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Thread: Uh-Oh

  1. #1
    Join Date
    May 2008
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    Thunderstorm, KY
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    1,739

    Default Uh-Oh

    Here's what happens...

    Click image for larger version. 

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    ... When 80 to 100+ mph wind meets 7 ft parabolic.

    That's a 2 in diameter steel mast the antenna is mounted on.

    I think the top of the tower may also be bent a little.

    Ugh.

    73, Ed NN2E
    Owner / Operator - Murphy's Law Test Site & Thunderstorm Proving Grounds
    "You Might Be a Redneck If...
    Your TV is on 24/7.
    Your TV has been permanently on for over a decade.
    The only time your TV is off is during a power outage.
    Your TV gets 512 channels, but you go outside to use the bathroom.
    Your new TV is sitting on top of your old TV.
    Your TV costs more than all of your other furniture.
    Your deer-stand has a TV antenna on it.
    Your cable provider has no idea that you exist."
    Jeff Foxworthy

  2. #2
    Join Date
    Aug 2016
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    Toledo
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    17

    Default

    Oh no... That is terrible news, and enough to make a man shed a tear.

    I hope you quickly resolve the problem, and are back DXing.

    Chad

  3. #3
    Join Date
    Jan 2015
    Location
    Akron Ohio
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    631

    Default

    2" diameter pipe?? Do you know if it was galvanized? I think I use 1-5/8" diameter galvanized fence post, but then again, I'm not flying a parabolic like that.
    Andrew

    My TV and FM DX Photos from Akron, Ohio...
    https://www.flickr.com/photos/133179000@N04/albums

  4. #4
    Join Date
    Aug 2007
    Location
    Franklin, TN
    Posts
    193

    Default

    Thant stinks, Ed. Hope you didn't have any other damage - it was quite a line of rough storms!

    Tommy

  5. #5
    Join Date
    Jul 2011
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    15 mi. N of Boston MA
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    Ooooh...that's awful. So sorry for you.
    2010 Honda Fit stock radio.
    Grundig G8 ultralight .

  6. #6
    Join Date
    May 2008
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    Thunderstorm, KY
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    Default

    If I can get it all to turn, I may spin it 180 degrees and wait for the next storm to bend it back. :-)

    Andrew... Having thought about it a little more, I believe the galvanized, water pipe, mast is actually 1.875" OD with a wall thickness of .125". Whatever it is, it's not enough.

    Ham Radio operators generally agree... "If the weather doesn't, occasionally, destroy your antenna system, it isn't big enough." :-)

    I have some repair work to do on the property... No major damage but it'll be a while before I get around to fixing TV antennas.

    73, Ed NN2E
    Owner / Operator - Murphy's Law Test Site & Thunderstorm Proving Grounds
    "You Might Be a Redneck If...
    Your TV is on 24/7.
    Your TV has been permanently on for over a decade.
    The only time your TV is off is during a power outage.
    Your TV gets 512 channels, but you go outside to use the bathroom.
    Your new TV is sitting on top of your old TV.
    Your TV costs more than all of your other furniture.
    Your deer-stand has a TV antenna on it.
    Your cable provider has no idea that you exist."
    Jeff Foxworthy

  7. #7
    Join Date
    Jan 2015
    Location
    Akron Ohio
    Posts
    631

    Default

    Hey Ed, I do structural engineering for a living. So I know a bit about this kind of stuff. I'm not sure exactly what the wind load would be for a parabolic dish with mesh on it. Maybe you can find that information in an old document from the manufacturer of these antennas. That would be helpful to know. I wouldn't be surprised if there was as much as 15 to 20 psf of wind load on that surface. If that's the case, then you could be seeing 500 to 800 lbs. of lateral wind load!! And the higher up the pole that dish is, the more bending moment is created. I wouldn't feel comfortable with a pole any less than a 1/4" thick (if you can find that), and you would still want a little more than 2" diameter (if it would fit in your rotor).
    Andrew

    My TV and FM DX Photos from Akron, Ohio...
    https://www.flickr.com/photos/133179000@N04/albums

  8. #8
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    May 2008
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    Thunderstorm, KY
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    The antenna system has gone 7 years and 8 months since it's last major overhaul (2009 ice storm). It survived 458 thunderstorm days (I keep track) and everything else Kentucky could throw at it, without any damage. The March 1st storm was one for the record books.

    (Who had 7 yrs, 8 mo in the - "How long will it last, this time?" - betting pool?)

    Andrew...The next mast might be a pipe, within a pipe, (within a pipe?)... You get the idea.

    73, Ed NN2E
    Owner / Operator - Murphy's Law Test Site & Thunderstorm Proving Grounds
    "You Might Be a Redneck If...
    Your TV is on 24/7.
    Your TV has been permanently on for over a decade.
    The only time your TV is off is during a power outage.
    Your TV gets 512 channels, but you go outside to use the bathroom.
    Your new TV is sitting on top of your old TV.
    Your TV costs more than all of your other furniture.
    Your deer-stand has a TV antenna on it.
    Your cable provider has no idea that you exist."
    Jeff Foxworthy

  9. #9
    Join Date
    May 2008
    Location
    Thunderstorm, KY
    Posts
    1,739

    Default

    Just hooked up the antennas to see if they'd still work...

    Click image for larger version. 

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Views:	55 
Size:	1.03 MB 
ID:	20060

    ... I was afraid this might happen.

    73, Ed NN2E
    Owner / Operator - Murphy's Law Test Site & Thunderstorm Proving Grounds
    "You Might Be a Redneck If...
    Your TV is on 24/7.
    Your TV has been permanently on for over a decade.
    The only time your TV is off is during a power outage.
    Your TV gets 512 channels, but you go outside to use the bathroom.
    Your new TV is sitting on top of your old TV.
    Your TV costs more than all of your other furniture.
    Your deer-stand has a TV antenna on it.
    Your cable provider has no idea that you exist."
    Jeff Foxworthy

  10. #10
    Join Date
    May 2014
    Location
    Arizona
    Posts
    2,236

    Default

    Quote Originally Posted by NN2E View Post
    Just hooked up the antennas to see if they'd still work...

    Click image for larger version. 

Name:	Pictures 033.jpg 
Views:	55 
Size:	1.03 MB 
ID:	20060

    ... I was afraid this might happen.

    73, Ed NN2E
    Owner / Operator - Murphy's Law Test Site & Thunderstorm Proving Grounds
    What exactly am I looking at?
    Este programa es público, ajeno a cualquier partido político. Queda prohibido el uso para fines distintos a los establecidos en el programa.

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