Date   

Re: I-Phone compass.

groupio@...
 

The sun might be a good way of finding the satellite. To find south for a telescope you can lookup tables of when the sun is due south from your location. For a telescope it needs to be very accurate. It should have somewhere on the Internet a figure for when the sun is the same place as Oscar 100. At two times a year it is directly behind Oscar 100 from my location if not everyones. Obviously every other day it will be above or below the satellite vertically.

Martin - G8LCE


Re: I-Phone compass.

Martyn G3UKV
 

Hi All
Worth mentioning - some Samsung phones do not have the required sensor for the compass app to work - eg my Galaxy J5 (2016 version). So it's useless for "Skymap" too, which is a shame.
73 Martyn G3UKV

On 31/07/2019 19:47, Michael Scott via Groups.Io wrote:
Hi All
 
I have been trying to use my i-phone compass to set up a dish for QO-100 and am getting funny results. Quite often when I open the app the compass shows totally erroneous readings, ie 90 degrees error. I watched a U-tube video which said that the compass had to be calibrated at least once every 24 hours by rotating it in the vertical plane through 90 degrees leaving it there for 5 seconds and then continue doing this until completing 360 degrees. It then had to be turned face down for 5 secs and then face up for another 5 secs. This process seemed to get it to point in the right direction for North, but not sure how accurate the readings would be.
 
The chat on the internet is confusing, some say it is a rubbish app, and others say it is OK.
 
The reason I wanted to use it rather than a simple magnetic compass was that I thought it used gps rather than the earth’s magnetic field, and so would not be affected by steel in a dish or other nearby metalwork. Someone said it contained a magnetometer which, if correct, would mean that it is NOT immune to ferrous metals.
 
Can anyone say for sure how it works?
 
Another question, sometimes the scale turns red as it is rotated. What does this mean?
 
I have a little book on the i-phone, but it doesn’t even mention the compass.
 
Thanks in advance!
 
73, G3LYP.
 
 


Re: I-Phone compass.

Andy G4JNT
 

That's what I was trying to say about mine, too.
Tried to take a photo of mine doing it, but it cal'ed itself before I was able to press the shutter



On Thu, 1 Aug 2019 at 08:50, g3zqu via Groups.Io <g3zqu=btinternet.com@groups.io> wrote:
On my iphone you are told to roll the red segment around the compass rose, by tilting and rotating the phone. This calibrates the compass for use.
Martin G3ZQU


Re: I-Phone compass.

Oguzhan Kayhan
 

To use GPS for directions, you need to be moving or, you need to use two gps receivers and calculate the real direction. Most Marine gps system uses second  way.  Sure there need to be some space between this two antennas for accuracy.

For phones, there is magnetometer and need to make calibration before usage.
It gets first information from GPS to use with the magnetometer location, the calculates the true north according to this knowledge..
But it won't be accurate enough to point your dish directly. 

WHat I do, use phones compass to make an approximate direction of EsHail (there is satellite finder applications for android.that can point you to az and el )
Turn on my sdr and make small moves on the antenna for accurate alignment while observing the beacon frequency for best signal strength.

Regards
TA2NC


On Thu, Aug 1, 2019 at 12:56 AM Michael Scott via Groups.Io <g3lyp=btinternet.com@groups.io> wrote:
Thanks Andy, Dave and John.
 
As it is actually based on a magnetometer, there probably is no advantage over a standard compass when it comes to interference from steel objects. Don’t quite follow your comment about the red circle. When I open the app it goes straight to the compass dial. Sometimes when I move it, a red segment appears. Is this part of the calibration process?
Sorry to appear a bit dense, it is my first smart phone and I bought it because it was on offer as this version ( SE?) is being discontinued.
 
73, Mike.
 
From: Andy G4JNT
Sent: Wednesday, July 31, 2019 8:09 PM
To: UK Microwaves groups.io
Subject: Re: [UKMicrowaves] I-Phone compass.
 
Forgot to add ...
You can't use GPS to get bearing, unless you actually move the sensor.   There is nothing in the GPS signal or system that can give bearing, only exact location.   You have to work out bearing from change of location
  
 
 
On Wed, 31 Jul 2019 at 20:07, Andy G4JNT via Groups.Io <andy.g4jnt@...> wrote:
I have an old Iphone-4 and the compass is excellent. It is accessible via the "Extras" menu item.
Assuming your, presumably more modern version is much the same, your red screen is the calibration process.   Forget whet you read - it tells you what to do for cal.
 
Roll the marker around the red circle, this is calibrating the X, Y and Z magnetometers.   As the marker rolls around, the line builds up and when completed, will jump to a compass display.   I've checked it on hill tops, against visible sites calculated using the 'Locate'  software by G4EML running on the same unit.   In fact, 'Locate' has a compass facility built in, so you can calculate bearing to a site, and use the compass directly to find it.
 
Provided there is no ferrous metalwork to distort the reading, I find it generally good to around 1 - 2 degrees. And that's knowing the mag var only to around 1 deg.

 
 
On Wed, 31 Jul 2019 at 19:47, Michael Scott via Groups.Io <g3lyp@...> wrote:
Hi All
 
I have been trying to use my i-phone compass to set up a dish for QO-100 and am getting funny results. Quite often when I open the app the compass shows totally erroneous readings, ie 90 degrees error. I watched a U-tube video which said that the compass had to be calibrated at least once every 24 hours by rotating it in the vertical plane through 90 degrees leaving it there for 5 seconds and then continue doing this until completing 360 degrees. It then had to be turned face down for 5 secs and then face up for another 5 secs. This process seemed to get it to point in the right direction for North, but not sure how accurate the readings would be.
 
The chat on the internet is confusing, some say it is a rubbish app, and others say it is OK.
 
The reason I wanted to use it rather than a simple magnetic compass was that I thought it used gps rather than the earth’s magnetic field, and so would not be affected by steel in a dish or other nearby metalwork. Someone said it contained a magnetometer which, if correct, would mean that it is NOT immune to ferrous metals.
 
Can anyone say for sure how it works?
 
Another question, sometimes the scale turns red as it is rotated. What does this mean?
 
I have a little book on the i-phone, but it doesn’t even mention the compass.
 
Thanks in advance!
 
73, G3LYP.
 
 


Re: I-Phone compass.

Frank, G0GSR
 

I would suggest aiming this dish using "Dishpointer" as a first step.
If you can find a landmark in line with your intended bearing, its very useful.
I think it has most sats covered or will get you very close.

Frank


Re: I-Phone compass.

Michael Scott
 

Hi Stephen, Yes, my case has a magnetic closure, so I have to take it out of the case.
 
Mike.
 

From: Stephen Tompsett
Sent: Thursday, August 1, 2019 8:12 AM
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] I-Phone compass.
 

With my (old) Nexus-5 the compass works very well, as long as I don't use a protective case which has magnets in it to automatically switch the device on when the cover is opened, or to latch the cover shut...!

Tumbling the phone around each axis before trying to take a bearing helps to calibrate the sensor.

On 31/07/2019 22:56, Michael Scott via Groups.Io wrote:
Thanks Andy, Dave and John.
 
As it is actually based on a magnetometer, there probably is no advantage over a standard compass when it comes to interference from steel objects. Don’t quite follow your comment about the red circle. When I open the app it goes straight to the compass dial. Sometimes when I move it, a red segment appears. Is this part of the calibration process?
Sorry to appear a bit dense, it is my first smart phone and I bought it because it was on offer as this version ( SE?) is being discontinued.
 
73, Mike.
 
From: Andy G4JNT
Sent: Wednesday, July 31, 2019 8:09 PM
To: UK Microwaves groups.io
Subject: Re: [UKMicrowaves] I-Phone compass.
 
Forgot to add ...
You can't use GPS to get bearing, unless you actually move the sensor.   There is nothing in the GPS signal or system that can give bearing, only exact location.   You have to work out bearing from change of location
  
 
 
On Wed, 31 Jul 2019 at 20:07, Andy G4JNT via Groups.Io <andy.g4jnt@...> wrote:
I have an old Iphone-4 and the compass is excellent. It is accessible via the "Extras" menu item.
Assuming your, presumably more modern version is much the same, your red screen is the calibration process.   Forget whet you read - it tells you what to do for cal.
 
Roll the marker around the red circle, this is calibrating the X, Y and Z magnetometers.   As the marker rolls around, the line builds up and when completed, will jump to a compass display.   I've checked it on hill tops, against visible sites calculated using the 'Locate'  software by G4EML running on the same unit.   In fact, 'Locate' has a compass facility built in, so you can calculate bearing to a site, and use the compass directly to find it.
 
Provided there is no ferrous metalwork to distort the reading, I find it generally good to around 1 - 2 degrees. And that's knowing the mag var only to around 1 deg.
 
 
 
On Wed, 31 Jul 2019 at 19:47, Michael Scott via Groups.Io <g3lyp=btinternet.com@groups.io> wrote:
Hi All
 
I have been trying to use my i-phone compass to set up a dish for QO-100 and am getting funny results. Quite often when I open the app the compass shows totally erroneous readings, ie 90 degrees error. I watched a U-tube video which said that the compass had to be calibrated at least once every 24 hours by rotating it in the vertical plane through 90 degrees leaving it there for 5 seconds and then continue doing this until completing 360 degrees. It then had to be turned face down for 5 secs and then face up for another 5 secs. This process seemed to get it to point in the right direction for North, but not sure how accurate the readings would be.
 
The chat on the internet is confusing, some say it is a rubbish app, and others say it is OK.
 
The reason I wanted to use it rather than a simple magnetic compass was that I thought it used gps rather than the earth’s magnetic field, and so would not be affected by steel in a dish or other nearby metalwork. Someone said it contained a magnetometer which, if correct, would mean that it is NOT immune to ferrous metals.
 
Can anyone say for sure how it works?
 
Another question, sometimes the scale turns red as it is rotated. What does this mean?
 
I have a little book on the i-phone, but it doesn’t even mention the compass.
 
Thanks in advance!
 
73, G3LYP.
 
 
-- 
Stephen Tompsett


Re: I-Phone compass.

Michael Scott
 

Thanks for the info Martin, I will try that!
 

From: g3zqu via Groups.Io
Sent: Thursday, August 1, 2019 8:53 AM
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] I-Phone compass.
 
On my iphone you are told to roll the red segment around the compass rose, by tilting and rotating the phone. This calibrates the compass for use.
Martin G3ZQU


Re: I-Phone compass.

g3zqu
 

On my iphone you are told to roll the red segment around the compass rose, by tilting and rotating the phone. This calibrates the compass for use.
Martin G3ZQU


Re: I-Phone compass.

Stephen Tompsett
 

With my (old) Nexus-5 the compass works very well, as long as I don't use a protective case which has magnets in it to automatically switch the device on when the cover is opened, or to latch the cover shut...!

Tumbling the phone around each axis before trying to take a bearing helps to calibrate the sensor.

On 31/07/2019 22:56, Michael Scott via Groups.Io wrote:
Thanks Andy, Dave and John.
 
As it is actually based on a magnetometer, there probably is no advantage over a standard compass when it comes to interference from steel objects. Don’t quite follow your comment about the red circle. When I open the app it goes straight to the compass dial. Sometimes when I move it, a red segment appears. Is this part of the calibration process?
Sorry to appear a bit dense, it is my first smart phone and I bought it because it was on offer as this version ( SE?) is being discontinued.
 
73, Mike.
 
From: Andy G4JNT
Sent: Wednesday, July 31, 2019 8:09 PM
To: UK Microwaves groups.io
Subject: Re: [UKMicrowaves] I-Phone compass.
 
Forgot to add ...
You can't use GPS to get bearing, unless you actually move the sensor.   There is nothing in the GPS signal or system that can give bearing, only exact location.   You have to work out bearing from change of location
  
Andy
 
 
 
On Wed, 31 Jul 2019 at 20:07, Andy G4JNT via Groups.Io <andy.g4jnt@...> wrote:
I have an old Iphone-4 and the compass is excellent. It is accessible via the "Extras" menu item.
Assuming your, presumably more modern version is much the same, your red screen is the calibration process.   Forget whet you read - it tells you what to do for cal.
 
Roll the marker around the red circle, this is calibrating the X, Y and Z magnetometers.   As the marker rolls around, the line builds up and when completed, will jump to a compass display.   I've checked it on hill tops, against visible sites calculated using the 'Locate'  software by G4EML running on the same unit.   In fact, 'Locate' has a compass facility built in, so you can calculate bearing to a site, and use the compass directly to find it.
 
Provided there is no ferrous metalwork to distort the reading, I find it generally good to around 1 - 2 degrees. And that's knowing the mag var only to around 1 deg.

Andy
 
 
 
On Wed, 31 Jul 2019 at 19:47, Michael Scott via Groups.Io <g3lyp=btinternet.com@groups.io> wrote:
Hi All
 
I have been trying to use my i-phone compass to set up a dish for QO-100 and am getting funny results. Quite often when I open the app the compass shows totally erroneous readings, ie 90 degrees error. I watched a U-tube video which said that the compass had to be calibrated at least once every 24 hours by rotating it in the vertical plane through 90 degrees leaving it there for 5 seconds and then continue doing this until completing 360 degrees. It then had to be turned face down for 5 secs and then face up for another 5 secs. This process seemed to get it to point in the right direction for North, but not sure how accurate the readings would be.
 
The chat on the internet is confusing, some say it is a rubbish app, and others say it is OK.
 
The reason I wanted to use it rather than a simple magnetic compass was that I thought it used gps rather than the earth’s magnetic field, and so would not be affected by steel in a dish or other nearby metalwork. Someone said it contained a magnetometer which, if correct, would mean that it is NOT immune to ferrous metals.
 
Can anyone say for sure how it works?
 
Another question, sometimes the scale turns red as it is rotated. What does this mean?
 
I have a little book on the i-phone, but it doesn’t even mention the compass.
 
Thanks in advance!
 
73, G3LYP.
 
 
-- 
Stephen Tompsett


Re: I-Phone compass.

Michael Scott
 

Thanks Andy, Dave and John.
 
As it is actually based on a magnetometer, there probably is no advantage over a standard compass when it comes to interference from steel objects. Don’t quite follow your comment about the red circle. When I open the app it goes straight to the compass dial. Sometimes when I move it, a red segment appears. Is this part of the calibration process?
Sorry to appear a bit dense, it is my first smart phone and I bought it because it was on offer as this version ( SE?) is being discontinued.
 
73, Mike.
 

From: Andy G4JNT
Sent: Wednesday, July 31, 2019 8:09 PM
To: UK Microwaves groups.io
Subject: Re: [UKMicrowaves] I-Phone compass.
 
Forgot to add ...
You can't use GPS to get bearing, unless you actually move the sensor.   There is nothing in the GPS signal or system that can give bearing, only exact location.   You have to work out bearing from change of location
  
 
 
On Wed, 31 Jul 2019 at 20:07, Andy G4JNT via Groups.Io <andy.g4jnt@...> wrote:
I have an old Iphone-4 and the compass is excellent. It is accessible via the "Extras" menu item.
Assuming your, presumably more modern version is much the same, your red screen is the calibration process.   Forget whet you read - it tells you what to do for cal.
 
Roll the marker around the red circle, this is calibrating the X, Y and Z magnetometers.   As the marker rolls around, the line builds up and when completed, will jump to a compass display.   I've checked it on hill tops, against visible sites calculated using the 'Locate'  software by G4EML running on the same unit.   In fact, 'Locate' has a compass facility built in, so you can calculate bearing to a site, and use the compass directly to find it.
 
Provided there is no ferrous metalwork to distort the reading, I find it generally good to around 1 - 2 degrees. And that's knowing the mag var only to around 1 deg.

 
 
On Wed, 31 Jul 2019 at 19:47, Michael Scott via Groups.Io <g3lyp=btinternet.com@groups.io> wrote:
Hi All
 
I have been trying to use my i-phone compass to set up a dish for QO-100 and am getting funny results. Quite often when I open the app the compass shows totally erroneous readings, ie 90 degrees error. I watched a U-tube video which said that the compass had to be calibrated at least once every 24 hours by rotating it in the vertical plane through 90 degrees leaving it there for 5 seconds and then continue doing this until completing 360 degrees. It then had to be turned face down for 5 secs and then face up for another 5 secs. This process seemed to get it to point in the right direction for North, but not sure how accurate the readings would be.
 
The chat on the internet is confusing, some say it is a rubbish app, and others say it is OK.
 
The reason I wanted to use it rather than a simple magnetic compass was that I thought it used gps rather than the earth’s magnetic field, and so would not be affected by steel in a dish or other nearby metalwork. Someone said it contained a magnetometer which, if correct, would mean that it is NOT immune to ferrous metals.
 
Can anyone say for sure how it works?
 
Another question, sometimes the scale turns red as it is rotated. What does this mean?
 
I have a little book on the i-phone, but it doesn’t even mention the compass.
 
Thanks in advance!
 
73, G3LYP.
 
 


Re: I-Phone compass.

John E. Beech
 

Hi Andy & Dave,
I've just downloaded a free compass app for the Android operating system. It seemed to take a while to settle but does point in the right direction eventually. My conventional compass settles quite quickly and is much steadier. The app compass hunts plus and minus one degree all the time ( compass resting on the table, not hand held). Both instruments agree with my perception of where North is from previous observations of the Pole Star from this location. There was nothing before or after the download that said anything about calibration.

de John G8SEQ

-------Original Message-------
From: Dave via Groups.Io <drdavidnewman=btinternet.com@groups.io>
To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] I-Phone compass.
Sent: Jul 31 '19 20:45

Hello ,
I use Commander on my iPhone and find it excellent as a compass, and
it is free I believe. As far as everything else is concerned regarding
amateur radio I use a Windows laptop
as I have found that it is so easy with Windows but a real bind with
Apple programs that are quite complicated and difficult to get them to
work with things like KSTMe.
73
Dave G4GLT

On 31 Jul 2019, at 20:07, Andy G4JNT <andy.g4jnt@gmail.com> wrote:

> I have an old Iphone-4 and the compass is excellent. It is
> accessible via the "Extras" menu item.
> Assuming your, presumably more modern version is much the same,
> your red screen is the calibration process. Forget whet you read -
> it tells you what to do for cal.
>
> Roll the marker around the red circle, this is calibrating the X, Y
> and Z magnetometers. As the marker rolls around, the line builds up
> and when completed, will jump to a compass display. I've checked it
> on hill tops, against visible sites calculated using the 'Locate'
> software by G4EML running on the same unit. In fact, 'Locate' has a
> compass facility built in, so you can calculate bearing to a site,
> and use the compass directly to find it.
>
> Provided there is no ferrous metalwork to distort the reading, I
> find it generally good to around 1 - 2 degrees. And that's knowing
> the mag var only to around 1 deg.
>
> Andy
> www.g4jnt.com
>
> On Wed, 31 Jul 2019 at 19:47, Michael Scott via Groups.Io
> <g3lyp=btinternet.com@groups.io> wrote:
>
>> Hi All
>>
>> I have been trying to use my i-phone compass to set up a dish for
>> QO-100 and am getting funny results. Quite often when I open the
>> app the compass shows totally erroneous readings, ie 90 degrees
>> error. I watched a U-tube video which said that the compass had to
>> be calibrated at least once every 24 hours by rotating it in the
>> vertical plane through 90 degrees leaving it there for 5 seconds
>> and then continue doing this until completing 360 degrees. It then
>> had to be turned face down for 5 secs and then face up for another
>> 5 secs. This process seemed to get it to point in the right
>> direction for North, but not sure how accurate the readings would
>> be.
>>
>> The chat on the internet is confusing, some say it is a rubbish
>> app, and others say it is OK.
>>
>> The reason I wanted to use it rather than a simple magnetic
>> compass was that I thought it used gps rather than the earth’s
>> magnetic field, and so would not be affected by steel in a dish or
>> other nearby metalwork. Someone said it contained a magnetometer
>> which, if correct, would mean that it is NOT immune to ferrous
>> metals.
>>
>> Can anyone say for sure how it works?
>>
>> Another question, sometimes the scale turns red as it is rotated.
>> What does this mean?
>>
>> I have a little book on the i-phone, but it doesn’t even mention
>> the compass.
>>
>> Thanks in advance!
>>
>> 73, G3LYP.


Re: I-Phone compass.

Dave
 

Hello ,
I use Commander on my iPhone and find it excellent as a compass, and it is free I believe. As far as everything else is concerned regarding amateur radio I use a Windows laptop
as I have found that it is so easy with Windows but a real bind with Apple programs that are quite complicated and difficult to get them to work with things like KSTMe.
73 
Dave G4GLT 


On 31 Jul 2019, at 20:07, Andy G4JNT <andy.g4jnt@...> wrote:

I have an old Iphone-4 and the compass is excellent. It is accessible via the "Extras" menu item.
 Assuming your, presumably more modern version is much the same, your red screen is the calibration process.   Forget whet you read - it tells you what to do for cal.

Roll the marker around the red circle, this is calibrating the X, Y and Z magnetometers.   As the marker rolls around, the line builds up and when completed, will jump to a compass display.   I've checked it on hill tops, against visible sites calculated using the 'Locate'  software by G4EML running on the same unit.   In fact, 'Locate' has a compass facility built in, so you can calculate bearing to a site, and use the compass directly to find it.
 
Provided there is no ferrous metalwork to distort the reading, I find it generally good to around 1 - 2 degrees. And that's knowing the mag var only to around 1 deg.
  


On Wed, 31 Jul 2019 at 19:47, Michael Scott via Groups.Io <g3lyp=btinternet.com@groups.io> wrote:
Hi All
 
I have been trying to use my i-phone compass to set up a dish for QO-100 and am getting funny results. Quite often when I open the app the compass shows totally erroneous readings, ie 90 degrees error. I watched a U-tube video which said that the compass had to be calibrated at least once every 24 hours by rotating it in the vertical plane through 90 degrees leaving it there for 5 seconds and then continue doing this until completing 360 degrees. It then had to be turned face down for 5 secs and then face up for another 5 secs. This process seemed to get it to point in the right direction for North, but not sure how accurate the readings would be.
 
The chat on the internet is confusing, some say it is a rubbish app, and others say it is OK.
 
The reason I wanted to use it rather than a simple magnetic compass was that I thought it used gps rather than the earth’s magnetic field, and so would not be affected by steel in a dish or other nearby metalwork. Someone said it contained a magnetometer which, if correct, would mean that it is NOT immune to ferrous metals.
 
Can anyone say for sure how it works?
 
Another question, sometimes the scale turns red as it is rotated. What does this mean?
 
I have a little book on the i-phone, but it doesn’t even mention the compass.
 
Thanks in advance!
 
73, G3LYP.
 
 


Re: I-Phone compass.

Andy G4JNT
 

Forgot to add ... 
You can't use GPS to get bearing, unless you actually move the sensor.   There is nothing in the GPS signal or system that can give bearing, only exact location.   You have to work out bearing from change of location
   


On Wed, 31 Jul 2019 at 20:07, Andy G4JNT via Groups.Io <andy.g4jnt=gmail.com@groups.io> wrote:
I have an old Iphone-4 and the compass is excellent. It is accessible via the "Extras" menu item.
 Assuming your, presumably more modern version is much the same, your red screen is the calibration process.   Forget whet you read - it tells you what to do for cal.

Roll the marker around the red circle, this is calibrating the X, Y and Z magnetometers.   As the marker rolls around, the line builds up and when completed, will jump to a compass display.   I've checked it on hill tops, against visible sites calculated using the 'Locate'  software by G4EML running on the same unit.   In fact, 'Locate' has a compass facility built in, so you can calculate bearing to a site, and use the compass directly to find it.
 
Provided there is no ferrous metalwork to distort the reading, I find it generally good to around 1 - 2 degrees. And that's knowing the mag var only to around 1 deg.
  


On Wed, 31 Jul 2019 at 19:47, Michael Scott via Groups.Io <g3lyp=btinternet.com@groups.io> wrote:
Hi All
 
I have been trying to use my i-phone compass to set up a dish for QO-100 and am getting funny results. Quite often when I open the app the compass shows totally erroneous readings, ie 90 degrees error. I watched a U-tube video which said that the compass had to be calibrated at least once every 24 hours by rotating it in the vertical plane through 90 degrees leaving it there for 5 seconds and then continue doing this until completing 360 degrees. It then had to be turned face down for 5 secs and then face up for another 5 secs. This process seemed to get it to point in the right direction for North, but not sure how accurate the readings would be.
 
The chat on the internet is confusing, some say it is a rubbish app, and others say it is OK.
 
The reason I wanted to use it rather than a simple magnetic compass was that I thought it used gps rather than the earth’s magnetic field, and so would not be affected by steel in a dish or other nearby metalwork. Someone said it contained a magnetometer which, if correct, would mean that it is NOT immune to ferrous metals.
 
Can anyone say for sure how it works?
 
Another question, sometimes the scale turns red as it is rotated. What does this mean?
 
I have a little book on the i-phone, but it doesn’t even mention the compass.
 
Thanks in advance!
 
73, G3LYP.
 
 


Re: I-Phone compass.

Andy G4JNT
 

I have an old Iphone-4 and the compass is excellent. It is accessible via the "Extras" menu item.
 Assuming your, presumably more modern version is much the same, your red screen is the calibration process.   Forget whet you read - it tells you what to do for cal.

Roll the marker around the red circle, this is calibrating the X, Y and Z magnetometers.   As the marker rolls around, the line builds up and when completed, will jump to a compass display.   I've checked it on hill tops, against visible sites calculated using the 'Locate'  software by G4EML running on the same unit.   In fact, 'Locate' has a compass facility built in, so you can calculate bearing to a site, and use the compass directly to find it.
 
Provided there is no ferrous metalwork to distort the reading, I find it generally good to around 1 - 2 degrees. And that's knowing the mag var only to around 1 deg.
  


On Wed, 31 Jul 2019 at 19:47, Michael Scott via Groups.Io <g3lyp=btinternet.com@groups.io> wrote:
Hi All
 
I have been trying to use my i-phone compass to set up a dish for QO-100 and am getting funny results. Quite often when I open the app the compass shows totally erroneous readings, ie 90 degrees error. I watched a U-tube video which said that the compass had to be calibrated at least once every 24 hours by rotating it in the vertical plane through 90 degrees leaving it there for 5 seconds and then continue doing this until completing 360 degrees. It then had to be turned face down for 5 secs and then face up for another 5 secs. This process seemed to get it to point in the right direction for North, but not sure how accurate the readings would be.
 
The chat on the internet is confusing, some say it is a rubbish app, and others say it is OK.
 
The reason I wanted to use it rather than a simple magnetic compass was that I thought it used gps rather than the earth’s magnetic field, and so would not be affected by steel in a dish or other nearby metalwork. Someone said it contained a magnetometer which, if correct, would mean that it is NOT immune to ferrous metals.
 
Can anyone say for sure how it works?
 
Another question, sometimes the scale turns red as it is rotated. What does this mean?
 
I have a little book on the i-phone, but it doesn’t even mention the compass.
 
Thanks in advance!
 
73, G3LYP.
 
 


I-Phone compass.

Michael Scott
 

Hi All
 
I have been trying to use my i-phone compass to set up a dish for QO-100 and am getting funny results. Quite often when I open the app the compass shows totally erroneous readings, ie 90 degrees error. I watched a U-tube video which said that the compass had to be calibrated at least once every 24 hours by rotating it in the vertical plane through 90 degrees leaving it there for 5 seconds and then continue doing this until completing 360 degrees. It then had to be turned face down for 5 secs and then face up for another 5 secs. This process seemed to get it to point in the right direction for North, but not sure how accurate the readings would be.
 
The chat on the internet is confusing, some say it is a rubbish app, and others say it is OK.
 
The reason I wanted to use it rather than a simple magnetic compass was that I thought it used gps rather than the earth’s magnetic field, and so would not be affected by steel in a dish or other nearby metalwork. Someone said it contained a magnetometer which, if correct, would mean that it is NOT immune to ferrous metals.
 
Can anyone say for sure how it works?
 
Another question, sometimes the scale turns red as it is rotated. What does this mean?
 
I have a little book on the i-phone, but it doesn’t even mention the compass.
 
Thanks in advance!
 
73, G3LYP.
 
 


Re: Just a suggestion

Adrian G4UVZ
 

Tony..Thank you ..it would appear that it was an old serer issue!


Re: Just a suggestion

Ralph
 

You can set up two windows , the top one is the general traffic activity and the second one is only directed at you

So you do not loose the information when its busy, but nationality does not enter into this one bit hi

Check the Setup in the tools you will see the option to have “Chat 2” enabled put “filtered” as your preference.

 

73

Ralph G4ALY

 

 

Sent from Mail for Windows 10

 

From: Adrian G4UVZ via Groups.Io
Sent: 30 July 2019 17:59
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Just a suggestion

 

Well have revived my KSTME,,,,,but there is an awful lot of european traffic on there .. even on a school day!

Is there a way to just see UK stations?

Otherwise they are lost in the EU !! Maybe a BREXIT filter!!!

A

 


Virus-free. www.avg.com


Re: Just a suggestion

Adrian G4UVZ
 

Well have revived my KSTME,,,,,but there is an awful lot of european traffic on there .. even on a school day!

Is there a way to just see UK stations?

Otherwise they are lost in the EU !! Maybe a BREXIT filter!!!

A


Re: Just a suggestion

Tom GM8MJV
 

 
Regarding the original question from John – I don’t think that KST2ME lets you change your locator but easy to do from ON4KST web interface, maybe that’s the reason?
 

All

Just happening to be in KST2ME for something else - yes there is a menu option (Commands - Change own locator) to allow you to change it.  It’s pretty easy :-)

Tom


--
73’s

Tom
GM8MJV (IO85)







Re: OSCAR 100 Dual feed dielectric lens

Adrian G4AZS
 

On Mon, Jul 29, 2019 at 02:48 PM, <polishamps@...> wrote:
"I bought a kit poty and it had the conical lens supplied but I found that with my setup a lens from a rocket LNB worked better".

That is consistent with the data in the photo posted by Jerry higher up this thread - which suggests that the rocket lens might perform better than the poty supplied lens (as tested by PE1CKK)

Your forum post was interesting and encouraging, thanks!

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