[TowerTalk] LMR600 male DIN

[TexasRF at aol.com]

Gary, your tape wrapping procedure obviously gave adequate protection. My  
perspective of the discussion has been more focused on not expecting  
various connectors to be self sealing against water intrusion because they are  
not. 
 
No doubt that your double wrap method would work well on any connector  
type. But, it has to be present to work!
 
73,
Gerald K5GW
 
 
In a message dated 9/7/2016 1:10:58 P.M. Central Daylight Time,  
rxdesign at ssvecnet.com writes:

Forgive  me - I've replied to Gerald's email but this is directed to the 
thread in  general: WHY all the concern for sealed connectors and connector 
types?  I've been using UHF for 49 years and the only time I've had issues 
with  those installed outside it was my fault - either poor wrap of tape or 
poor  solder job ... I've had cables with connectors that were out for 
years  
with electrical tape wrapped around them in 2 directions - years later  
when 
disassembling them for a move they were utterly pristine! I don't get  it - 
why so much  discussion?

Gary
K9RX



-----Original Message-----  
From: TexasRF at aol.com
Sent: Wednesday, September 7, 2016 8:56 AM
To:  john at kk9a.com ; towertalk at contesting.com
Subject: Re: [TowerTalk] LMR600  male DIN

John, you bring up a valid concern. I am not aware of any  coaxial type
connector that could be considered waterproof. The fundamental  reason is
because  the threaded connections do not create a hermetic  seal when they 
are
screwed  together.

There are inevitable  air spaces inside the connectors and coaxial  cables.
These air spaces  will fill with air. When the air is heated  (like outside
in full sun)  it will expand, creating a positive pressure.  Conversely, 
when
the  air cools (like at night), it will create a negative  pressure.  This
negative pressure will suck tiny amounts of water vapor through   the 
threads 
of
the connector.

If enough water vapor is present  droplets of water can condense during  the
cooling cycle and over the  course of days and weeks can collect inside the
connector. Once inside,  there is no escape and the droplets continue to
collect  over  time.

If there are rain or dew drops of water on the outside of the  cable, they
can also leak through the threads and collect inside the  connector. Gravity
is  not your friend here.

Many commercial  applications pressurize all of the cables even if they are
foam filled  types to prevent the problem. You may have noticed many of the
Heliax type  connectors have air fittings; that is why.

73,
Gerald  K5GW




Over


In a message dated 9/7/2016 5:37:52  A.M. Central Daylight Time,
john at kk9a.com writes:

Is any  TX  connector really water proof?  Are DIN's being   professionally
installed with no external butyl rubber and tape? On the  two  outdoor DINs
that I have, I weather proofed the connection the  same way I  did with UHF
and N connectors.

John  KK9A


To:      towertalk at contesting.com
Subject:    Re: [TowerTalk] LMR600  male  DIN
From:    "Roger (K8RI) on TT"   <K8RI-on-TowerTalk at tm.net>
Date:    Wed, 7 Sep 2016   01:08:48 -0400

Take care!
According to the Amphenol page N-Type  are  not water proof/weather proof.

73

Roger   (K8RI)

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