[NCC] Through Wall suggestions

[tleek8az]

Tim,

About three years I did something similar to what K8MR did, but with some
helpful improvements.  In addition to PVC tubing through the wall, I found
some rubber boots that fit over the PVC and which had a 45 degree elbow.  I
added to that another short rubber reduction segment to the next lower size
of PVC.  (It took some looking to find the right thing -- but you're a pipe
fitter -- you will know where to look!).  I put the cables through
everything, used stainless steel wool (thank W3YQ) to jam up the PVC, then
put the boots on, with more steel wool and a good hose clamp on the outside
end to make sure that the boot was quite tight around the cables.  That
ended a 25-year history of mouse intrusion through the previous cable
entrance scheme, and it has held up for three years.  (Not very easy to
work with when you want to add a cable, but there are trade-offs to
everything.)

73,
Tom, K8AZ

On Thu, Apr 12, 2018 at 9:40 PM, Jim Breakall <jimb at psu.edu> wrote:

> Hi Tim,
>
> In the professional communications world into shelter buildings, etc. and
> what we did at the K3CR contest station,
> you can use rubber boot assemblies for the heliax cables made just for
> this purpose.  We tried the PVC pipe approach
> also with steel wool in it but the mice would eventually pull out the
> steel wool and still get in.  These rubber boots
> seem to be more full-proof and they don't seem to like to chew on the
> rubber.
>
> Good luck and the main thing is to keep mice and hornets out of the
> building.  We eventually put all of the heliax and lightning arrestors and
> antenna switches in a large container shelter outside and then just ran
> very few cables into the building.
>
>  https://www.launch3telecom.com/commscopeandrew/204679a7.html
>
> 73  Jim  WA3FET
>
>
> On 4/12/2018 8:55 PM, kq8m at kq8m.com wrote:
>
>> Thanks Jim,
>>
>>
>> 73
>>
>> Tim, KQ8M
>>
>> kq8m at kq8m.com
>>
>>
>> From: jimk8mr at aol.com [mailto:jimk8mr at aol.com]
>> Sent: Thursday, April 12, 2018 20:45
>> To: kq8m at kq8m.com; ncc at contesting.com
>> Subject: Re: [NCC] Through Wall suggestions
>>
>>
>> At our old house in Cleveland Heights (1976-1987) I cut a hole in the
>> wall to the second floor hamshack room, and inserted a piece of 2" PVC pipe
>> to run the coaxes through. Kept it stuffed with steel wool and other
>> sealant to keep the critters and cold out.
>>
>> When we moved, I put a PVC cap over both ends.
>>
>> I the current house there was an opening which had previously been used
>> to fill the oil tank, long since abandoned in favor of natural gas. PVC
>> pipe through that hole as well.
>>
>> I do include a 90 degree elbow outside, with bottom half removed to allow
>> better access to the pipe, to shield from rain.
>>
>>
>> 73  -  Jim  K8MR
>>
>>
>>
>> -----Original Message-----
>> From: kq8m <kq8m at kq8m.com>
>> To: North Coast Contesters <ncc at contesting.com>
>> Sent: Thu, Apr 12, 2018 7:00 pm
>> Subject: [NCC] Through Wall suggestions
>>
>> I am getting new siding and would like suggestions on how you guys run
>> your
>> coax through the outside wall. I would like to make this neat if possible.
>>
>>
>>
>> Thanks.
>>
>>
>>
>> 73
>>
>> Tim, KQ8M
>>
>> kq8m at kq8m.com
>>
>>
>>
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>>
>>
>>
>
> --
> James K. Breakall
> Professor, Electrical Engineering
>
> 225 Electrical Engineering East
> Penn State University
> University Park, PA 16802
>
> Tel: 814-865-2228
> Fax: 814-863-8457
> Cell: 814-883-6521
>
>
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