W6ZKH
- Original Message -
From: Greg D. ko6th_g...@hotmail.com
To: ni...@ngunn.net
Cc: amsat-bb@amsat.org, n...@lavabit.com
Sent: Friday, August 14, 2009 10:41:00 PM GMT -08:00 US/Canada Pacific
Subject: [amsat-bb] Re: rotator questions
Hi Nigel,
In theory, yes, the Sun
Greetings!
This thread is bringing back memories.
Eons ago (60's) when I was servicing long range radar for the USAF
once a month the third shift crew would have to verify the proper
azimuth and elevation orientation of our antennas. We would stop all
antenna motion, stop transmitting and
PM
Subject: [amsat-bb] Re: rotator questions
How about aiming for maximum receiver noise? That should be even more
accurate.
Greg Wrote: and then adjust the antenna so the shadow falls directly
down the antenna boom.
___
Sent via amsat
How about aiming for maximum receiver noise? That should be even more accurate.
Greg Wrote: and then adjust the antenna so the shadow falls directly down
the antenna boom.
___
Sent via amsat...@amsat.org. Opinions expressed are those of the
Domenico
- Original Message -
From: Nigel Gunn G8IFF/W8IFF ni...@ngunn.net
To: Greg D. ko6th_g...@hotmail.com
Cc: amsat-bb@amsat.org; n...@lavabit.com
Sent: Thursday, August 13, 2009 2:17 PM
Subject: [amsat-bb] Re: rotator questions
How about aiming for maximum receiver noise? That should
Yes that's a good point, I'm not encouraging anyone to go on their roof at
night, in fact I would heartily discourage it for the sake of safety.
What I intended to mean was, I looked at Polaris at night, got the
difference from the way my house/roof points, then took that protractor up
to the
To find true north at your QTH:
Go to
http://www.usno.navy.mil/USNO/astronomical-applications/data-services/rs-one-day-us
Enter your nearest city and state into the menu
If you prefer to enter latitude and longitude, or if you are outside of the
USA, go to
Or go to:
http://www.usno.navy.mil/USNO/astronomical-applications/data-services/alt-az-us
enter your location and get the azimuth of the Sun for every 10 minutes so you
do not have to worry as much about clouds or trees, etc.
John WA4WDL
Daniel Schultz n8...@usa.net wrote:
To find
Joseph,
Check out this page:
http://www.thecompassstore.com/decvar.html#
There's a link on that page to plug in your Zip code and figure
declination, or
you can use the handy map on the main page.
For Austin, the magic number is 4 degrees.
If I recall correctly (it's been a few years), I set
One can also use Polaris (the North Star) at least in most of the northern
hemisphere where it is visible. A long time ago, I went outside after
dark and looked at how my house lined up with Polaris. In my case, it was
a dead sight along the front or back side and the peak of the roof to
Hi Joe and the group. IMHO when we get to discussing IGRF for mounting an
antenna and rotator for amateur radio use, we are over thinking this issue.
Now I must admit that I only have a 3 degree difference in EN19 which I
completely ignore. I find there is too much magnetic QRM around here to
My 2 cents.
Use a handheld GPS to align, or refer to a map. Reason: the Arrow is not a
small beamwidth antenna...don't put too much accuracy into alignment. Like
tracking pennies on a million dollar contract. Case in point: I took a TV
rotor into the unfinished attic of my house, taped it to
12 matches
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