Need prime focus LNB replacement (Costa Blanca)

[Pride Of Cucamonga]

You might want to try with something like this, doesn't cost much anyway...
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thanks, would these be the correct f/D ratio as Miika explained?

Exactly. Or you can buy new one, which matches with your dish. Need to know dish f/D ratio.
Offset LNBs works, if signals are strong, but are not suitable for weak transponders and fine tuning. Offset LNB can "see" only middle part of prime focus dish, therefore collecting about or less than 50% available signals.

Feedhorn must be metal, other materials do not collect signals. If there is plastic addings, these are just for weather protections.

thanks, learning a lot. according to woborny, an offset should be good enough for the area, but I'm getting very poor results

 

[woborny]

thanks, learning a lot. according to woborny, an offset should be good enough for the area, but I'm getting very poor results

Depends on the make / model / quality of the offset LNB you are using compared to the ones I use.
And assumes that your dish is aligned correctly.

 

[lovelyperson]

..................................................................thanks, learning a lot. according to woborny, an offset should be good enough for the area, but I'm getting very poor results

Hola,

Been using an offset LNB on my PF since reading reviews and later buying as per the 'Any lnb test reviews-lately.' thread as this link:-

Any lnb test reviews lately?

perhaps a complete read may assist.

Still using this MEGASAT Twin LNB Diavolo LNB two months later..........continuing superb reception here in Alicante with 1.8M Marrafa PF.......will change back to the Inverto C120 Quad Flange only as it is quad feed.

Sounds more likely as indicated that reason is probably dish alignment.

Whatever, good luck with things.

 

[Channel Hopper]

Here is mine. I lined it foil paper so the comtech inscription is covered.

Trying not to derail the thread but take a picture of the rear, in particular the Az/El mounting points


Are you certain it is 5m and not 4.8m ?

 

[Pride Of Cucamonga]

So this is the end of the feedhorn. Will that fit the C120? Also does anyone know the specification for the screws as the existing ones are broken / mangled (or are they supplied with the flange?). Thanks

 

[Satfaca]

Flange measures here.
You get the screws with the LNB if you buy new one...

 

[Pride Of Cucamonga]

Flange measures here.
You get the screws with the LNB if you buy new one...

cheers. doesn't show exact distance between holes but looks like it would fit based on overall diameter

 

[Channel Hopper]

This may help with the reflector identification and feed arm bolt-ons.

The ‘ole Comtech Dish Just Ain’t What She Used To Be

[August 2011] There are not very many stations today without at least one satellite dish for programming. Perhaps yours went in years ago and has worked well. Alan Alsobrook wants to alert you to a

www.thebdr.net

 

[ymttt]

Trying not to derail the thread but take a picture of the rear, in particular the Az/El mounting points


Are you certain it is 5m and not 4.8m ?

I have measured and confirmed it to be a 5 meter. Here are the pictures requested. The mounting os not to be the original one from the manufacturer and seem to have issues. I have also found the mounting pole not to be straight, but I don't know if that could account for low signals.

 

[Channel Hopper]

I have measured and confirmed it to be a 5 meter. Here are the pictures requested. The mounting os not to be the original one from the manufacturer and seem to have issues. I have also found the mounting pole not to be straight, but I don't know if that could account for low signals.

You have all adjustments on the bracketry to correct any alignment issue.

 

[ymttt]

You have all adjustments on the bracketry to correct any alignment issue.

Including the bent pole? I was thinking of remounting the pole.