[NLRS] VB28FM EyeBolts??

[KBØNLY]

Ok, guess I need to explain further.  The eyebolt holds the antenna element 
in the boom, the inside diameter of the eye bolt needs to be 3/16" to 
properly hold the element in place.  Hence why I need that one particular 
size.  It's part of the antenna itself!

Go to Hy-Gain.com and then VHF/UHF beams, then click on the VB-28FM, and 
then open the .pdf manual.  Scroll down until you get to the element to boom 
assembly drawing and you will see what I am talking about.  I tried a 1/4 
and 3/8 eyebolt I had in the parts bins here, the just don't hold the 
element right, the 3/16 eyebolt creates a tight fit that larger size's 
can't.

So, McMaster doesn't have anything that will work unfortunately.

Scott




----- Original Message ----- 
From: "Dr. Gerald N. Johnson" <geraldj at ispwest.com>
To: <nlrs at mailman.qth.net>
Sent: Saturday, December 09, 2006 12:15 AM
Subject: Re: [NLRS] VB28FM EyeBolts??


>
>
> On Fri, 2006-12-08 at 23:24 -0600, KBØNLY wrote:
>>
>> Nope.. McMaster doesn't have the correct size.  One of the first places I
>> checked today.  Of all places to not have it.. Oh well, looks like I will
>> have to sit on my thumbs and wait for Hy-Gain.  I spent about five hours
>> google searching, phone calls, and emails.  Nobody has eyebolts that even
>> remotely match the specs I need.  I did find a few that have eyebolts 
>> that
>> have a 3/16" inside eye diameter, McMaster lists some as well, but they 
>> are
>> not machine thread eyebolts but the lag type for going into wood.
>>
>> I also found one place that has the right size eyebolts, 3/16" diameter 
>> eye,
>> but they are plain old soft steel and will likely rust faster than
>> imaginable.
>>
>> Scott
>>
> So what is it that is wrong from this eyebolt?
> http://www.mcmaster.com/addlcontent/cad.asp?PN=9494T31&view=2D&size=2
> Its a little longer, its welded so its stronger, its 3/16" - 24. Thats
> 10-24 within .001" or so. The eye is 3/8" instead of 3/16". So how does
> that mess up a brace wire or length of poly rope? Its not part of the RF
> circuit. By being welded its a whole lot stronger than anything you'll
> get from HyGain.
>
> Or look at: http://www.mcmaster.com/param/asp/psearch.asp?
> FAM=eyebolts&FT_147=60652&FT_255=53817&FT_1419=65249&FT_601=86827&FT_602=86783&FT_1968=86914&FT_1962=86875&ppe=6&session=eyebolts;147=60652;255=53817;M;I
> it has a slightly short shank and a 5/16" eye, but it isn't welded so
> its not as strong as the 9494T31 above.
>
> Failing those, I'd use a stainless steel bolt to hold down a chunk of
> 1/8" aluminum with two 3/16" holes and a 30 degree bend between the
> holes.
> -- 
> 73, Jerry, K0CQ,
> All content copyright Dr. Gerald N. Johnson, electrical engineer
>
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