Wet LNB

[besit]

I found there's a big problem when you live in such a rainy place like Saint-Petersburg, Russia or London, UK. With a water on LNB you may loose a SAT signal completely.
To avoid it I made such a setup



It's a plastic bottle (5 liter for big dish, 0,5 liter - for small) cut with a scissors and attached over LNB
Now I don't affraid the rain

[Satbeam]

Re: Wet LNB

Well done on the recycling It looks very effective .

I held a straight edge on the third picture (Lumax dish) and it looks like the top of LNB is impeded from seeing top of dish . Nothing a trim off the plastic won't sort out .

Have you found any noticeable signal difference in rainy conditions yet ?

[besit]

Re: Wet LNB

This small dish (55cm) is pointed to 36E where ntv+ and tricolor tv (biggest Russian operators) are. This SAT is on Moscow longitude and it has a very strong signal even on a small dish. I had no problems with this dish, don't have them for now. I had rainy weather signal loss problems on a lagre dish (pic 1 and 2), which is focused to 13E and multifeeded to 9E and 4.8E. For now only very special rain (shallow but tight) may do some damage on the signal.

[gcms]

Re: Wet LNB

please use amiko or inverto black lnb it is fully water proof and do not affected by rain in rainy area thank u

[scooterman]

Re: Wet LNB

Looks like your problem might have been water getting in at the F connector since it is not protected from the rain ,perhaps some amalgamating tape round it or proper rubber water proof boot,rain does find its way down the threads into the f connector causing a short.
The main reason for using rain hoods is to stop the rain getting on to the face of the lnb causing attenuation or total loss of picture in heavy rain ,not really to water proof the lnb as such,but if it works for you then also you are stopping rain getting onto the lnb face.

I had a much larger rain hood but removed it as the strong winds were catching it ,but if the rain in this country gets any worse i can see me putting it back on.

[findeciclo]

Re: Wet LNB

Dear besit, the best way to protect your sat dish against raining is....



Best regards.

[microchick]

Re: Wet LNB

Usually the LNB's are made sealed and waterproof so the rain doesn't get inside it as long as the connections are made waterproof with a rubber cap on, Self amulgamating tape or silicon gel over it. If raing was the case, 95% LNB's in the UK will be out of order after installation.

[Mobley3]

Re: Wet LNB

Usually the LNB's are made sealed and waterproof so the rain doesn't get inside it as long as the connections are made waterproof with a rubber cap on, Self amulgamating tape or silicon gel over it. If raing was the case, 95% LNB's in the UK will be out of order after installation.

Have to agree with you microchick, We also get a lot of rain in Ireland and I have never found it a great problem unless it is torrential and then it is down to rain fade. I check regularly to make sure the amalgamating tape is good and I do not have any problems with water ingress, I also put some tape into the Lnb screw slot holes to stop any rusting on the threads, it helps when you are changing Lnb's.

Regards Mobley3

[pan1300]

Re: Wet LNB

hi

I never used tape or anything else ; installation for approx. 5 years now ; only on heavy rain sometimes get 'no signal' (= 2-3 times for half an hour a year) ; must say probably more rain in the uk than on the belgian coast.

So with good equipment and proper installation should it be fine ...

[findeciclo]

Re: Wet LNB

hi

I never used tape or anything else ; installation for approx. 5 years now ; only on heavy rain sometimes get 'no signal' (= 2-3 times for half an hour a year) ; must say probably more rain in the uk than on the belgian coast.

So with good equipment and proper installation should it be fine ...

So do I, I have never used tape or similar and never lose signal. But I think is better make the installations with the most elements as possible, like the amalgamated tape to seal in order to avoid cuts.
The best is to use very low noise rate LNBs because this is an important device, perhaps one of the most important devices of a sat installation.
Best regards.

[toby69]

Re: Wet LNB

Corroded satellite f connectors
These are typical of badly sealed outdoor satellite f connectors where water has got in & not only caused corrosion but also caused chemical reactions with the 13v/18v DC voltage shorting through the water.
These are the cheapest f connectors with no additional sealing ring - they were found loose but over sealed with self amalgamating tape that should have protected the joint but failed and allowed water into the joint- possibly because the tape was also the cheapest &/or the joints were loose.

[Mobley3]

Re: Wet LNB

Just goes to show that like most things regular maintenance is a must. Can be difficult when the dish is up on the roof and out of sight but well worth making the effort.

Regards Mobley3

[scooterman]

Re: Wet LNB

Yes i agree with the above comments but making the rain shield was a good idea if it keeps rain spots off the face of the lnb ,and its something that costs nothing to do,which will help keep him viewing during heavy rain on weaker sats.
You can also buy rain shields that go ever the lnb/lnb's but this one costs nothing .

[gcms]

Re: Wet LNB

the waterproof lnbs are made in such a way that they avoid the rainy water to get into so need of tape or any other rainshield to protect it from water because it make the signals quality weak but it is necessary to install the lnb in a right way that the rainy water may not get into it and also the signal not disturbed

[findeciclo]

Re: Wet LNB

the waterproof lnbs are made in such a way that they avoid the rainy water to get into so need of tape or any other rainshield to protect it from water because it make the signals quality weak but it is necessary to install the lnb in a right way that the rainy water may not get into it and also the signal not disturbed

OK, that's is truth, but all depends of the country/zone where is installed de sat dish. I mean, is not the same installing a dish in London than installing a dish in Sahara's desert. The rain rate is absolutelly different, so the quality of lnb's must not be the same.
Is recomended to install the lnb with some protection tape, or same sillicone protector adapter, as showed at the photo from my post in this thread.
A simple amalgamated tape cost not so much than 1 euro, and his protection is more important than this cost, because LNB is one of the most important component of a sat dish installation.
And a good pointment to the sat, a good good alignment of the azimuth, a low noise rate, and a good isolation with tape is basic to get an O.K. signal level.
Our friend, besit, has applied a good solution to avoid direct rain impact over their lnbs. Cheap and probably very effective.
Any contribution is wellcome and so on, thanks so much and best regards.