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Noise from SWM and Satellite Dish

SWM LNB Direct TV noise

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25 replies to this topic

#1 OFFLINE   RJCoke

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Posted 18 March 2014 - 10:41 AM

I have a Direct TV 5 LNB SWM and it seems to work fine with all my receivers. I have signal in the upper 90's and have experienced no problems other than this one.

Every Morning about sunrise my LNB make a terrible rattling sound. It's a metalic sound and sounds similar to a machine gun firing a short burst. It will usually do this 5 or so times with minute or two between each sequence. Anyone have any Ideas about what could be causing this? I even replaced the LNB with a new one a week ago and it still does the same thing>> 



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#2 OFFLINE   peds48

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Posted 18 March 2014 - 10:59 AM

are you sure is coming from the dish and/or LNB?


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#3 OFFLINE   P Smith

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Posted 18 March 2014 - 11:28 AM

redo tight all nuts/bolts again



#4 OFFLINE   peds48

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Posted 18 March 2014 - 11:32 AM

redo tight all nuts/bolts again

but that would be causing some other problems, don't you think?


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#5 OFFLINE   P Smith

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Posted 18 March 2014 - 11:33 AM

proper tightening is not cause for other problem ... perhaps you could tell about them ?



#6 OFFLINE   RJCoke

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Posted 18 March 2014 - 11:43 AM

I am sure it's coming from the the LNB/Dish. I have disconnected the receivers and it still happens in the mornings. All nuts, bolts, etc are tight. Dish is properly grounded. I am at a total loss as to what is causing the problem.

 



#7 OFFLINE   P Smith

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Posted 18 March 2014 - 12:13 PM

birds ? animals ?

I would put a camera and will record then review a footage ...



#8 OFFLINE   WestDC

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Posted 18 March 2014 - 12:18 PM

If every thing is working - Move the dish so you can't hear it :)


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#9 OFFLINE   waterdragon

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Posted 18 March 2014 - 12:27 PM

I had a customer's neighbor come over and tell me the dish was making a noise in her house. I asked her if it is happening now and she said no. Tem minutes later her ac kicked on and went over and asked and she said yes it was noisy now. I told her it was her ac, she still insisted it was the dish and demanded I move it.

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#10 OFFLINE   peds48

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Posted 18 March 2014 - 12:41 PM

proper tightening is not cause for other problem ... perhaps you could tell about them ?

What I meant was that bolts being loose would  cause other issues... 


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#11 OFFLINE   veryoldschool

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Posted 18 March 2014 - 01:11 PM

I had a customer's neighbor come over and tell me the dish was making a noise in her house. I asked her if it is happening now and she said no. Tem minutes later her ac kicked on and went over and asked and she said yes it was noisy now. I told her it was her ac, she still insisted it was the dish and demanded I move it.

Something like this seems more likely, as I can't think of what noise "could come" from the dish, LNB, or SWiM.

It shouldn't even "buzz" as it's fed with DC.


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#12 OFFLINE   carl6

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Posted 18 March 2014 - 01:21 PM

Flight of bugs/insects hitting it? Dust/sand blowing? Kids throwing stuff at it?

 

I would set my alarm for a bit early, 10 to 15 min before sunrise and get up and go outside and watch tomorrow morning and see.



#13 OFFLINE   lugnutathome

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Posted 18 March 2014 - 01:32 PM

Woodpecker!

I have one that likes the power pole and many mornings I can catch a short burst from my power pole which has one of those big can transformers on it. As I take the Army of Barkness out for morning manuevers i though it strange. But no winds, ground wasn't moving about, no traffic anywhere near the farm.

Finally spotted the little peckerhead which I should have known as he had tried some peckerin under my eaves recently but the Hardy Plank seems to give him a headache.

Is there wood around the dish mount? Could the sound be coming from an eve or under one in proximity?

Their attack is exactly as you describe your sounds to be. It may even be after your dish.

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#14 OFFLINE   veryoldschool

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Posted 18 March 2014 - 01:41 PM

Woodpecker!

I have one that likes the power pole and many mornings I can catch a short burst from my power pole which has one of those big can transformers on it. As I take the Army of Barkness out for morning manuevers i though it strange. But no winds, ground wasn't moving about, no traffic anywhere near the farm.

Finally spotted the little peckerhead which I should have known as he had tried some peckerin under my eaves recently but the Hardy Plank seems to give him a headache.

Is there wood around the dish mount? Could the sound be coming from an eve or under one in proximity?

Their attack is exactly as you describe your sounds to be. It may even be after your dish.

Don "this would give a smile to Walter Lantz" Bolton

Yeah, had one doing that too.

This reminded me of a case of "bird fade".

We had a poster complain of a loss of signal at random times.

Finally he was able to see a falcon/hawk use the LNB arm for a perch.


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#15 OFFLINE   slice1900

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Posted 18 March 2014 - 01:57 PM

I had a woodpecker pecking on a wooden support beam for my deck a couple years ago. It was always in the early morning, and sounded like short bursts of machine gun fire. It wasn't a metallic sound in this case, but maybe the TS has a particularly stupid bird pecking on the dish or metal roofing/siding in the vicinity of the dish.

 

FWIW, I got my woodpecker to quit by spraying some WD40 on the area where he was pecking. He came by only a couple times after that. I guess he got a bad taste in his mouth :)


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#16 OFFLINE   lugnutathome

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Posted 18 March 2014 - 07:02 PM

Bird fade :( I get quite a bit of that when the cherry orchard across the field starts getting ripe. They use predatory bird sounds to keep the bandits out and my high roof makes a great courage gathering stop. It is not uncommon to have over one hundred of the little beasts atop my roof. Then some sound startles them and we get immediate fluttering shade. Afternoon recordings will have a case of bird fade or two most days.

Don "the price for living in paradise" Bolton

Yeah, had one doing that too.
This reminded me of a case of "bird fade".
We had a poster complain of a loss of signal at random times.
Finally he was able to see a falcon/hawk use the LNB arm for a perch.



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#17 OFFLINE   dennisj00

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Posted 18 March 2014 - 07:10 PM

They like gutters around here.  Must be sharpening their beaks?



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#18 OFFLINE   RJCoke

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Posted 18 March 2014 - 10:43 PM

Yes I am sure it's coming from the Dish/LNB. I have stood under it and listened to it. I can see no vibration in the dish so I am sure it's in the LNB. I am wondering if it might be the polarity switch inside the LNB. It only seems to do it about sunrise and I am wondering if it temperature related. It did it a week ago in the afternoon right after a rain storm had cooled things down and the sun started shinning again. Sure Baffles the hell out of me. My dish is mounted solid enough for me to sit on without loosing signal strength. It's not birds since the noise drives them off anyway and I can't move it because of where I live. I have used DTV for over 20 years, made all kinds of repairs and setups but this one has me baffled. I suppose the next step will be to change the power supply and see what happens although I doubt that will be the problem.



#19 OFFLINE   carl6

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Posted 18 March 2014 - 10:51 PM

There are no mechanical/moving parts inside the LNB assembly, everything (switching, etc.,) is done electronically. There is absolutely nothing inside there that could make any noise. I've taken LNBs completely apart, I speak from first hand experience.



#20 OFFLINE   carl6

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Posted 18 March 2014 - 10:52 PM

So, the noise is coming from the area of the dish, and there is nothing you can see at the time.  Take something and sweep out the hollow mast arm - maybe something has nested inside of it.







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