Marlon:
If you want to try something else to seal the connectors on your coax
runs, I can sugest 3M Scotch 2200 vinyl mastic pads. I used them right on
top of the homebrew ground straps and underneath the top Scotch 88 tape
wraps on my coax runs. Here's a link to some photos:
http://s83.photobucket.com/albums/j282/ersmar/?action=view¤t=Scotchmastic.jpg
.
73 de
Gene Smar AD3F
----- Original Message -----
From: "Marlon K. Schafer (509-982-2181)" <ooe@odessaoffice.com>
To: "K8RI on TT" <k8ri-on-towertalk@tm.net>; <towertalk@contesting.com>
Sent: Friday, September 30, 2011 2:27 PM
Subject: Re: [TowerTalk] heat shrink weathering
> mmm or 3m?
>
> I've used the glue filled version of that too. It just doesn't stick to
> the
> coax after a while and that leaves a way for water to get in.
>
> A new thing I've seen a couple of times lately has been a hole in my
> mastic
> tape. looks almost like some sort of bug has drilled a hole in it.
>
> I can't decide if I need to just tape over it or replace the entire cable
> and antenna (only 3' of cable). I am starting to wonder if it's more an
> issue of air having been in the connection when it was installed on a cold
> day and then pushing through as things got hotter.
>
> Any ideas?
> marlon
>
> ----- Original Message -----
> From: "K8RI on TT" <k8ri-on-towertalk@tm.net>
> To: <towertalk@contesting.com>
> Sent: Thursday, September 29, 2011 4:45 PM
> Subject: Re: [TowerTalk] heat shrink weathering
>
>
>> On 9/29/2011 6:37 PM, Marlon K. Schafer (509-982-2181) wrote:
>>> What is MMM stuff?
>>
>> It's a flooded heat shrink tube that comes various sizes made by MMM
>>
>> 73
>>
>> Roger (K8RI)
>>> marlon
>>>
>>> ----- Original Message -----
>>> From: "K8RI on TT"<k8ri-on-towertalk@tm.net>
>>> To:<towertalk@contesting.com>
>>> Sent: Monday, September 26, 2011 10:22 AM
>>> Subject: Re: [TowerTalk] heat shrink weathering
>>>
>>>
>>>> On 9/26/2011 11:52 AM, Marlon K. Schafer (509-982-2181) wrote:
>>>>> When I was in the service we used quite a bit of this:
>>>>> http://raychem.te.com/CableProtection.asp
>>>>>
>>>>> Pretty cool stuff. It had something in the jacket that showed when
>>>>> you
>>>>> were
>>>>> getting it hot enough etc.
>>>>>
>>>>> Lately I've used some from a local electrical supply house. It worked
>>>>> well,
>>>>> had lots of glue inside etc.
>>>>>
>>>>> What I found in my area is that when it gets cold the glue gets hard
>>>>> and
>>>>> doesn't stay sealed to the cable. This resulted in water penetration.
>>>> Try the flooded MMM stuff. It has never come loose here and we get a
>>>> number of days and nights below zero in the winter.
>>>>
>>>> 73
>>>>
>>>> Roger (K8RI)
>>>>> For the high frequencies that I work with this was a major problem.
>>>>> Any
>>>>> little bit of water at 2400mhz is a disaster. I've seen a LOT of sub
>>>>> 1ghz
>>>>> connections with no weather proofing at all work just fine.
>>>>>
>>>>> The heat shrink is great stuff where you can use it.
>>>>>
>>>>> laters,
>>>>> marlon
>>>>>
>>>>>
>>>>> ----- Original Message -----
>>>>> From: "Joseph or Ruth Patrick"<hdmc38@bellsouth.net>
>>>>> To: "Grant Saviers"<grants2@pacbell.net>
>>>>> Cc:<towertalk@contesting.com>
>>>>> Sent: Monday, September 12, 2011 6:40 AM
>>>>> Subject: Re: [TowerTalk] heat shrink weathering
>>>>>
>>>>>
>>>>> Good Morning Grant
>>>>>
>>>>> I can't give you an exact figure as to the life of the heat shrink
>>>>> tubing.
>>>>> If
>>>>> you can find out who the manufacturer is they should be able to help
>>>>> you
>>>>> out. I
>>>>> have used heat shrink on connectors that were hard to seal properly.
>>>>> To
>>>>> close to
>>>>> something, not enough clearance etc. I have had some in use for 5
>>>>> years
>>>>> now.
>>>>> Recently I had to replace an insulator on my mobile set up. I cut off
>>>>> the
>>>>> heat
>>>>> shrink and the PL-259 was bright and shiny as when I sealed it. I
>>>>> can't
>>>>> give
>>>>> you
>>>>> a name because the piece I have left is not marked. I did use the type
>>>>> with
>>>>> adhesive inside. Also look for a 3 to1 shrink ratio. If you don't have
>>>>> a
>>>>> heat
>>>>> gun I would suggest you purchase a cheap one unless you plan to use it
>>>>> a
>>>>> lot. I
>>>>> picked one up on E-bay for$20.00 + shipping. Yeah it was really cheap
>>>>> but
>>>>> it
>>>>> worked fine and still does. Just go slow and don't get it to hot. I
>>>>> also
>>>>> use
>>>>> a
>>>>> silicone based paste named "STUFF" inside the connection. Had good
>>>>> luck
>>>>> with
>>>>> that also. The adhesive type is hard to remove. Maybe some SteppIR
>>>>> owners
>>>>> can
>>>>> help with that. Good Luck let us know how you make out.
>>>>> 73 DE K4XZ Joe Patrick
>>>>> God Made Man
>>>>> Sam Colt Made Them Equal
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> ________________________________
>>>>> From: Grant Saviers<grants2@pacbell.net>
>>>>> To: towertalk@contesting.com
>>>>> Sent: Sun, September 11, 2011 7:59:10 PM
>>>>> Subject: [TowerTalk] heat shrink weathering
>>>>>
>>>>> I'm building a new SteppIR beam and they have changed from tape
>>>>> wrapping
>>>>> the fiberglass element joints to an adhesive lined heat shrink "CANUSA
>>>>> CFTV".
>>>>>
>>>>> This approach seems better than two layer's of Scotch 33 plus a layer
>>>>> self amalgamating silicone tape which is what is in the instruction
>>>>> book.
>>>>>
>>>>> My question is how long does the heat shrink/adhesive last in the
>>>>> weather, sun, etc? Apparently CFTV has been used for some time in the
>>>>> cellular business and a fellow towertalkian might have observed the
>>>>> performance for 5 to 10 years.
>>>>>
>>>>> I have plenty of silicone tape and plain old #33 so could wrap each
>>>>> heat
>>>>> shrink piece if that is warranted.
>>>>>
>>>>> 73,
>>>>>
>>>>> Grant KZ1W
>>>>> _______________________________________________
>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
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>>>>> http://lists.contesting.com/mailman/listinfo/towertalk
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>>>>
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