[TowerTalk] Strange behavior

[Roger (K8RI) on TT]

Look a Northern MI, MI, MN, and mountainous regions. In some areas the 
declination is ridiculous. If you want the actual declination for an 
area spend some money and get an aeronautical chart for the region 
containing the specific location.  There are many, drastic, variations 
locally from the norm for that area.

If you are in any of the Northern states, be it New England, Mi or 
Montana, the declination changes, albeit slowly.
The declination here has gone from W to E, or the other way...I've 
forgotten as I haven't flown in close to 10 years. The point is, in the 
20 years I was an active pilot, the declination changed almost 10 degrees.
I've never noticed the skew others have mentioned, but I've never had 
antennas with a narrow beam width on 160, 75, or 40 and rarely work gray 
line on any band.

73, Roger (K8RI)


On 1/22/2017 12:15 PM, StellarCAT wrote:
> 15? Skewed?
>
> That would be quite a rarity. Most of the time signals on all bands 
> are direct with skew propagation being more common on the lower bands 
> and usually only at transition points - i.e. sunrise/sunset. Note to 
> those ready to pounce - I'm not saying it doesn't happen - it is just 
> much more infrequent and one should pretty well know most of the time 
> that EU is roughly at 45 deg.
>
> Magnetic deviation can account for up to about 12 deg in some places 
> in the US (here in the east 6 if I remember right, in AZ it was 11)...
>
> but by 45 deg?! That is REALLY strange...
>
> Gary
> K9RX
>
>
>
> -----Original Message----- From: Richard Solomon
> Sent: Sunday, January 22, 2017 11:23 AM
> To: towertalk
> Subject: Re: [TowerTalk] Strange behavior
>
> How about using the Compass App
> on your SmartPhone ?
>
> 73, Dick, W1KSZ
>
> On Sun, Jan 22, 2017 at 8:59 AM, <john at kk9a.com> wrote:
>
>> I am trying to avoid the true north thread however I would verify 
>> that they
>> are indeed pointing 45 degrees when you beam Europe. A compass can be
>> inaccurate around a lot of metal or if not level and it is measuring
>> magnetic north. If you use Google earth you can pick an object 45 
>> degrees
>> from your tower and see if you beam is pointing that direction. Since 
>> you
>> multiple towers and beams it is possible that something is skewing the
>> pattern or that you have skewed propagation under these poor 
>> conditions but
>> I would visually look at the direction one more time using a different
>> direction method.
>>
>> John KK9A
>>
>> To:     <towertalk at contesting.com>
>> Subject:        [TowerTalk] [SUSPECTED SPAM] Strange behavior
>> From:   "Carol Richards" <n2mm at comcast.net>
>> Date:   Fri, 20 Jan 2017 18:35:57 -0500
>>
>> Hello all,
>>
>> In late summer, I had some minor work done on my towers and antennas. I
>> used
>> a compass so that the beams were lined up correctly with N at 0 
>> degrees and
>> NE at 45 degrees,  EU direction. All monoband yagis have not loosened 
>> up,
>> but that EU now peaks at due East on all three yagis, separate 
>> towers, The
>> other directions behave properly; N to JA, W to the Pacific etc. Can 
>> anyone
>> explain why the change? There is about 15 db difference in signals 
>> from EU
>> at 90 degrees and EU at 45 degrees?
>>
>> I understand that EU on 15m would be skewed at this point in the 
>> cycle, but
>> 40m and 20m?
>>
>>
>>
>> Carol
>>
>> _______________________________________________
>>
>>
>>
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>
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-- 

73

Roger (K8RI)


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