Cardboard feed-horn for weak FTA satellite signals

[skytec]

I found the following figure of cardboard feed-horn, to improve signal quality.
What do you think?

[microchick]

Re: Cardboard feed-horn for weak FTA satellite signals

This looks like an interesting idea. I don't know about this setup but I have seen people covering the LNB with metallic net or a fine net cloth. They thought it improves the signal quality.

[rikksow]

Re: Cardboard feed-horn for weak FTA satellite signals

When i initially read this post i thought it was a joke, but then i ******d it and its surprising how many posts and how to's there are out there concerning home made cardboard feedhorns. Although how effective they are remains to be seen and how they will withstand the elements also. Let us know if you try it and if it makes any difference.

[odysseas1991]

Re: Cardboard feed-horn for weak FTA satellite signals

I found the following figure of cardboard feed-horn, to improve signal quality.
What do you think?

Is it a fact that a feedhorn can improve a signal quality, even by a little amount?

If so, how much more signal improvement does it provide. This sounds interesting to implement if it is useful as I have alot of fringe receptions that I could boost signal quality with.

[rikksow]

Re: Cardboard feed-horn for weak FTA satellite signals

I know when i was living in Cyprus we used to have to install 2.7m dishes to receive sly uk and in those cases we used to have adjustable aluminium feed horn and found that we got better performance with a slightly longer feedhorn

[rikksow]

Re: Cardboard feed-horn for weak FTA satellite signals

Also i think you will find by being able to adjust the distance of the LNB to the dish sometimes brings in a stronger signal

[microchick]

Re: Cardboard feed-horn for weak FTA satellite signals

Also i think you will find by being able to adjust the distance of the LNB to the dish sometimes brings in a stronger signal

This is the simple and the important step to increase the signal. You need to move the LNB forward and backward to get better signal. In C band the LNB size is far bigger than that of the ku band and you need a bigger feed horn. Thats why they introduce some special kind of feedhorn to earn some extra £££

[Satbeam]

Re: Cardboard feed-horn for weak FTA satellite signals

I can see it becoming home to spider webs and dead flies which will attenuate the signal . The fact that it's cardboard can't be ideal in wet conditions . The only possible benefit I see is to reduce reflections from outside the dish perimeter which shouldn't be an issue with a suitably aligned LNB anyway .

[Mobley3]

Re: Cardboard feed-horn for weak FTA satellite signals

I suppose anything that helps to focus the signals onto the Lnb will help performance,
surely a properly designed feedhorn is supposed to do this job already and I have to think that most of the gain could probably be put down to a badly adjusted setup in the first place. It is always worth spending an extra few minutes fine tuning the Lnb in the mount.

Regards Mobley3

[scooterman]

Re: Cardboard feed-horn for weak FTA satellite signals

What does help signal during wet weather is a perspex lnb rain hood ,i have one it looks like a crash helmet visor and it sits just above the lnb so no droplets get on lnb face,it helps maintain a good signal on weak sats during wet weather and i swear the signal increases a little when fitted ,a bit like the feed horn idea but the only draw back is high winds catch it and rattle the dish more than normal.
There is always attenuation to a signal thru heavy rain clouds but keeping the lnb dry means the weak sats dont get lost.

[qasimsfpl]

Re: Cardboard feed-horn for weak FTA satellite signals

I found the following figure of cardboard feed-horn, to improve signal quality.
What do you think?

yes it improve the signal up to 5%

[rizwan]

Re: Cardboard feed-horn for weak FTA satellite signals

It improve the signal more than 5 % for me, I think this feed horn stop unwanted signals other than converging the signal towards LNB.

[gianni253]

Re: Cardboard feed-horn for weak FTA satellite signals

No doubt waveguide feed horns can improve signal quality and their construction is not critical because they have no resonant elements.
Best if they are designed with a modelling antenna software, also taking into account the dish that is being used.

[kostis]

Re: Cardboard feed-horn for weak FTA satellite signals

yes it improve the signal up to 5%

it has to do better than that to put this ugly horn on my roof
saw something similar for the internet wifi antenna in ******* but never take it seriously. lets here some more people if this lnb horn really help signal strength.

[terryashbyash]

Re: Cardboard feed-horn for weak FTA satellite signals

For me the 3 most important ways to improve signal are
1. Bigger dish size
2. Better lnb (inverto black ultra good for fringe)
3. More sensitive receivers, my F3 is good.
Also not sure if cardboard would get wet and soggy in heavy rain and some lnbs do come with matched feed horn. But if you do pefect this keep us posted