Multi LNB Set up on a Sky Dish

[jeallen01]

The 2" ones (or similar car exhaust clamps from your local car parts factor, and which may be cheaper!) - the V bolts are usually used for clamping motor to poles..

 

[Offtensive]

Motor on pole, THEN dish on motor (otherwise the additional weight/size of the dish makes the job a LOT harder)!

PS: the motor "may" (= "will") want to slip down the pole as you adjust the azimuth (direction) so use the well-proven tip of puting jubilee clips around the pole just below it - see photo

View attachment 135967

To overcome this issue of the motor slipping down, could I put it on top of one of the brackets?

I’m planning to use 2 K brackets for that extra bit of stability. As I need to buy them in TK sets, I could use one of the spare Ts and go for a KTK setup and have the motor sitting on top of the T - would this be viable or am I just asking for trouble?

 

[jeallen01]

To overcome this issue of the motor slipping down, could I put it on top of one of the brackets?

I’m planning to use 2 K brackets for that extra bit of stability. As I need to buy them in TK sets, I could use one of the spare Ts and go for a KTK setup and have the motor sitting on top of the T - would this be viable or am I just asking for trouble?

Mounting the motor "on top of one of those brackets" will make it more difficult for you to adjust the motor azimuth because the bracket may "get in the way" of you swivelling it on the pole.

OTOH the "jubilee clip method" means you can fit the motor pretty much wherever you want on the pole, and is the widely "tried and tested" approach because it just "works"!

 

[Offtensive]

Mounting the motor "on top of one of those brackets" will make it more difficult for you to adjust the motor azimuth because the bracket may "get in the way" of you swivelling it on the pole.

OTOH the "jubilee clip method" means you can fit the motor pretty much wherever you want on the pole, and is the widely "tried and tested" approach because it just "works"!

Thanks, I was wondering why I had never seen that kind of set up.

Am I correct in saying you are using one of these?

https://cpc.farnell.com/unbranded/268/hose-clips-size-2-40-50mm/dp/CP03017?mckv=sUjHxmBOG_dc%7Cpcrid%7C224685952259%7Ckword%7C%7Cmatch%7C%7Cplid%7C%7Cslid%7C%7Cproduct%7CCP03017%7Cpgrid%7C52699126931%7Cptaid%7Cpla-894293437843%7C&CMP=KNC-GUK-CPC-SHOPPING&s_kwcid=AL!5616!3!224685952259!!!network%7D!894293437843!&gclid=CjwKCAjwlYCHBhAQEiwA4K21m1dyYDTornQJXKHDntN7CtLqBuECwDvHtzoA82FidPidJHLVg2DpPBoCrx8QAvD_BwE

and this is on top of the jubilee clip?

2 Inch Aerial Mast Clamp Jaw

The SAC galvanised aerial mast clamp jaw bracket can be used to securely clamp and hold in place an alloy or steel aerial mast up to 2 inches in diameter (Model: AE4305)

connectec.uk

 

[jeallen01]

Thanks, I was wondering why I had never seen that kind of set up.

Am I correct in saying you are using one of these?

https://cpc.farnell.com/unbranded/268/hose-clips-size-2-40-50mm/dp/CP03017?mckv=sUjHxmBOG_dc%7Cpcrid%7C224685952259%7Ckword%7C%7Cmatch%7C%7Cplid%7C%7Cslid%7C%7Cproduct%7CCP03017%7Cpgrid%7C52699126931%7Cptaid%7Cpla-894293437843%7C&CMP=KNC-GUK-CPC-SHOPPING&s_kwcid=AL!5616!3!224685952259!!!network%7D!894293437843!&gclid=CjwKCAjwlYCHBhAQEiwA4K21m1dyYDTornQJXKHDntN7CtLqBuECwDvHtzoA82FidPidJHLVg2DpPBoCrx8QAvD_BwE

and this is on top of the jubilee clip?

2 Inch Aerial Mast Clamp Jaw

The SAC galvanised aerial mast clamp jaw bracket can be used to securely clamp and hold in place an alloy or steel aerial mast up to 2 inches in diameter (Model: AE4305)

connectec.uk

Any sort of jubillee clip of the right size will do - mine probably came from LIDL!

Ref the 2" mast clamp: NO, as I think understand I understand your "plan", you will be using those to secure the pole to the brackets - then fit the jubillee clip a suitable distance ABOVE the uppermost mast clamp on the top bracket, mount the motor so that it "sits" on top of the clip and that it will then be able to swing the dish without it fouling the top bracket.(or anything else!)

OTOH, you might still have to raise the motor to achieve the latter - if so, then relocate the jubillee clip upwards accordingly!!

 

[Offtensive]

- then fit the jubillee clip a suitable distance ABOVE the uppermost mast clamp on the top bracket, mount the motor so that it "sits" on top of the clip and that it will then be able to swing the dish without it fouling the top bracket.(or anything else!)

OTOH, you might still have to raise the motor to achieve the latter - if so, then relocate the jubillee clip upwards accordingly!!

So it's better to have the motor sitting above the top bracket rather than in between the two?

 

[jeallen01]

So it's better to have the motor sitting above the top bracket rather than in between the two?

"It all depends" on, maybe,:
- how high you need the dish to be to get the desired arc?
- how high the top of the pole is?
- how far the brackets are apart?
- how easy or difficult you think adjustments of the dish declination and elevation will be with the motor & dish in your chosen position?

TBH, it's about time for you stopped asking endless questions and actually got around to "doing something" about getting the pole installed on some brackets, fitting the motor to the pole and the dish to the motor, and then finding out what actually works, or does not, for yourself - after that, then you will know what issues remain to be resolved, and what few remaining questions you need to ask us for advice.

 

[Offtensive]

It’s my first time doing something like this, hence my endless questions, and I really appreciate the help I’ve been given.

 

[Gladstones]

"It all depends" on, maybe,:
- how high you need the dish to be to get the desired arc?
- how high the top of the pole is?
- how far the brackets are apart?
- how easy or difficult you think adjustments of the dish declination and elevation will be with the motor & dish in your chosen position?

TBH, it's about time for you stopped asking endless questions and actually got around to "doing something" about getting the pole installed on some brackets, fitting the motor to the pole and the dish to the motor, and then finding out what actually works, or does not, for yourself - after that, then you will know what issues remain to be resolved, and what few remaining questions you need to ask us for advice

Agreed.
The best way is to experiment and learn then you know what the best you can get from your hardware.

 

[jeallen01]

It’s my first time doing something like this, hence my endless questions, and I really appreciate the help I’ve been given.

We all have to start "somewhere", and the very first time I ever installed a sat dish of any sort was an H-H motorised 80cm dish ON THE ROOF ON THE FRONT BEDROOM BAY WINDOW of the house - that was in 1991 and the only advice I had found beforehand was from reading articles in "What Satellite" magazine, and that worked (albeit that I had bought the dish already mounted & prealigned on the motor)!

Therefore it "can be done", but you have to get on and attempt to do it to find out what works, or does not, in your situtation. Pretty much all the (many!) questions that you have asked have been, to a greater or lesser extent, answered in enough detail for you to make a good stab at getting it near-enough right first time - the rest you "make up as you go along" (like the rest of "life")!

 

[Offtensive]

Last pre install question (I promise), which size and length bolts do you recommend?

Its going it a wall which is one level of bricks and one level of breeze blocks.

It’s my first time doing something like this, hence my endless questions, and I really appreciate the help I’ve been given.

I mean I'm more of a desk jockey

 

[Channel Hopper]

Breeze blocks on the interior ? (Can never be too sure)

If so a set of 75mm bolts should be enough, as long as they are drilled into the bricks and not the mortar.

 

[mujek]

Do you think I could get away with the 3 degree separation on an 80x73cm dish with those amazon bullet lnbs? I think from memory I’ve seen posts of people with 23.5e and 19.2e on one dish, but it’s that extra degree lol.

No, I don't think that's possible. Even on a Fuba 850 it's not that easy to squeeze in LNBs to realise a couple of 3°/4° separations.

Here is my dish with LNBs receiving 19.2/16/13/9/4.8°E - note that 16° and 9° E are not aligned perfectly

 

[Offtensive]

Breeze blocks on the interior ? (Can never be too sure)

I'm assuming it is.

It's not the house, but rather a brick shed. Inside is plastered, so I can't really tell.

 

[jeallen01]

@Offtensive, I think you answered your own question - if you know it's brick on the outside then it is probably breeze on the inside; brick on the inside would be even better and stronger, but, as CH said, 75mm bolts should be quite adequate in either case.

 

[Offtensive]

If everything arrives, and depending on the weather, I will install this week.

The cable run will be about 15m. With about 3m underground/across the garden.

I can either run it under the patio slabs or under the grass. If I grab WF100, will that be ok on its own, or should I use some PVC flexible conduit for extra protection?

I will be running 3 cables side-by-side.

 

[jeallen01]

OK, I'll "bite" as this is a "new" type of question!

Personally I think I would use something like either:
- this plastic trunking which is in 2 parts and has a lid.https://www.screwfix.com/p/tower-upvc-white-mini-trunking-38mm-x-25mm-x-2m/95463
- or 25mm (don't think you would get 3x WF100 cables through anything smaller - even then it'll be a "tight fit") flexible steel conduit such as something like here Flexible Steel Conduit - Search Results | Screwfix.com

I'd definitely put it under the patio slabs as those should better protect it from damage (such as someone "forking" the grass to airate it) - also, it should be easier to access it later if you need to.

However, water WILL get inside the trunking/conduit unless it is well-sealed throughout the length AND where the cables enter/exit it.

 

[Offtensive]

OK, I'll "bite" as this is a "new" type of question!

If I were to just run the cable under the slaps naked, is it likely to get damaged? There’s about 9 slaps that it would go under, and these have very little footfall.

Am I right in saying that there’s no risk of fire/electric shock if I didn’t use any trunking/conduit?

 

[jeallen01]

PS: here's a couple of other ideas:
- when we had our conservatory built, I laid a 4m length (but it looks like you can only buy 1m lengths nowadays) of something like this 100mmx50mm "flat channel" under the conservatory floor (then it was screeded over) to take 4x sat cables from under the lounge floor to the garden.

If I were to just run the cable under the slaps naked, is it likely to get damaged? There’s about 9 slaps that it would go under, and these have very little footfall.

Am I right in saying that there’s no risk of fire/electric shock if I didn’t use any trunking/conduit?

Let's say "I wouldn't do that!" - not for "fire/shock" reasons but because bugs etc., might start "eating" it (as might rats or squirrels if they smell and find it)!

"Very little footfall" means that the soil under the slabs (they are "slabs", not "slaps" BTW!) won't fully compacted for a long time and might not be that stable -> loose soil -> bugs/rats -> see above!

Also, if you are going to lay 3x cables, then actually use 4x in case of "cable failure" &/or you might want to expand your sat system in future -> there's a spare cable ready for you to use - I later wished I'd done that as adding extra cables under the conservatory and lounge floors is pretty much impossible without taking those floors up!

 

[Offtensive]

I'll have a look around at different types of pipes/trunking and will probably cable it up at a later date.

I have also seen this type of cable. It does say 'direct burial' - but I guess even with that there is the risk of bugs etc eating away at it?

Direct Burial Low Loss TV Satellite Coax Cable 100M

Our direct burial underground coax cable for CCTV has an ultra tough HDPE sheath that is resistant to small rodents and other sources of damage (Model: SFX/100-DB-GRN-100) (EAN: 5056631500124)

connectec.uk