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Multi feed dish

excollier

Does anyone have any thoughts on this dish set up as opposed to a Wave Frontier Torroidal? I am looking to receive Astra 2, Hotbird, Astra 1.

http://www.hm-sat-shop.de/en/antennen-wavefrontier/multibeam-sat-antenne-maximum-t85.html

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watty

It's a bit small for flexibility in Ireland.

I'd go with Triax 90/95 cm Dish (works for 9E to 28E in Mid west well) or Triax 110cm dish
Triax Offset LNB bar adaptor. (comes with four holders). Good up to about 22 degrees arc, if further out satellites are strong enough.

The Wavefrontier is for up to 45 degree arc with similar level on all LNBs.

That dish alleges 48 degree arc. Likely much poorer past 10 to 20 degrees arc.

Your spec of 13E to 28E is about 16 degree arc.

Any regular dish is progressively poorer gain as you move further from the prime focus.

That's why on mine I drilled a new mount hole about 1 LNB width over, to make 28E be extreme left as it's strongest.

My dish is pointed at 16E, then adaptor clipped in and thus Astra (19E) and Hotbird (13E) are about equal gain and close to full gain.

I'll be able to swap the ku 9E (near 100% quality) for a Ka 9E in May/June.

excollier

I had tried the Triax TD88, and multifeed bar, last year for 28e & 13e.
I could never strike a good balance for reliable reception from both, if I got one spot on the other was off or on the edge of break up.
I took it down and replaced with two 60cm and hey presto, perfect reception from both.
There doesn't seem to be enough "tilt" on the bar to get them spot on.
I don't understand what you mean by drilling an extra hole, the lnb holders slide along the bar.
Do you mean re-centering the bar?
I must try that some time, but it won't address the tilt angle of the bar.
Thanks for your thoughts on the dish I mentioned.
The Wavefrontier looks tempting from that site, (€160 with 4 lnb, diseqc switch and delivery!) I love tinkering with reception and dishes etc, but can't find anything worth watching, other than Freesat.

watty

Also you have to mount the bar still with inside curve facing dish, but with hole at bottom (different to assembly drawaing, which shows it at top. Just flip it endwise so curve is still same way!). Then it tilts enough.

the tilt is least if the main stations are due south. We are a lot more West than Germany (main market) so the assembly is "upside down" to get the extra tilt as you can see in the photo.

The hole is in the Middle. If you use that hole, then with 28.2E at one end, the dish is on 19.2E. Doing a new hole for the mount means dish can be at 16E for 28.2E at end of bar. Look at photo. Bar is no longer centred.

Note that TD88 is a little small for Donegal as signal drops as you move from centre of dish (prime focus). There are an infinite number of "offset" foci on an Centre or Offset feed Dish. Only one Prime focus (peak signal).

excollier

Thanks for that.
I get the focus ( offset and centre ) thing, but did not know about flipping the bar over. That's interesting. I see how your bar is off centre.
Seems as though I have a redundant TD88 then, drat. Taking up space in the garage
I will try these suggestions and see what happens.
Next thing is to learn how to set up a motorised dish.
No use, but fascinating to learn how. Now the business has gone it's become a time consuming hobby, but addictive!!

watty

PM Byte and see if he knows anyone that wants the TD88

It's a good dish.

excollier

Well, thanks Watty.
I tried your tip of turning the bar over on the Triax multifeed.
Got 28.2e and 13e perfectly on the TD88, set up on a tripod.
Haven't tried re-drilling yet to off centre it, but great results so far:D

watty

This is the problem with instructions written for German Market.

Monoblocs a case in point. The spacing is wrong for here. Monoblocs or Duo Feed LNBs are for specific satellites, in specific country for specific dish. You need adjustable LNBs.

Ross & B&Q have dishes where elevation doesn't go below 24 or 25 degrees without a little modification!

28.2E is 22.5 degree elevation in most of Ireland.
At 3 degrees East its 25 degrees. In Prague its nearly 30 Degrees.
19E or 13E in France/Germany is 26 to 29 degrees roughly.

FREETV

watty wrote: »

This is the problem with instructions written for German Market.

Monoblocs a case in point. The spacing is wrong for here. Monoblocs or Duo Feed LNBs are for specific satellites, in specific country for specific dish. You need adjustable LNBs.

Ross & B&Q have dishes where elevation doesn't go below 24 or 25 degrees without a little modification!

28.2E is 22.5 degree elevation in most of Ireland.
At 3 degrees East its 25 degrees. In Prague its nearly 30 Degrees.
19E or 13E in France/Germany is 26 to 29 degrees roughly.

Watty, what would be the elevation and azimuth angles approximately for Arabsat 26 degrees east and Hotbird 13 degrees east be in Dublin please? Also, I wrote in the Lidl sat system thread about how earlier something damaged one of the connections to my Comag dual LNB. Could it have been the box shorting it or I messing with the installation settings I wonder? I checked with different sat cable and it still doesn't work from that feed.

excollier

watty wrote: »

This is the problem with instructions written for German Market.

Monoblocs a case in point. The spacing is wrong for here. Monoblocs or Duo Feed LNBs are for specific satellites, in specific country for specific dish. You need adjustable LNBs.

Ross & B&Q have dishes where elevation doesn't go below 24 or 25 degrees without a little modification!

28.2E is 22.5 degree elevation in most of Ireland.
At 3 degrees East its 25 degrees. In Prague its nearly 30 Degrees.
19E or 13E in France/Germany is 26 to 29 degrees roughly.

Re. elevation.
I recently installed some Andrew ValuStar dishes.
These must have a weird offset angle, because trying to get the correct elevation for 13e on a pole mount, the 75cm dish lnb arm only just clears the pole, (ie the elbow of the arm was almost touching the pole) any further east, and I don't think T&K and/or a pole would be useable.
Granted they do come with a "bent" pole wall mount but useless if you want to be near parallel to the wall, not enough stand off. A separate "L" mount must be used with sufficient stand off.
The 1.2m I installed had almost ran out of forward tilt adjustment at 16e, I reckon trying to get anything further east for weak sats with that one would also be tricky.
Having said that, very good dishes.
So yes, dish types are important.
BTW Astra 2 is about 19.5 deg elevation in Donegal.

watty

FREETV wrote: »

Watty, what would be the elevation and azimuth angles approximately for Arabsat 26 degrees east and Hotbird 13 degrees east be in Dublin please? Also, I wrote in the Lidl sat system thread about how earlier something damaged one of the connections to my Comag dual LNB. Could it have been the box shorting it or I messing with the installation settings I wonder? I checked with different sat cable and it still doesn't work from that feed.

Enable Java/Javascript. Click on Ireland till the lat/long matches your location

http://www.lyngsat.com/tracker/badr5.html
http://www.lyngsat.com/tracker/hb6.html

iba

Hi,

Im in Dublin, I have a Triax 1.1m and a Triax Multi-Block.

I wish to get Hotbird 13 and Badr 26

To do this, what should I aim the centre bar of the dish too, is it Eurobird at 16 or Astra at 19?

Thanks

Iba

Zardoz

iba wrote: »

Hi,

Im in Dublin, I have a Triax 1.1m and a Triax Multi-Block.

I wish to get Hotbird 13 and Badr 26

To do this, what should I aim the centre bar of the dish too, is it Eurobird at 16 or Astra at 19?

Thanks

Iba

You will have to focus the dish on 26e as its a very weak satellite ,any offset and it wont be receivable.
13e is strong so a 13 degree offset will be fine.

snaps

As i recently took my 1.1m motorised dish down as im getting ready to move, I made up a multi feed arm for my ground mounted gerbertini 80cm for 13, 19, 23, 28. Today was the big test has we had a massive downpour, signal levels dropped but i seemed to hold on to signal on all sats.

Also to note im using 4* sky quad mk4 lnbs that i had lying around. These are feeding bedroom, kitchen and Living room boxes.

I think one of my diseqec switches has started to fail as port 1 wont switch on (Ive tried diferent receivers and still port 1 wont activate on any)

excollier

I installed these yesterday, took the multifeed from the TD88 and put onto the TD110.
The multifeed is set for 28.2e, 19.2e and 13e.
The TD88 is now set for thor 1w fr Thor 6 TV2 PL HD.
All working.
The owner had gotten rid of a motor in favour of the switched multifeed....fast and silent!

iba

Zardoz wrote: »

You will have to focus the dish on 26e as its a very weak satellite ,any offset and it wont be receivable.
13e is strong so a 13 degree offset will be fine.

Zardoz,

Thanks for your reply; however Im still a bit confused. You say I should aim the dish at 26e but unfortunatly on the Triax Quad rail it is not possible to put a LNB in the center. Would appreciate it if you could advise how I should proceed.

Regards

Iba

iba

Hi,

Please can someone reply/help/assist:

I would like to get Badr 26 and Hotbird 13 using a Triax Quad Rail on a Triax 1.1m Dish - and the question is: what sat should the main arm of my dish be pointing to please?

I know Zardoz recommeneded aiming for 26E but this is not possible with the Triax Quad rail as far as I can tell

Thanks

Iba

Zardoz

iba wrote: »

Hi,

Please can someone reply/help/assist:

I would like to get Badr 26 and Hotbird 13 using a Triax Quad Rail on a Triax 1.1m Dish - and the question is: what sat should the main arm of my dish be pointing to please?

I know Zardoz recommeneded aiming for 26E but this is not possible with the Triax Quad rail as far as I can tell

Thanks

Iba

I guess you should get the lnb for 26e as close to the centre of the bar as you possibly can and align the dish to maximise the signal at that point.
Main arm would be aligned to 23e with 26e on the left hand side of centre .
Then add 13e on the right which should work fine .`
Thats a serious design flaw on the Triax multilnb bar ,that one cannot have a centrally aligned lnb bar modification.

iba

Zardoz wrote: »

I guess you should get the lnb for 26e as close to the centre of the bar as you possibly can and align the dish to maximise the signal at that point.
Main arm would be aligned to 23e with 26e on the left hand side of centre .
Then add 13e on the right which should work fine .`
Thats a serious design flaw on the Triax multilnb bar ,that one cannot have a centrally aligned lnb bar modification.

Thanks Zardoz,

Ill give that a go and let u know how I get on.

Thanks again

Regards

Iba

givecredit

iba wrote: »

Thanks Zardoz,

Ill give that a go and let u know how I get on.

Thanks again

Regards

Iba

With some modification you can centre 26deg on triax multiholder. I suggest you have a read of this thread.

http://www.boards.ie/vbulletin/showpost.php?p=71172302&postcount=27

tryfix

I have been looking at those multi-feed LNB brackets in the images on this thread, they seem to give very limited movement. Just left and right of the central LNB without vertical movement, maybe i am missing something on the images. Anyway i would recommend making your own brackets and giving it a try, to see what you can get . An old LNB holder and bar from a dish that's not being used should be a good starting point . Cut the bar to about 150 mm or so and flatten the end with a hammer, drill a hole to take a 6mm bolt and improvise from there to a clamp on the bar coming out of the dish . It will give you the vertical movement to fine tune your signal as the different satellites all require the dish to be tilted at different angles on the vertical as well as the horizontal.

Here is my own homemade bracket it picks up hotbird and astra one on a central position of Astra 2 . Attachment not found.

iba

givecredit wrote: »

With some modification you can centre 26deg on triax multiholder. I suggest you have a read of this thread.

http://www.boards.ie/vbulletin/showpost.php?p=71172302&postcount=27

Givecredit - thank you

Ill give Zardoz's idea a go first - no modifications needed on the rail. If that does not work, Ill give ur idea ago.

Hope this rain stops soon so one can even get out into the garden

Once again, thanks for ur help guys.

Regards

Iba

iba

Hi again guys.

As promised please see photos of what I managed to do - took a while

Have Astra 28, Badr 26, Astra 19 and Hotbird 13.

Would like to change the Astra 19.2 LNB in order to pick up the Sat at 16 Degrees, but having no success at getting a signal - can anyone/someone let me know if its possible to get 16 degrees.

BTW the main arm of the dish is aimed at Badr

Thanks for all your help so far

Regards

IbaAttachment not found.

Attachment not found.

Zardoz

Nice job iba,very tidy.

I'm afraid there is no chance of getting 16e with a 10 degree offset on a Triax 110.
26e and 16e are two of the weakest satellites in the sky ,its either one or the other on a multilnb dish.

iba wrote: »

Hi again guys.

As promised please see photos of what I managed to do - took a while

Have Astra 28, Badr 26, Astra 19 and Hotbird 13.

Would like to change the Astra 19.2 LNB in order to pick up the Sat at 16 Degrees, but having no success at getting a signal - can anyone/someone let me know if its possible to get 16 degrees.

BTW the main arm of the dish is aimed at Badr

Thanks for all your help so far

Regards

IbaAttachment not found.

Attachment not found.

iba

Zardoz wrote: »

Nice job iba,very tidy.

I'm afraid there is no chance of getting 16e with a 10 degree offset on a Triax 110.
26e and 16e are two of the weakest satellites in the sky ,its either one or the other on a multilnb dish.

Thanks Zardoz,

I wouldnt say that tidy; have to fix up the wires a bit better - was waiting to know about 16 before tidying up and shortening the cables connecting to the switch.

Pity about 16 though as they show FTA Premiership Football matches from time to time.

One thing I noticed though and that is I have 2 stb - one humax HD box with Hard Drive which cost over £200 Sterling and a cheapo Lidl box - and sometimes I can pick up signals on the Lidl box better than the Humax which surprised me. For example Polonia 1 on Hotbird 13; clean as day on the Lidl but pixelated on the Humax

So is there any other sat that I can add to my four already before I do the final tidy?

Regards

Iba

rlogue

23.5 East should be ok but there's not a lot on there unless you have a Dutch CanalSatellite sub.

iba

rlogue wrote: »

23.5 East should be ok but there's not a lot on there unless you have a Dutch CanalSatellite sub.

Thanks Rlogue but whats a Dutch CanalSatellite sub please?

banie01

iba wrote: »

Thanks Rlogue but whats a Dutch CanalSatellite sub please?

sub = subscription, the card/cam for accessing a providers service
Dutch CanalSatellite = The main provider on 23.5

iba

banie01 wrote: »

sub = subscription, the card/cam for accessing a providers service
Dutch CanalSatellite = The main provider on 23.5

Thanks Banie

swoofer

@iba, what sat cables did you use and those f connectors look like they are gold plated, and what dish elevation is used. It looks very good.

Ronnie Raygun

The f-connectors can't be that good if he has to use that crappy tape on them & those big ugly lnbs must be about the worst thing for that kind of setup.

It's just all bog standard gear with no real ingenuity apart from the cable tie on the centre lnb. :rolleyes: