[TowerTalk] Fwd: Bulkhead feed-through.

[Roger (K8RI) on TT]

On 11/20/2014 5:58 PM, Hans Hammarquist via TowerTalk wrote:

Mine are inside NEMA boxes, with a 3 to 4" tube into the building.  The 
tube is filled with expandable foam. Keeps critters and weather out.
http://www.rogerhalstead.com/ham_files/cablebox.htm Check the 4th photo 
down.  It's since been replaced with a larger box and the conduit filled 
with foam.

2nd photo down shows the foam filled ends of the conduit headed for the 
basement.

OTOH Weather proof the connectors if moisture is a problem.

Those big boxes on the tower have a LOT of connections. About 25, give 
or take a few. Moisture has never been a problem yet!  Cables from the 
boxes to antennas either go through glands, or weather proof feed 
throughs.  The two RG-59 cables to the satellite dish pass through the 
box as well.  They use type F bulkhead connectors.


73

Roger (K8RI)


> Well, mine isn't. :(
>
>
>
>
> -----Original Message-----
> From: Ron Young <youngron at verizon.net>
> To: Hans Hammarquist <hanslg at aol.com>
> Sent: Thu, Nov 20, 2014 5:42 pm
> Subject: Re: [TowerTalk] Bulkhead feed-through.
>
>
> Usually the bulkhead is on stand-offs so the plate is off the outside wall. Only
> coax goes thru the wall. There should be no vapor going thru the coax so no
> problem.
> Ron W8RJL
>
> Sent from my iPhone
>
>> On Nov 20, 2014, at 5:34 PM, Hans Hammarquist via TowerTalk
> <towertalk at contesting.com> wrote:
>> I have a grounded, metal plate that carries all my bulkhead connectors from
> the outside to the inside. No big deal except: I have wrapped the outside of the
> connectors with water tight tape.
>>
>> Consider that the temperature is lower outside than inside (Vermont) I am
> afraid that I will have water buildup on the connectors on the outside as vapor
> easily can get through from the inside.
>>
>> Comments! Have anyone have had a problem with this before? Do I have to get
> guarantied water tight bulk, feed-through connectors?
>>
>> 73 de,
>>
>>
>> Hans
>>
>>
>> N2JFS
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-- 

73

Roger (K8RI)