2 LNBs

marshlib

is it possible top put two lnbs on one dish

Mickha

Yes, I've seen a set up that has had 10-12 LNB's on one dish. You point your dish at the weakest of the satellites and fix the second LNB to pick up the stronger signal, it takes a little time getting it spot on, then you fit a Diseqc switch to alternate via your receiver.

wod

yes offset brackets are available for dishes to recieve more than one satellite

marshlib

thanks guys really appreciate it

johnwilliam1

i use a duall lnb for astra 19e and hotbird 13e, once you get used to doing it its easy.

VincentVega

I have a question that is simillar to this one if I may add it here. All of the dual LNB brackets I have seen state they are for either 19E and 13E or 19E and 28E but I have not seen any that are 28E and 13E. Basically I want to recieve sky digital and Hotbird. I get the general principal about the dual LNB etc but is it possible to recieve sky digital and Hotbird on the one dish andn would I point the dish at 28E and then use the offset arm for 13E or the other way around.

My system details are: Technosat 7655 2VA, Lenson 80cm dish, two LNB's, a Lenson offset arm for this dish and a Pace sky digital box, oh and also a DisecQ switch.

Thanks in advance, probably better to be armed with the info before I go up the ladder.

Excelling

I am using dual LNB to pick up Hotbird & Nilesat.
Works fine

spiney

The bset signal is received at the dish's "focus point", and there's only room to put one lnb in that exact position!

As you go further off-focus, the signal gets weaker (due to partial field cancellation from from out-of-phase radio waves), and then you need a larger dish to compensate for the reduced strength.

The brackets that allow multiple lnbs to be mounted on a single large dish are ok for receiving satellites 10-20 degrees off the main dish axis, but more than that and the signal gets very much weaker, so generally it's not worth bothering.

A diseqc motor shouldn't be that much more expensive than several lnbs and diseqc switches, although of course it all depends on your particular circumstances ......

VincentVega

Thanks for the info Spiney. I guess the difference between sky digital at 28°E and Hotbird at 13°E is about 15° so thats bang inbetween your 10°-20° suggested limit. I only want to receive these two satellites and having already had a motorised system that never really got used I dont see the point of installing another. Its not the cost just the hassle considering I will only flip between two sat's. The question I really asked was do I point the centre (prime) LNB at 28°E or 13°E as I have no idea which signal is stronger. I always thought they were about the same when receiving them in the UK anyway. As I say I have not actually started this yet, I put the dish up yesterday and found 28°E easily but the second LNB was faulty so I am getting it replaced today and embarking on the second LNB setup this afternoon.

rolfw

Point your dish at 13 East if you are using a single side offset bracket, if you are using a Triax dish with the triax 2 LNB bracket, the dish points somewhere between.

Below is a 70cm Raven Gemini with Eastern satellites offset Bracket, to receive Hotbird, Astra 19.2 and Astra 28.2.

Attached Images

dish02.jpg (40.1 KB, 57 views)

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noone04

Yes it's.
I have to Lbn in the same disk. One for Hotbird and another to Astra.
You need to buy a adapter for two Lnb.
This kind of situation it's used to receive two satelites that are located very near.

VincentVega

Well after a few hours up and down my ladder with my meter I can get Hotbird at 13°E and I can get Sky at 28°E but not together no matter what the meter says the digibox will not lock on to the Sky signal for any money when set up on the second LNB bracket. I cant be rsed with it any more so I have called the local sat shop and they will do it.

VincentVega

Just thought I would update that the satellite guy turned out and it appears there was nothing wrong with my install but Brymar sent me a dodgy DisecQ switch that only switches when it feels like it.

Phew....