bad reception in rain

simon123456

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iv been getting bad reception in the rain with my 1.2 meter dish on some satllites if I cover the lmb up with a cover should that make a difrense regards simon
 
It's the rain between dish and satellite that is causing interference. Unless you can block the rain between dish and satellites (in space), nothing you can do.
 
iv been getting bad reception in the rain with my 1.2 meter dish on some satllites if I cover the lmb up with a cover should that make a difrense regards simon

with a 1.2 meter dish in the UK you should not get any bad reception.
 
certain transponders on 4.8east/4west/7.3west suffer from bad rain fade and unless you get a very large dish your stumped. you shouldnt have any problems with 90% of the Ku txp,s from 45east to 45west with a correctly set up 1.2m dish although PF dishes slightly under perform equivilent off-set dishes. regards mdt
 
Could I suggest summat, not that I know sh*t anyway but, if you have bad weather (that would likely reduce your signal) then covering the lnb is not likely to increase your signal?

Or is my understanding completely silly?
 
Could I suggest summat, not that I know sh*t anyway but, if you have bad weather (that would likely reduce your signal) then covering the lnb is not likely to increase your signal?

Or is my understanding completely silly?

the idea of covering the lnb is to stop water droplets staying on the lnb cap and can make a very slight difference of 0.3db/0.5db which can mean the difference of a stable signal but nothing beats a larger dish which equates to more carrier to noise and more rain margin above the tuner threshold. regards mdt
 

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It's the rain between dish and satellite that is causing interference. Unless you can block the rain between dish and satellites (in space), nothing you can do.

If Moses where around Problem solved :)
 
Which satellites/channels in particular are affected? What signal quality values do you normally get?
 
Maybe the lnb cover and the dish itself could be treated with a water repelling coating such as PTFE (Teflon) spray. This is the stuff used on things like non-stick frying pans and also finds use with bike sprays etc where all dirty water just slides off.

Apparently, a PTFE coating allows microwave radiation to pass through with very low loss. Just how low though, I don't know.

Optically, transmission is greater than 95%.
 
iv been getting bad reception in the rain with my 1.2 meter dish on some satllites if I cover the lmb up with a cover should that make a difrense regards simon
nope,it's the rain blocking the signal before it even gets to the dish.One of the joys of satellite reception,rain fade just when you need the signal the most.
 
surely most people who have these size of dish's know what happens when it pores down, when this post was made bertha was going through the uk and would of effected all the low powered fringe sats. If the signal goes during times like those just wait until the weather clears.
 
It is not only rain & clouds in the signal path from the uplink to the sat & from the sat to your dish but also it is rain droplets on the face of the dish and the face of the feedhorn, after it stops raining & clouds clear the droplets left on the dish face & feedhorn face continue to attenuate the signal until they have run off or evaporate off, if you have easy access to a dish you can prove it by wiping the water off & see the signal jump back up- (something worth knowing if you have a customer with a pub full).

Prime focus dishes don't suffer from water on the feedhorn face as much as it points down hence why some are open or have holes to allow draining but the prime focus dish face is more susceptible as it faces up more so rain doesn't run off as quickly & could even pool, on a near vertical offset dish rain runs off faster.

Colour does have an effect, a darker dish heats up more & evaporates water faster than a white dish.

The rough face of Channel Master dishes hold water on longer than smooth face dishes so a smooth, dark coloured Triax 1.1 can beat a Channel Master 1.2 just after rain until all water has evaporated off both.
 
I find plain furniture polish works well to prevent the rain water from 'sticking', but it does have to be re-applied regularly. Doubtless there will be 'better' products (at a price) but the old Pledge does well if access to the dish is easy. I wonder if that Rain-Ex stuff would work...
 
It's a well known trick here in Spain that if you put a plastic bag (supermarket type, not a bag for life!)
over your LNB the TV screen will tend to break up less in the rain and we are on the fringe of anything from 28.2E.
 
It's a well known trick here in Spain that if you put a plastic bag (supermarket type, not a bag for life!)
over your LNB the TV screen will tend to break up less in the rain and we are on the fringe of anything from 28.2E.


Rain in Spain???? lol
 
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