ralphmagno said:hello,
we are going around and around and going no where fast.
What satellite are you trying to receive????
How can anyone answer the question?
Ralph
Analoguesat said:You are going at this the wrong way round. You need to decide WHICH C-band channels you want to watch of some particular satellite, then design your receive station around that info.
At the moment no-one can really help you as you are basically asking us to guess what you want.
ralphmagno said:hello,
if your using cetimeters use the following fomula.
focal point = diamater squared devided x 16 depth.
to measure the depth run a string from edge to edge and measure in the center to the dish.
example if the dish is 320 cm in diam and 30 cm depth we would have 102,400 cm devided by 16 x 30cm or 480
the answer is 213 cm from the center to where the lnb needs to be placed.
you can not make scaler rings by welding them.
if you are going to use the c-band lnb in the picture it has scaler rings built in.
thise rings in the center of the feed horn.
if you are going to use the ku band lnb you will have to buy a feed horn for prime focus with a c120 flange and then find a low noise lnb with a c 120 flange as well.
ralph
ralphmagno said:hello,
what is the depth????
if the depth is 40 cm then its wrong.
you have to mesure the depth.
on one can guess by looking at a picture.
you have to run a string tight across the dish and measure from the centure to the dish centure.
without that measurment we can not know.
ralph
ralphmagno said:hello,
you should have some one who understands english better.
First of all it is not a tripod its feed horn support.
Second first you say its 3.2 meters and then you say 3 meters?
Third without measuring the depth no can figure the focal point.
You must do this.
Measure the diameter in cm. Is the dish 300 cm or 320 cm?
Then pull a string across the center of the dish and from the center measure the depth.
Without those 2 numbers no one can figure out where the focal point is.
With the diameter and depth we can figure the focal point
ralph
ralphmagno said:hello,
ok thanks for the information. then from the information provided then
the focal point of your feed horn should be 123 cm.
this is measured from the center of the dish stright out.
also that all 3 support arms will be longer being that the run from the side.
so from the center of the dish where the dark area was in the picture straight out it will be 123 cm center of the dish.
this is a prime focus and not a offset dish.
ralph