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Re: [TowerTalk] Fiberglass rod

To: n0tt1@juno.com
Subject: Re: [TowerTalk] Fiberglass rod
From: K9MA <k9ma@sdellington.us>
Date: Sun, 8 Mar 2020 13:42:11 -0500
List-post: <mailto:towertalk@contesting.com>
Don’t use nylon, either. It is very lossy at RF. Fiberglass is OK, but must be 
protected from UV.

73,
Scott K9MA 

----------

Scott Ellington

 --- via iPad

> On Mar 8, 2020, at 12:33 PM, n0tt1@juno.com wrote:
> 
> I wouldn't use Delrin for that....had Delrin on a 4el quad some years ago
> and it
> wasn't UV proof...also, seemed to become brittle over time.  Delrin
> insulators
> would break under stress.
> 
> Have you checked www.McMaster.com ?  They have a large assortment of
> rods....don't know about 1.5" though.
> 
> 73,
> Charlie, N0TT
> 
> On Sun, 8 Mar 2020 13:09:31 -0400 Dave Sublette <k4to.dave@gmail.com>
> writes:
>> Follow up Question.  My browser now works.  Go figure.  Question:  Is 
>> there
>> any other material (Delrin comes to mind) that you would recommend 
>> for this
>> application?  The rod will be 1.5 inches in diameter and insert at 
>> least 6
>> inches into each half of the dipole. This is a 40 meter dipole and 
>> is heavy
>> (75 pounds).  It is supported by strut ropes, but will be subject 
>> to
>> bending horizontally and to some us flexing as the wind generates 
>> lift.
>> Some torque will be present for the same reason.
>> Keep in mind, I have a similar material that has been in service
>> satisfactorily for over a year on my pair of two element Moxons 
>> (without
>> strut ropes).  So I'm sure this will work.  I am  just curious to 
>> have the
>> benefit of your experience.
>> 
>> Thanks,
>> 
>> Dave, K4TO
>> 
>>> On Sun, Mar 8, 2020 at 12:52 PM Dave Sublette <k4to.dave@gmail.com> 
>>> wrote:
>>> 
>>> Well....it appears that something is out of whack with my browser. 
>> I will
>>> try another flavor.  I have two more available.
>>> 
>>> Thanks everyone.
>>> 
>>> Dave, K4TO
>>> 
>>> On Sun, Mar 8, 2020, 12:42 PM Grant Saviers <grants2@pacbell.net> 
>> wrote:
>>> 
>>>> McMaster.com  FR4 to 4" diameter
>>>> 
>>>> Grant KZ1W
>>>> 
>>>> On 3/8/2020 09:29, Dave Sublette wrote:
>>>>> Some time ago (two years) I bought some 1.75 inch diameter 
>> fiberglass
>>>> Rod
>>>>> to use as a center insulator for my 40 meter Moxon project.  I 
>> bought
>>>> the
>>>>> material from Max-Gain Systems, somewhere in Georgia.  I now 
>> get an
>>>> error
>>>>> message indicating that the web page no longer exists.  Does 
>> anyone know
>>>>> where they went or where I can buy large diameter fiberglass 
>> rod?
>>>>> 
>>>>> Than ks,
>>>>> 
>>>>> Dave, K4TO
>>>>> _______________________________________________
>>>>> 
>>>>> 
>>>>> 
>>>>> _______________________________________________
>>>>> TowerTalk mailing list
>>>>> TowerTalk@contesting.com
>>>>> http://lists.contesting.com/mailman/listinfo/towertalk
>>>>> 
>>>> 
>>> 
>> _______________________________________________
>> 
>> 
>> 
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> 
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> 
> 
> 
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