[TowerTalk] Rotator loops was: Re: Feedline for a new tower

[N4ZR]

I've never understood typical ham practice of a hanging loop.  What 
Chuck describes is mechanically much superior.

73, Pete N4ZR
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On 11/11/2018 8:24 AM, Chuck Tifft via TowerTalk wrote:
> No need to transition. I just use about 2 to 3 turns of the LMR in 
> about a 12" diameter coil basically laying on the top of the tower. 
> That leaves plenty to absorb 360 degrees of rotation. In broadcast we 
> do it all the time with Heliax on live trucks.
>
> Chuck W6RD
>
>
> On 11/10/2018 7:45 PM, Steve Maki wrote:
>> LMR400 works well as a rotator loop if you dress it in with a 
>> relatively large hanging loop. Some setups aren't conducive to such a 
>> loop (i.e. top set of guys right at the top of the tower, etc). I 
>> always have 10' of tower above my top guys, so it's no problem.
>>
>> If you need a tight loop, use RG213 or Davis Buryflex.
>>
>> -Steve K8LX
>>
>> On 11/10/18 15:40 PM, Matt Frey wrote:
>>
>>> Looking for suggestions of what feedline to use on the 70' tower. HF 
>>> beam
>>> antenna that rotates.
>>>
>>> Total length of feedline to the radios would be 100'.
>>>
>>> Have been told to use LMR400 or RG123.  Need to transition to a more
>>> flexible cable at top of the tower for the rotation?
>>>
>>> Should ground the coax at top of the tower and at the surge 
>>> arrestors at
>>> the house wall 5 feet away?
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