[SixClub] Recommended Coax?

[Roger (K8RI)]

On 6/16/2010 4:27 PM, KB0NLY wrote:
> I second that conclusion....
>
> Condensation might cause a drip or to, but I haven't seen a condensation
> problem on this coax either.  Unless you putting on the connectors and
> sealing it up on a day with 100% humidity you shouldn't trap that much
> moisture in the coax to have it condense later on.
>    
If both ends are sealed, the pressure inside the coax can change 
dramatically with temperature causing the coax to breathe in and out 
through the connectors on either end. If the top is well sealed, or 
sealed better than the bottom then the cable will be breathing in what 
ever atmosphere is at that end. If there is moisture in there it will go 
along with the air.

Basically you can not prevent the coax, any coax, from breathing unless 
it is solid such as direct bury cables, or pressurized air core.
The last coax I had contaminated was LMR-400 and that was due to water 
getting into the power dividers.  Even though we consider N-type 
connectors water proof, the water went *through* both the female 
connector on the divider and the male connector on the coax.  The 
connectors were thoroughly sealed on the outside.

73

Roger (K8RI)73,
> Scott
>
>
>
> --------------------------------------------------
> From: "Mike Pappas"<advanceddigital at mac.com>
> Sent: Wednesday, June 16, 2010 2:51 PM
> To: "World Wide Six Meter Club"<sixclub at mailman.qth.net>
> Subject: Re: [SixClub] Recommended Coax?
>
>    
>> I would respectfully suggest that if "water poured out" you had a bigger
>> problem than condensation..
>>
>> Perhaps something wasn't sealed correctly...
>>
>>
>> Mike Pappas
>> W9CN
>> advanceddigital at mac.com
>>
>>
>>
>> On Jun 16, 2010, at 12:44 PM, Dave Rothermel wrote:
>>
>>      
>>> 9913 can get condensation in the spiral. Our radio club had an antenna
>>> problem. Saw a drip of water at the bottom tower connector. Cut the
>>> connector off and water poured out.
>>>                                     K9DVL
>>>        
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