are on single phase from the same supply.

daphil

Gooey Looey wrote: »

Just put up your own dish on their wall. Do not join cables to their dish for safety reasons

I can't do that. Two old country cottage, his chimney is the only place clear of the trees and he has just installed a sat dish there yesterday and he does not want a second, there would be very little room for it anyway.
Thanks
Dave

Gooey Looey

daphil wrote: »

I can't do that. Two old country cottage, his chimney is the only place clear of the trees and he has just installed a sat dish there yesterday and he does not want a second, there would be very little room for it anyway.
Thanks
Dave

You cannot point 2 LNBs at the same satellite without 2x dishes

Johnboy1951

Is there no location on your property where a dish would have uninterrupted line of sight to the satellite?

On the ground?
On a pole erected somewhere not too obvious?

Maybe a bit of tree lopping might be the best option ....... it might not cost as much as you think ......

Tony

That's really surprising as its bad practice from an electrical safety point of view. Public liability insurance and possibly house insurance will not cover you if any issue arises.

daphil wrote: »

Thanks Gerry, Am cocooning in West Cork and the local installer said no problem. An installer back in Cork city said the same,

TheChizler

You can get these fibre coverter kits for converting the satellite signal to optical, removes any worry about electrical potentials. You need to convert back to coax at your house and there's some fiddling around choosing frequencies so best for an installer to do it.

https://www.satworld.ie/global-invacom-fibre-irs-odu-32-kit-101720.html

The Cush

Johnboy1951 wrote: »

Maybe a bit of tree lopping might be the best option ....... it might not cost as much as you think ......

My brother was quoted €1,200 last month to top a tree to get LOS for wireless ISP, in the end they went with satellite broadband and put the money towards that.

winston_1

Tony wrote: »

That's really surprising as its bad practice from an electrical safety point of view. Public liability insurance and possibly house insurance will not cover you if any issue arises.

This so called issue is totally over rated. There is no more danger than there is with Virgin Media feeding 2 of more houses from their headend.

Just ensure the dish and LNB cables are earth bonded in each house.

recyclebin

Does the LNB not use an isolated regulated low voltage DC feed from the satellite box? Not sure how it could ever become live with the AC mains without a serious fault. Fuse would surely blow in the plug if this happened?