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Thread: 3rd LNB blown in under two years

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    Default 3rd LNB blown in under two years

    I just don’t get it. The dish is grounded with an 8ft ground rod. I have a lnb protector and yet again, I have a blown lnb. Can someone recommend a lnb that can survive lightning strikes in the area? I know it’s not hitting the dish. I have been using Titanium PLL’s.

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    Can you not add surge protection.

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    I did. Took that out too. I think it’s the Titanium brand. It doesn’t seem to handle any foreign voltage at all.

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    Did you use a ground block, or an inline gas dish-charge device???

    All a ground block does is ground the coax shield, a gas dish-charge device protects the center conductor, this would protect anything connected to the LNB, but nothing can directly protect the LNB.

    An even though you didn't get a direct hit the EMP from a light strike can wipe things out, the only lighting resistant LNB I've seen is one that has an all aluminum casing, but they are hard to find for consumer dishes, most are flange mount for the big commercial dishes.
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    I used an inline gas protector from amazon. I just ordered some cheap lnb’s out of China. I’m tired of throwing money at this. I’m going to order one out of Toronto too so it will be here in a week but I’ll just stock pile Chinese ones. At least when I come to the cabin, I can swap out one and still have tv. We have bad lightning from May until July here.

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    How close to you were the hits???? If you blew the in-line gas dish-charge device then it may have been a direct hit.

    If within a mile or so the EMP off a big one can wipe out most stuff.

    In the broadcast world we used a heavy duty A/B switch on the sensitive stuff, when we got word of thunder storms for our location we would switch over to a direct to ground connection, and post a "Sorry We are experiencing a temporary signal loss" card for the satellite channels affected by the ground out.....It worked most of the time.

    A good way to detect lightning is to use an old manual tuned AM radio set to no station, it will tell you that lightning is getting close, when you hear the hit on the radio then count by 1000-1, 1000- 2, ect, until you hear the thunder roll in, then divide that count by 5, this is how many miles it was away from you, if it's instantaneous then it's EMP will affect things.

    Do you have a lightning ground rod system protecting your house??? If so you may be getting stray spikes hitting your system, this could cause problems if the satellite system is in any way connected to this ground system, also if you have poor soil conductivity your ground it's self could be causing the problems.
    ♫♫♫ I’m a lumberjack and I’m OK ♫♫♫ I drink all night and sleep all day. ♫♫♫



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    I have intentionally never grounded any of my dishes or coax and have never had a problem and i live in florida. I believe grounding can cause a higher potential to ground and cause an easier path for potential surges to your equipment.................

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    I might remove the grounding. My dish network and bell both never had a problem and both of those are not grounded. The dish network dish is about 6 feet from the bud. I tried another receiver but it still didn’t work. So now I have a burnt dms one and two Titanium PLL’s. Watch the Chinese ones will work better. Hehehe.

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    Quote Originally Posted by steveOtoo View Post
    I have intentionally never grounded any of my dishes or coax and have never had a problem and i live in florida. I believe grounding can cause a higher potential to ground and cause an easier path for potential surges to your equipment.................

    Well it's very dangerous to not ground an RF system with an antenna outside up on a roof, (or other location) you have been very very lucky.

    I've seen what happens to someone who didn't have a grounded a system,(install mistake) they took a hit and it got them from across the room, you could see the smoke trail from the coax leading in from outside, the burnt CATV receiver, pieces of the TV still lying around and the burnt carpet where they where sitting.(carpet was burnt in many place's)

    I was called in as a consultant for the arson investigator, the place smelt like a burnt pork sandwich.

    I'd rather loose equipment then risk getting BBQ'ed.
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    The Dish LNB's have internal MOV's on the coax outputs.
    ♫♫♫ I’m a lumberjack and I’m OK ♫♫♫ I drink all night and sleep all day. ♫♫♫



    Coming soon to a crop circle near you.....

    There is a 66 and third % chance that I'm on the right planet...

    "I'm happier then a Jackalope in a balloon factory"

    "First rule of testing satellites"
    "If its working fine now, then don't mess with it"

    "Second rule of testing satellites"
    "If you did mess with it, and now it doesn't work, can you blame someone else?"

    "Third rule of testing satellites"
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    I’ll leave the grounding on and hopefully storm season is almost over.

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    You don't have a lightning rod system do you???
    ♫♫♫ I’m a lumberjack and I’m OK ♫♫♫ I drink all night and sleep all day. ♫♫♫



    Coming soon to a crop circle near you.....

    There is a 66 and third % chance that I'm on the right planet...

    "I'm happier then a Jackalope in a balloon factory"

    "First rule of testing satellites"
    "If its working fine now, then don't mess with it"

    "Second rule of testing satellites"
    "If you did mess with it, and now it doesn't work, can you blame someone else?"

    "Third rule of testing satellites"
    "If you did mess with it, and it doesn't work now, and you can't blame someone else"
    "Can you HIDE it"?

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    No. The dish is about 100 feet from the cabin. I think it’s lightning in the area.

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    Well since it's a "C" band setup with the LNB's up inside a cone, can you try this, wrap the LNB in one layer of 1/4 inch foam, (packing stuff), then one layer of aluminum foil, (except for the eye) then a layer of 1/4 inch foam, then one more layer of aluminum foil, do not let the two layers of aluminum touch each other, ground this layer.

    This will create somewhat of an EMP shield, I don't know how effective it will be but it has worked on 7 GHz stuff in the past.
    ♫♫♫ I’m a lumberjack and I’m OK ♫♫♫ I drink all night and sleep all day. ♫♫♫



    Coming soon to a crop circle near you.....

    There is a 66 and third % chance that I'm on the right planet...

    "I'm happier then a Jackalope in a balloon factory"

    "First rule of testing satellites"
    "If its working fine now, then don't mess with it"

    "Second rule of testing satellites"
    "If you did mess with it, and now it doesn't work, can you blame someone else?"

    "Third rule of testing satellites"
    "If you did mess with it, and it doesn't work now, and you can't blame someone else"
    "Can you HIDE it"?

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    I'm going to try that. I was looking in the box that I received my lnb in. What is the fibreglass plate used for? I've never installed it.

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