Multi LNB Set up on a Sky Dish

[Ferret]

I just tweaked the elevation and nova sport 2 is now up to 72%.

I'm going to order those bigger wing nuts today, hopefully those and a new lnb add a couple more percentage points.

Excellent that looks like a result.

Now send it to say 42e you should be getting on the Viark high 70s . When you get there flex the dish slightly up and down same at say 30w if you can improve on the signal by flexing the dish you not tracking the arc at optimum. Record if you flex dish left right or up and down to improve signal and let us know.

 

[Offtensive]

I’ve done a few tests today.

At 30W I moved the dish from side to side using the east west button and there was no change in signal. But when I decrease the elevation there’s a remarkable increase in signal quality.

For the eastern sats, I’ve only set it up to go as far 23.5E. It can get 28E but I’m using my zone 1 for that, and anything beyond that I don’t have line of sight for. For the strongest transponder I can increase signal quality by about 3db by increasing the elevation of the dish.

Is it a case of adjusting the elevation on the motor?

edit: updated findings for 23.5e

 

[ozumo]

It sounds like the dish isn't centred correctly on the motor. If the dish is tracking high on the western sats and low on the east it suggests the whole motor needs to be rotated a little east on the pole. Then reposition the dish on the motor stub to compensate.

 

[Offtensive]

It sounds like the dish isn't centred correctly on then motor. If the dish is tracking high on the western sats and low on the east it suggests the whole motor needs to be rotated a little east on the pole. Then reposition the dish on the motor stub to compensate.

Thanks. The dish does look slightly out of line on the motor (1st pic).

Is the height I’ve mounted it suitable or should I move that up too?

 

[ozumo]

Put a mark on the middle of the bracket edge and line it up with the join/mould line on the motor stub. A little bit higher would give a tiny bit of extra clearance but otherwise there's no difference. Then rotate the motor assembly on the pole to maximise signal.

 

[Ferret]

Thanks. The dish does look slightly out of line on the motor (1st pic).

Is the height I’ve mounted it suitable or should I move that up too?

It is way out on the first pic get that central, the motor stub central line should be central in the window/hole of the dish clamp then send the dish to 0.8w. Now loosen the motor to mounting pole clamps and move the whole motor assembly left to right to max the signal out on 0.8w and then tighten the clamps evenly making sure you dont loose signal. Then max signal out via dish elevation.

 

[dene]

afternoon all great thread probably a very long time since i logged in,
got to move into a bungalow just waiting on a few bits to be sorted level access enterance wet room etc (health issues) going to try and set up a sky zone2 dish up for astra1 and 2. i have a fta box and a freesat 4kbox got a wideband lnb for freesat and a standard quad for astra1 going to try and set the dish up on astra2 and bodge the other lnb for astra1 at side of the wideband lnb - had a quick try stood outside holding the quad at side of the wideband set up on astra2 no joy gave up after 10 mins its very very cold today - my present dish for astra1-hotbird is at head height on the back garden so had a play with that. the bungalow has a old sky zone 1 dish single lnb out so that pole/mount will do the put the zone2 dish on. not 100% sure if a zone2 is the minimum, size ill need, not sure if a 80-90cm dish would look ok. bonus on the bungalow i can get a few more satellites here im stuck with astra1-2 and hotbird due to walls trees. bungalow location looks good round to 42E and more and other way satellites below 13E checked a few lnb brackets out for mounting 2 lnb on a dish theres a few various designs do they all work .
Regards Chris

 

[rolfw]

afternoon all great thread probably a very long time since i logged in,
got to move into a bungalow just waiting on a few bits to be sorted level access enterance wet room etc (health issues) going to try and set up a sky zone2 dish up for astra1 and 2. i have a fta box and a freesat 4kbox got a wideband lnb for freesat and a standard quad for astra1 going to try and set the dish up on astra2 and bodge the other lnb for astra1 at side of the wideband lnb - had a quick try stood outside holding the quad at side of the wideband set up on astra2 no joy gave up after 10 mins its very very cold today - my present dish for astra1-hotbird is at head height on the back garden so had a play with that. the bungalow has a old sky zone 1 dish single lnb out so that pole/mount will do the put the zone2 dish on. not 100% sure if a zone2 is the minimum, size ill need, not sure if a 80-90cm dish would look ok. bonus on the bungalow i can get a few more satellites here im stuck with astra1-2 and hotbird due to walls trees. bungalow location looks good round to 42E and more and other way satellites below 13E checked a few lnb brackets out for mounting 2 lnb on a dish theres a few various designs do they all work .
Regards Chris

You should be able to pull in something, although holding it in position for testing may be difficult. I've got a couple of zone two dishes in the wild with two LNBs for Astras 1 and 2 working well, but i'm down south. Position to hold the Astra 2 LNB, to the West of ther Astra 1 LNB and a little higher, the reason I mention that, is that one of my customers was convinced that it had to be on the Eastern side because the satellite was, but hadn't taken into account the dish is a reflector.

 

[ozumo]

I'm further north than dene and have a zone 2 pointing at 28.2°E with an offset 19.2°E LNB. Despite being offset some of the transponders are stronger than Europe beam TPs from 28.2°E, all have good rain margin.

 

[gdf68]

Hi guys unsure if to create a new topic as this thread moved off multi lnb to motor , but here goes , got a zone 2 gladly donated from @Gladstones and trying to setup using a technomate multi lnb holder.
28.2 19.2(c) 13.0. Pole is plumb and maxed out SNR on 19.2 , technomate bar is attached to the lnb centred on the dish arm see pics , SNR for 28 2 spot on 70-90+ 19 70+ , 13e is 47 to 70 max. I've tried various lnb and this is the best combo see pic. I'm trying to get a better SNR on 13 is my mine aim

Anything wrong in my setup

Pics too large ,

 

[Analoguesat]

You will struggle with some 13E frequencies on a Sky dish. In the Scottish Borders I need a 90cm/1m dish to get all of them with a decent rain margin. Anything smaller & some of the frequencies are marginal at the best of times, never mind in a good Scottish downpour.

Sky dishes are difficult to get the lnb skew (twist) set correctly too away from 28E.

 

[gdf68]

Thanks am in the NW , so apart from may be having another tweak possibly moving the collars around and looking at the pics the bar looks like it needs to be more left of center , it currently aligned up on the center hole of the bar , other than that does it look ok

 

[a33]

Multifeedrail angle against the horizontal should be about -15 degrees, for about LAT=57N, LON=5.5W in NW GB.
(Or are you in NW England, Liverpool?)

I'd check rail skew first, and then fine-adjust by sliding along the rail.

Greetz,
A33

 

[gdf68]

Multifeedrail angle against the horizontal should be about -15 degrees, for about LAT=57N, LON=5.5W in NW GB.
(Or are you in NW England, Liverpool?)

I'd check rail skew first, and then fine-adjust by sliding along the rail.

Greetz,
A33

Yeah I'm in Liverpool , thanks any possibility anyone knows what max SNR I am looking at for 13 , obviously it's going to vary on weak and strong TP but an idea would be appreciated

 

[Offtensive]

Have you tried putting 13e at the centre, to see what maximum values you can get on that dish at your location?

 

[a33]

Yeah I'm in Liverpool , thanks

Then it's -15.6 degrees.
(measured in the plane at the backside of the LNBs, so perpendicular to the looking direction of the LNBs)

With 13E central, the multifeed skew angle would be -12.4 degrees.

Greetz,
A33

 

[gdf68]

Have you tried putting 13e at the centre, to see what maximum values you can get on that dish at your location?

Cheers I'll try that,