Please don't ya'll laugh too hard at me. Has anyone ever mounted a camera on a beam? Now I am not trying to see AO40, but I would like to simply double check the location of my beam for eme. If anyone has mounted a camera on a beam, I would be interested in what you used. Yes, I know all about beam width vs the moon. I just hate to call CQ with my beams pointed to the ground due to some Murphy type of failure.
73, -james W5AOO
That's cool idea Jim...could even aim it at the neighbors 73 Bob W7LRD
----- Original Message ----- From: "James Luhn" luhn@wt.net To: amsat-bb@amsat.org Sent: Saturday, September 8, 2012 10:22:21 AM Subject: [amsat-bb] Camera on an antenna
Please don't ya'll laugh too hard at me. Has anyone ever mounted a camera on a beam? Now I am not trying to see AO40, but I would like to simply double check the location of my beam for eme. If anyone has mounted a camera on a beam, I would be interested in what you used. Yes, I know all about beam width vs the moon. I just hate to call CQ with my beams pointed to the ground due to some Murphy type of failure.
73, -james W5AOO _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Greg, KO6TH, has done this.
I've got enough stuff to do it, and now that my antennas are down, I might add a camera to the cross-boom.
Here's Greg's website: http://home.wavecable.com/~ko6th/
73, Jim KQ6EA
On 09/08/2012 05:22 PM, James Luhn wrote:
Please don't ya'll laugh too hard at me. Has anyone ever mounted a camera on a beam? Now I am not trying to see AO40, but I would like to simply double check the location of my beam for eme. If anyone has mounted a camera on a beam, I would be interested in what you used. Yes, I know all about beam width vs the moon. I just hate to call CQ with my beams pointed to the ground due to some Murphy type of failure.
73, -james W5AOO _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Yes, I've done that.
Only on a dx-pedition but it was also for EME.
I used a camera that needed to be plugged into 12V and produced a black and white image in video format so it could be sent straight to a monitor.
What I found was that the moon was quite small on the screen and it wasn't obvious where to point the 4 x 19 ele yagis for 70cm. The solution.....Easy. Go outside and look down the booms and when I was happy it was in the right direction, go back inside and mark a cross with a felt tip marker on the TV screen.
Worked just fine. If you are really 'keen' you can add a circle around the cross representing the -3dB points.
73
David G0MRF
-----Original Message----- From: James Luhn luhn@wt.net To: amsat-bb amsat-bb@amsat.org Sent: Sat, 8 Sep 2012 18:38 Subject: [amsat-bb] Camera on an antenna
Please don't ya'll laugh too hard at me. Has anyone ever mounted a camera on a beam? Now I am not trying to see AO40, but I would like to simply double check the location of my beam for eme. If anyone has mounted a camera on a beam, I would be interested in what you used. Yes, I know all about beam width vs the moon. I just hate to call CQ with my beams pointed to the ground due to some Murphy type of failure.
73, -james W5AOO _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
At 10:22 AM 9/8/2012, James Luhn wrote:
Please don't ya'll laugh too hard at me. Has anyone ever mounted a camera on a beam? Now I am not trying to see AO40, but I would like to simply double check the location of my beam for eme.
I saw (many years ago), pictures of video cameras mounted on the edge of an eme dish for just this purpose. I also remember (from some amsat meeting) a picture of someome's shack which had a TV monitor with the moon in the center of it.
Only concern i'd have is that a TV camera is an electronic device, which generates EMI. Mounting such a thing so close to your antennas may cause some or possibly a huge amount of interference. I'd suggest making sure you can cut power to the camera remotely, and also can disconnect the cable that carries the TV signal down to the shack. Whether that cable is a coax or an ethernet or whatever, it can carry EMI from equipment in the shack up to the antenna.
Hi James, W5AOO
To mount a camera on a beam in order to locate the moon to work EME is a very bad procedure.
The correct procedure is to point the antenna system toward the Sun and get the maximum Sun Noise on receiver.
As soon the maximum Sun Noise is received please calibrate the Azimuth and the Elevation of your control box relative to the Sun position.
If the control box is well calibrated with the position of the Sun than it will be very well calibrated also for the Moon position.
I use the above procedure for my antenna system and I am very happy with it.
73" de
i8CVS Domenico
----- Original Message ----- From: "James Luhn" luhn@wt.net To: amsat-bb@amsat.org Sent: Saturday, September 08, 2012 7:22 PM Subject: [amsat-bb] Camera on an antenna
Please don't ya'll laugh too hard at me. Has anyone ever mounted a camera on a beam? Now I am not trying to see AO40, but I would like to simply double check the location of my beam for eme. If anyone has mounted a camera on a beam, I would be interested in what you used. Yes, I know all about beam width vs the moon. I just hate to call CQ with my beams pointed to the ground due to some Murphy type of failure.
73, -james W5AOO
I'd say that differently...
Nothing wrong with using the camera. But your point is well taken to calibrate the camera to the BEAM by first pointing at the sun. Then (if your camera survives) the camera is a perfectly good aiming device for the moon and it eliminates any errors in the Antenna controller and pots. Bob
-----Original Message-----
To mount a camera on a beam in order to locate the moon to work EME is a very bad procedure.
The correct procedure is to point the antenna system toward the Sun and get the maximum Sun Noise on receiver.
As soon the maximum Sun Noise is received please calibrate the Azimuth and the Elevation of your control box relative to the Sun position.
----- Original Message ----- From: "James Luhn" luhn@wt.net To: amsat-bb@amsat.org Sent: Saturday, September 08, 2012 7:22 PM Subject: [amsat-bb] Camera on an antenna
Please don't ya'll laugh too hard at me. Has anyone ever mounted a camera on a beam? Now I am not trying to see AO40, but I would like to simply double check the location of my beam for eme. If anyone has mounted a camera on a beam, I would be interested in what you used. Yes, I know all about beam width vs the moon. I just hate to call CQ with my beams pointed to the ground due to some Murphy type of failure.
73, -james W5AOO
_______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Hi Bob,
Using a calibrated camera on the Sun is a good system to point the antenna on the Moon only when there are no clods and when the sky is clear.
On the other side a well calibrated control box on the Sun Noise is a goood system to point the antenna at the Moon with any wheader condition even with clods and this make the difference.
73" de
i8CVS Domenico
----- Original Message ----- From: "Robert Bruninga" bruninga@usna.edu To: "i8cvs" domenico.i8cvs@tin.it; "James Luhn" luhn@wt.net; "Amsat - BBs" amsat-bb@amsat.org Sent: Tuesday, September 11, 2012 12:20 AM Subject: RE: [amsat-bb] Re: Camera on an antenna
I'd say that differently...
Nothing wrong with using the camera. But your point is well taken to calibrate the camera to the BEAM by first pointing at the sun. Then (if your camera survives) the camera is a perfectly good aiming device for the moon and it eliminates any errors in the Antenna controller and pots. Bob
-----Original Message-----
To mount a camera on a beam in order to locate the moon to work EME is a very bad procedure.
The correct procedure is to point the antenna system toward the Sun and get the maximum Sun Noise on receiver.
As soon the maximum Sun Noise is received please calibrate the Azimuth and the Elevation of your control box relative to the Sun position.
----- Original Message ----- From: "James Luhn" luhn@wt.net To: amsat-bb@amsat.org Sent: Saturday, September 08, 2012 7:22 PM Subject: [amsat-bb] Camera on an antenna
Please don't ya'll laugh too hard at me. Has anyone ever mounted a camera on a beam? Now I am not trying to see AO40, but I would like to simply double check the location of my beam for eme. If anyone has mounted a camera on a beam, I would be interested in what you used. Yes, I know all about beam width vs the moon. I just hate to call CQ with my beams pointed to the ground due to some Murphy type of failure.
73, -james W5AOO
Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
participants (7)
-
Bob- W7LRD -
Franklin Antonio -
g0mrf＠aol.com -
i8cvs -
James Luhn -
Jim Jerzycke -
Robert Bruninga