[TowerTalk] High VSWR

David Gilbert xdavid at cis-broadband.com
Wed Aug 28 21:32:36 EDT 2019


That certainly is tragic, although I'm greatly relieved that it doesn't 
appear anyone was hurt.

It is truly amazing to see the thought and effort you put into that 
antenna, and a tremendous shame to have it come down like that.  I hope 
you decide to rebuild instead of finding a different hobby.

This is one case where being able to post the pictures to the reflector 
would have been desirable.  I'm sure you don't want to be bothered by 
that, so if anyone wants to see them I will forward them for you.  For 
those interested, send me a private reply ... not to the list.

Take care,
Dave   AB7E



On 8/28/2019 6:12 PM, Doug Ronald wrote:
> I'm too upset to do a complete post mortem, but the antenna lowered to about the point in the attached image, and then there was a failure in either the 1/2" wire rope, or the wire rope slipped out of the 4 clips I had at the antenna end. My calculated tension in the cable was 14,900 pounds with the antenna at the horizontal position, but at 45 degrees, the tension would have been only 11,000 pounds or so.
> The clips were to be torqued to 65 ft. lb. but not overtightened such that the wire rope is crushed. I don't have a torque wrench, so I guessed at the 65 ft. lbs. I guess I didn't have them torqued enough, but there was no slippage when I put the antenna up a couple years ago using the same rope, and the same clips.
>
> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of David Gilbert
> Sent: Wednesday, August 28, 2019 16:51
> To: towertalk at contesting.com
> Subject: Re: [TowerTalk] High VSWR
>
>
> That story would be a lot more interesting if you actually explained what happened.
>
> Dave   AB7E
>
>
>
> On 8/28/2019 3:30 PM, Doug Ronald wrote:
>> Hmmm, my VSWR came up a little high this afternoon, see my QRZ page to
>> see why.
>>
>>    
>>
>> Actually, I shouldn't joke about it - I'm totally devastated.
>>
>>    
>>
>> 73 all,
>>
>> -Doug Ronald, W6DSR
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