[TowerTalk] heat shrink weathering

[TexasRF at aol.com]

Also known as 3M.
 
73/K5GW
 
 
 
In a message dated 9/29/2011 6:46:06 P.M. Central Daylight Time,  
k8ri-on-towertalk at tm.net writes:

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 at tm.net>
>  To:<towertalk at 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 at bellsouth.net>
>>> To: "Grant  Saviers"<grants2 at pacbell.net>
>>>  Cc:<towertalk at 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 at pacbell.net>
>>> To:  towertalk at 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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