Advice Needed Is a 4 degree separation on a 60cm dish possible?

[daro2096]

For example between Hotbird 13 east and Eutelsat 9 east?

 

[Trust]

There is a canaldigitaal duobloc for 19.2 and 23.5 So 4.3 offset

 

[Mickha]

There are 4 degree monoblock LNB's, but you might also get away with 2 separate, bullet nose, LNB's.

 

[davemurgtroyd]

There are 4 degree monoblock LNB's, but you might also get away with 2 separate, bullet nose, LNB's.

Most monoblocks aree designed for 80cm dishes so may give problems with signal levels on a 60cm.

 

[PaulR]

Most monoblocks aree designed for 80cm dishes so may give problems with signal levels on a 60cm.

Correct but in practice the greater aperture angle of a 60cm dish compared to an 80cm dish means that there will be little loss.

 

[rolfw]

I seem to remember that using a 3 degree monobloc on a 60cm gives 4.5 degrees.

 

[daro2096]

What about using Inverto Multiconnect lnbs?

Looking at a standard 60cm dish.

 

[timo_w2s]

I used two Inverto Multiconnect LNBs for 19.2E and 23.5E on a 60cm and it is doable but they aren't the best LNBs, especially when wet. 9E might struggle a bit at times on some transponders. I built a rain cover from a coke bottle to help keep the LNB heads dry which helped quite a bit.

 

[Ghostleader]

They multi connect LNBs are tragic with rain, boak!!

Sent from my Lenovo TAB 2 A7-30F using Tapatalk

 

[Tururu]

I seem to remember that using a 3 degree monobloc on a 60cm gives 4.5 degrees.

Monoblock 4'3º in 80cm, are approximately 6º in 60cm.
Monoblock 4'3º en 80cm, son aproximadamente 6º en 60cm.
It is laying on monoblock 60cm antennas Astra19ºE and Hot Bird13ºE.
Es el monoblock que ponen en antenas de 60cm para Astra a 19ºE y Hot Bird a 13ºE.

The yield is lower, losing the two satellite channels/El rendimiento es inferior, perdiendo canales en los 2 satelites.

True, the comrades who have Inverto Multiconnect, critics complain about what they are and problems with rain.
Cierto, los compañeros que tienen Inverto Multiconnect, se quejan de lo criticos que son y problemas con la lluvia.

 

[Archive4]

When I was doing research for Dutch clients I found a couple of 4.3 monoblocks designed for 60 cm dishes, here is a link to one of them

LNB : Canal Digitaal Duo LNB Twin

It must be a true 60 cm dish, ie 60 cm wide, for example the Triax, if only 60 cm high it is not a true 60 cm dish ( offset )
Also, you have to adapt the holder support depending on the lnb holder on the dish.

This should be ok ish for your needs, but cannot be sure. I will check the van later to see if I have on old one and run some checks if I do.

 

[daro2096]

Monoblocks are no good for me. Going to be running 3 or 4 lnbs.

 

[Archive4]

Monoblocks are no good for me. Going to be running 3 or 4 lnbs.

Ah! Different game then. Thanks for the quick reply, will save me hunting and running the tests!

 

[Tururu]

Looking carefully, yes.
You Monoblock 4th 60cm antenna.
I did not know, thanks.
The smallest I put friends is 80cm and 100cm many.
-----------------------------
Mirando detenidamente, si.
Tienes Monoblock de 4º para antenas de 60cm.
No lo conocia, gracias.
La mas pequeña que pongo a los amigos es de 80cm y muchas de 100cm.

Quad Monoblock 23mm LNB ,4.3° for 60cm dish, IDLB-QUDM22-DUO43-6PP
4 monoblock.- Inverto - IDLB-QUDM22-DUO43-6PP -

Twin Monoblock 23mm LNB ,4.3° for 60cm dish, IDLB-TWNM22-DUO43-6PP
2 monoblock.- Inverto - IDLB-TWNM22-DUO43-6PP -

4'3 for 60cm dish.

4'3º for 80cm dish.

6º for 80cm dish

 

[a33]

Monoblocks are no good for me. Going to be running 3 or 4 lnbs.

Why not? If needed, you can combine a monoblock with other LNB's.
If you can't solve your problem with separate LNB's, using a monoblock LNB would be a sufficient solution.

With separate LNB's: you should check the diameter of the LNB-feedhorn, and the width of the LNB-housing, if they are not to wide.
On top of that: Sometimes the LNB-holders are to wide; you have to consider that too.

So: it is definitively possible, yes.
Can you be more specific in what you want; to what problem you want a solution?

Greetz,
A33

 

[sonnetpete]

I'm running a 60cm dish, centered on 28E which has 23.5E on one side and 39E on the other. The LNB on 23.5E is a narrow feedhorn type and was really fiddly to set up and doesn't give very good results...It would probably be better to go up to an 80cm dish if you go for seperate LNB's and a multi bracket.

 

[Archive4]

Having digested the last few posts, I have decided to set up a recycled 60 cm triax with a duo lnb, just to see if it will work. I have a Konig, designed for 80 cm and I already know that will not do the job.

 

[a33]

The Canadigitaal duo-LNB for the Netherlands, designed for receiving 19east and 23east on the TRIAX64, has a distance between the feedhorn-pipes of 38 millimeter (centre pipe to centre pipe).

This distance covers a azimuth difference of about 5 degrees in the Netherlands on the 60 cm dish.

The head on an ALPS LNB is already 42-43 mm, I believe. Two of these could be problematic.
The megasat single LNB is also quite small and of good quality (also in rain), I read, but I don't know the width of that.

Greetz, A33

Edit: Megasat is 35mm, see
Megasat Multifeed Single LNB

 

[sonnetpete]

The megasat single LNB is also quite small and of good quality (also in rain), I read, but I don't know the width of that.

That's the LNB I'm using to receive 23.5E alongside a normal 40mm LNB for 28E. It's probably better than the pencil type Inverto ones in the rain but still not very good. The only way I could get it close enough to the 28E LNB was to attach them using a couple of 40mm heating pipe clamps (Munson clamp).

 

[a33]

That's the LNB I'm using to receive 23.5E alongside a normal 40mm LNB for 28E. It's probably better than the pencil type Inverto ones in the rain but still not very good. The only way I could get it close enough to the 28E LNB was to attach them using a couple of 40mm heating pipe clamps (Munson clamp).

The megasat came out as relatively the best out of this test of 23mm-neck LNB's by a member of the dutch forum sat4all.com:
Wat is de invloed van waterdruppels op SMALL FEED LNB's ? - Schotelpark - Sat4all

@sonnetpete:
With "normal 40mm LNB" do you mean a neck of 40mm, or a head of 40mm?
If the head is more than 40mm, e.g. a normal 60mm, then your megasat LNB alongside it could be too much out of its focus.

greetz,
A33