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
>>>>> _______________________________________________
>>>>>
>>>>>
>>>>>
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>>>>>
>>>>
>>>
>> _______________________________________________
>>
>>
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>
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