On Mon, Aug 20, 2012 at 5:10 AM, K8RI <K8RI-on-TowerTalk@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@contesting.com
>>> [mailto:towertalk-bounces@contesting.com] On Behalf Of Larry
>>> Sent: Sunday, August 19, 2012 11:39 AM
>>> To: towertalk@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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>>
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