[TowerTalk] Hose Clamps Compared

[Jim W7RY]

There have always been two of them on the antennas I've installed the 
last 40+ years.

73, Jim W7RY


On 8/9/2022 12:57 PM, Jeff Blaine wrote:
> I could not remember what a DB224 was.  Looked it up and was laughing 
> to see the hose clamp on that antenna.  The funny part is that in the 
> current version, they have doubled up on the hose clamps - meaning 
> there are 2 side by side.
>
> No doubt they added a 2nd hose clamp because the first one was 
> ultimately inadequate to the task.
>
> 73/jeff/ac0c
> alpha-charlie-zero-charlie
> www.ac0c.com
>
>
> On 8/8/22 9:28 PM, Jeff Blaine wrote:
>> Apples and oranges.
>>
>> Hose clamps work fine with HORIZONTAL elements.  The slightest 
>> compression is adequate to contain most movement.
>>
>> But the issue K3PA mentions is with a vertical 4SQ.  That is a 
>> completely different issue all together.  The tension must be high 
>> enough to resist the total vertical force of the metal above, while 
>> being twisted in the wind, over time and temp.
>>
>> And even here in Kansas, where the wind does blow on occasion, we can 
>> appreciate the differences between 21' and 65' - assuming the 21' 
>> mention is vertical in orientation.
>>
>> 73/jeff/ac0c
>> alpha-charlie-zero-charlie
>> www.ac0c.com
>>
>>
>> On 8/8/22 12:17 PM, john simmons wrote:
>>> And yet a popular and old design 21’ commercial antenna is 
>>> successfully held together with one worm drive hose clamp
>>>
>>>> On Aug 8, 2022, at 11:19, Drew Vonada-Smith 
>>>> <drew at whisperingwoods.org> wrote:
>>>>
>>>> Ouch.  I think I bought a tomato slicer from that guy once.
>>>>
>>>> I've had better luck with the T-bar style clamps in the tougher 
>>>> applications.  But on my 80M 4SQ, which needed repairs every year, 
>>>> I gave up and went to a combination of bolts, and rivets on the 
>>>> smaller sections.  Not a failure since.  I've mostly given up on 
>>>> hose clamps as a reliable antenna fastener.
>>>>
>>>> K3PA
>>>>
>>>> -----Original Message-----
>>>>
>>>> Message: 1
>>>> Date: Sun, 7 Aug 2022 20:53:15 -0400
>>>> From: Jon Pearl - W4ABC <jonpearl at tampabay.rr.com>
>>>> To: towertalk reflector <towertalk at contesting.com>
>>>> Cc: CrankupTiltoverTowers at groups.io
>>>> Subject: [TowerTalk] Hose Clamps Compared...
>>>> Message-ID: <f932d352-32fe-2a22-a0e9-3fe1e61a8e81 at tampabay.rr.com>
>>>> Content-Type: text/plain; charset=UTF-8; format=flowed
>>>>
>>>> Sixteen hose clamps are put through a torture test in the video, 
>>>> below.?
>>>> A link to each clamp is provided under the description.
>>>>
>>>> https://www.youtube.com/watch?v=jtMPq2lG-8U
>>>>
>>>> 73,
>>>>
>>>>
>>>> Jon Pearl - W4ABC
>>>>
>>>> *********************************
>>>> _______________________________________________
>>>>
>>>>
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-- 
Thanks and 73, Jim W7RY