[TowerTalk] Feedlines: inside or out on tower?

[Dick Dievendorff]

What I did was clamp a DXE thru bulkhead connector on a bracket to a tower leg near the top.  It's a long barrel connector.  Then I connected the rotator loop to that and a straight run from there down to the base where my antenna switch was clamped to the tower and grounded again.

http://www.dxengineering.com/search/department/grounding-and-lightning-protection/product-line/dx-engineering-coax-grounding-brackets?autoview=SKU


Dick, K6KR


On Aug 20, 2012, at 8:53 AM, iain macdonnell - N6ML <ar at dseven.org> wrote:

> On Mon, Aug 20, 2012 at 5:10 AM, K8RI <K8RI-on-TowerTalk at tm.net> wrote:
>> On 8/19/2012 11:59 AM, Jeff DePolo wrote:
>>> 
>>> If the cable shields are properly bonded to the tower at the top and bottom
>>> of the vertical run as they should be, if for no other reason than lightning
>>> protection, then it doesn't matter whether they are inside or outside the
>>> tower.
>> 
>> IF and I emphasize the "IF" you ground the coax shield to the tower at
>> the top and bottom of the tower then it should really make no difference
>> that I can see even if shunt feeding the tower. However you would need
>> to make sure the grounds at top and bottom were very low ohm.
> 
> This is probably a really stupid question, but it's Monday morning, so
> I have an excuse...
> 
> How do you "ground" the coax shield at the top of the tower? What do
> you connect it to??
> 
> 73,
> 
>    ~iain / N6ML
> 
> 
> 
>> OTOH if the tower gets climbed much being inside would offer more
>> protection.
>> 
>> 73
>> 
>> Roger (K8RI)
>> 
>> 
>>> 
>>>                              --- Jeff WN3A
>>> 
>>>> -----Original Message-----
>>>> From: towertalk-bounces at contesting.com
>>>> [mailto:towertalk-bounces at contesting.com] On Behalf Of Larry
>>>> Sent: Sunday, August 19, 2012 11:39 AM
>>>> To: towertalk at contesting.com
>>>> Subject: Re: [TowerTalk] Feedlines: inside or out on tower?
>>>> 
>>>> I believe it is ON4UN's book where there was discussion of inside vs
>>>> outside. If you wanted to shunt feed the tower then inside
>>>> was preferable as
>>>> I recall. Apparently minimizes RF on the feedlines.
>>>> 
>>>> 73, Larry  W6NWS
>>>> 
>>>> -----Original Message-----
>>>> From: Jim Hoge
>>>> Sent: Sunday, August 19, 2012 11:10 AM
>>>> To: towertalk
>>>> Subject: [TowerTalk] Feedlines: inside or out on tower?
>>>> 
>>>> After reading John's (KK9A, P40A) post regarding tower
>>>> painting, I have a
>>>> question for the group. While I would be hard pressed to
>>>> recall a tower I
>>>> have worked on that has not had its feedlines and control
>>>> cables run on the
>>>> inside of leg, it is obvious from his post that not everyone
>>>> does so. What
>>>> is the thinking behind running the cables on the inside or
>>>> the outside? BTW,
>>>> I've even seen hardline run on the inside of 45 and 55, glad
>>>> it wasn't me
>>>> who had to install it.
>>>> 
>>>> 73,
>>>> Jim W5QM
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