Jim, you give me a simple role to follow:" Don't fix it until it's broken." I
give it to next year to see if I get any problem. I will add insulation to the
outside of the plate, Styrofoam with holes for the existing cables.
BTW The plate is about 6"x12" and can hold (predrilled with very small holes)
about 15 feedthroughs.
Hans - N2JFS
-----Original Message-----
From: James Chaggaris <jimc@pwrone.com>
To: towertalk <towertalk@contesting.com>
Sent: Fri, Nov 21, 2014 10:52 am
Subject: Re: [TowerTalk] Fwd: Fwd: Bulkhead feed-through.
At my old QTH, I used bulkhead connectors through a piece of 1/2² wood cut
to the size of my window well window. From there I used 2 sheets of
aluminum on either side of the wood and attached them together with SS
bolts. I grounded the whole thing using 2² copper strap to a couple of
ground rods outside. I used this feed-through for 6yrs and never had any
condensation. (I also sealed around the wood/aluminum panel with caulk).
73,
Jim N9WW
James Chaggaris
President
PowerOne Corp./PowerOne Environmental
2325 Dean St. Suite 200
St. Charles, IL 60175
Phn: 630.443.6500
Cell: 630.669.2241
Fax: 630.44366505
Website: www.pwrone.com <http://www.pwrone.com/>
On 11/21/14, 9:40 AM, "Hans Hammarquist via TowerTalk"
<towertalk@contesting.com> wrote:
>No Ron, it's worse. I have a square opening in the wall of my shack that
>is covered with a metal plate. There are holes in the plate that hold the
>bulkhead feed-troughs.
>
>
>My idea was to have easy access to the various feeders that goes up the
>tower. I plug in the coax from the trx whatever antenna I need for the
>moment. All the connectors are open to the air in the shack. I thought it
>was an excellent idea but realize now that it might not have been that
>excellent after all.
>
>
>As the plate has no insulation it will get cold in the winter and I will
>have condensation on it AND the connectors. If (I am sure it will) the
>condensation goes through the connectors I will also have water on the
>outside with following corrosion. :( As the connectors are sealed, the
>water will have no way to get out.
>
>
>Maybe I should remove the seals on the outside to reduce the risk of
>corrosion.
>
>
>Hans - N2JFS
>
>
>
>-----Original Message-----
>From: Ron W8RJL <youngron@verizon.net>
>To: Tower and HF antenna construction topics. <towertalk@contesting.com>
>Sent: Thu, Nov 20, 2014 11:41 pm
>Subject: Re: [TowerTalk] Fwd: Bulkhead feed-through.
>
>
>Hans apparently has a metal plate against the outside of his house/shack
>with feed thru connectors (they come in lengths to go thru the wall) and
>apparently thinks humidity can get thru the feed thru to the connector
>outside screwed onto the outside end of the feed thru. If I have
>understood
>his set up, I don't see where any moist air from inside the house/shack
>can
>get to the PL-259 outside because there will be a coax screwed onto the
>inside end of the feed thru.
>
>My comment is that most/many put the bulkhead plate a few inches away
>from
>the outside wall (enough room to be able to screw on a PL-259) and just
>run
>coax and a wide piece of braid thru the wall. Yes, the bulkhead it tied
>to
>or part of the ground rod so the bulkhead plate or box (rain protection
>for
>lightning arrestors etc) is in fact the SPG (single point ground).
>
>I don't think Hans has a problem especially if coax connectors are sealed
>with a good quality tape and/or lined heat shrink.
>
>Ron W8RJL
>----- Original Message -----
>From: <n8de@thepoint.net>
>To: "Hans Hammarquist" <hanslg@aol.com>; "Hans Hammarquist via TowerTalk"
><towertalk@contesting.com>
>Sent: Thursday, November 20, 2014 6:18 PM
>Subject: Re: [TowerTalk] Fwd: Bulkhead feed-through.
>
>
>>I don't understand Ron's post at all.
>>
>> My bulkhead is my SPG and is mounted in a vent about 1 foot from the
>> ground rod outside the house.
>>
>> In reference to the original question:
>> IF the bulkhead connectors are secure and there is a DRIP LOOP on the
>> INSIDE of them, there should be NO problem with water inside the
>> coax/bulkhead connector.
>>
>> 73
>> Don
>> N8DE
>>
>>
>>
>> Quoting Hans Hammarquist via TowerTalk <towertalk@contesting.com>:
>>
>>> Well, mine isn't. :(
>>>
>>>
>>>
>>>
>>> -----Original Message-----
>>> From: Ron Young <youngron@verizon.net>
>>> To: Hans Hammarquist <hanslg@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@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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>>>
>>>
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>>>
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>>
>>
>>
>> _______________________________________________
>>
>>
>>
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