[TowerTalk] ALIGNING ANTENNA

Fri Jan 1 16:23:08 EST 2021

I still think my first suggestion is the simplest and easiest - Loosen 
rotator clamps...verify actual antenna heading....while making sure the 
mast is completely free from turning, move controller (any brand) to 
agree with actual heading of the antenna then re-tighten clamps.  So, if 
the antenna was blown to a NW heading, the controller will now indicate 
the same. Should not affect rotor loop or anything else. You essentially 
are just getting the controller to catch up with the new wind induced 
antenna heading.

73, Dave - W3NP

On 1/1/2021 4:00 PM, Tim Duffy wrote:
> There is a pot in that HAM IV for direction - and limit switches. If you set the Green Heron make up for the miss alignment - there will be a dead zone.
>
> 73
> Tim K3LR
>
> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of Dave - W3NP
> Sent: Friday, January 1, 2021 3:21 PM
> To: towertalk at contesting.com
> Subject: Re: [TowerTalk] ALIGNING ANTENNA
>
> It absolutely will....Just go to the first menu option called
> "calibrate" and set the Green Heron to read the position that you
> antenna is currently at. No need to do anything outside except verify
> the actual antenna heading. I like to use Polaris (the north star) here.
> But most smartphones can run a free compass app set for "true north" not
> magnetic north which is a 10 degree difference here.
>
> 73, Dave - W3NP
>
>
> On 1/1/2021 2:57 PM, Dale M. Schwartz wrote:
>> I have a Green Heren controller on order. Will that make any difference?
>>                     Dale/K4ROZ
>>
>>
>> [X]
>>
>> Dale M. Schwartz
>> SCHWARTZ | POSEL
>> Immigration Law Group
>> Suite 450 RiverEdge One
>> 5500 Interstate North Pkwy., NW
>> Atlanta, GA 30328
>>
>> Tel:   770 951-1100
>> Fax: 770 951-1113
>> www.immlawfirm.com
>>
>>      PAST PRESIDENT: AMERICAN
>> IMMIGRATION LAWYERS ASS'N
>>     ADJUNCT PROFESSOR: EMORY UNIVERSITY SCHOOL OF LAW (1989-2014)
>>
>>
>>
>>
>> On Jan 1, 2021, at 2:11 PM, Joe Subich, W4TV <lists at subich.com> wrote:
>>
>> On 2021-01-01 1:53 PM, Les Brown wrote:
>>
>>>       I don't understand why you think it isn't right.
>> Simply put, the Hy-Gain controller does not have a correction for
>> magnetic north and the Hy-Gain rotators have only 360 degree rotation.
>>
>> If the antenna is 30 degrees off alignment and one adjusts the "north"
>> position using the "calibrate" pot, the heading will be correct at
>> north but will be off by a variable amount in the rest of the range -
>> depending on whether the 30 degrees is clockwise or counter clockwise
>> the indicator will show "south" (assuming the typical north centered
>> scale) when the rotator is at 210 degrees (CCW limit) and "south" for
>> 180 to 210 degrees (CW limit) or "south" for 150 (CCW limit) to 180
>> and "south" at 150 (CW limit).
>>
>> 73,
>>
>>     ... Joe, W4TV
>>
>>
>> On 2021-01-01 1:53 PM, Les Brown wrote:
>> John,
>>      I don't understand why you think it isn't right. The magnetic north offset is a fixed offset for a given location. If your correct offset is let's say 10 degrees and you have a misaligned antenna that is another 20 degrees off in the same direction, why not just set the parameter to 30 degrees and not worry about having to physically realign the mast? The only concern I can see is if you don't have enough of a coax loop for the extra rotation.
>> 73, Les VE3NNT
>> -----Original Message-----
>> From: JOHN OWENS [mailto:ham38john at comcast.net]
>> Sent: Friday, January 01, 2021 1:04 PM
>> To: Les Brown <lesbrown at sympatico.ca>; Dale M. Schwartz <dale at immlawfirm.com>; towertalk at contesting.com
>> Subject: Re: [TowerTalk] ALIGNING ANTENNA
>> I kinda don't think that is right. Besides, the offset btwn mag and true is unique to each location. -  John Owens -  N7TK
>> On 01/01/2021 9:42 AM Les Brown <lesbrown at sympatico.ca> wrote:
>>
>>    Dale,
>>      Most rotor controllers have an offset for true north vs magnetic north. Why don't you just adjust this parameter?
>> 73, Les VE3NNT
>>
>> -----Original Message-----
>> From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of Dale M. Schwartz
>> Sent: Friday, January 01, 2021 12:22 PM
>> To: towertalk at contesting.com
>> Subject: [TowerTalk] ALIGNING ANTENNA
>>
>> I just replaced my rotor (with a HAM-IV) on the bottom of my US Tower 55’ flagpole with a SteppIR on top. The old rotor was off the tower for a few weeks and I suspect the wind blew the beam a little.
>>       Now my bearings are about 30-40 degrees off. So when my controller says I am pointed due North, the beam is actually pointed NNW.
>>       I know we could lower the tower and repoint the beam. But I’m looking for suggestions on how to reorient the antenna from the ground.
>>        Any thoughts would be appreciated.
>>        HAPPY NEW YEAR!
>>                    Dale/K4ROZ
>>
>>
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