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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