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<blockquote data-quote="jackpeas" data-source="post: 5288">HI, feedhorn issuse 1 Its hart to measure the scalar ring to the dish rim lip(the outter edge trun down) I can not tell if the scalar ring is center are not. I can take the feed out. 2 When I tape measure from the dish to the feed its 36''. On the side of the feed line for 30,32, 34,36,38,40,42 (42 line is what Iam useing) because I would never get 36''.And that why I called the maker of the dish DH Satellite.I was asking about f/d for the feed . He told me to set it at 35 5/8(from the center to the face of the feed.He did not care about the number on the side.My Question is where is the scalar ring support collar should be(how far from the center of the dish out?On the 4 legs that hold the collar for the scalar ring (2 set of hole for adjusting the in and out) That why I had it at 35 5/8 then I move it to 36'' and the picture got better. Now let start over and get this thing righ. I will take your advice on how to do this.How do I measure from the scalar ring out to the edge? To make sure the feed is center. I dont want to eyeball it, that not good. Maybe I can use a yard stick and a clamp. That is the best I can come up with. You got any Ideal? Next when I put 2x4 across the face of the dish to check the depth.22 1/2'' ok. This is from the manual for the dish.(If the feedhorn you have selected has an adjustable scalar ring. Move it to the proper wave guide setting as per the manuacturer's Instructions. Below we have listed the focal lenghts and focal length/diameter ritios for our commercial antenna and you will have the information to set the scaler properly.&nbsp;&nbsp; 10' (3m)&nbsp; 36''f/1&nbsp; .3f/d *&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 11' (3.3m) 36''f/1&nbsp; .27f/d&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 12' (3.6m) 36''f/1&nbsp;&nbsp; .25f/d&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; Under fine tuning&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; Set the feed at the exact focal lenght we recommend. It will either be 36''or 57.6''(This does not take into effect the allowance for the feed&nbsp; manufacturers recommendation that the focal length be 1/4'' inside the waveguide for C-band and1/8''for Ku.&nbsp; Than you jackp n Chicago</blockquote>

[QUOTE="jackpeas, post: 5288"] HI, feedhorn issuse 1 Its hart to measure the scalar ring to the dish rim lip(the outter edge trun down) I can not tell if the scalar ring is center are not. I can take the feed out. 2 When I tape measure from the dish to the feed its 36''. On the side of the feed line for 30,32, 34,36,38,40,42 (42 line is what Iam useing) because I would never get 36''.And that why I called the maker of the dish DH Satellite.I was asking about f/d for the feed . He told me to set it at 35 5/8(from the center to the face of the feed.He did not care about the number on the side.My Question is where is the scalar ring support collar should be(how far from the center of the dish out?On the 4 legs that hold the collar for the scalar ring (2 set of hole for adjusting the in and out) That why I had it at 35 5/8 then I move it to 36'' and the picture got better. Now let start over and get this thing righ. I will take your advice on how to do this.How do I measure from the scalar ring out to the edge? To make sure the feed is center. I dont want to eyeball it, that not good. Maybe I can use a yard stick and a clamp. That is the best I can come up with. You got any Ideal? Next when I put 2x4 across the face of the dish to check the depth.22 1/2'' ok. This is from the manual for the dish.(If the feedhorn you have selected has an adjustable scalar ring. Move it to the proper wave guide setting as per the manuacturer's Instructions. Below we have listed the focal lenghts and focal length/diameter ritios for our commercial antenna and you will have the information to set the scaler properly. 10' (3m) 36''f/1 .3f/d * 11' (3.3m) 36''f/1 .27f/d 12' (3.6m) 36''f/1 .25f/d Under fine tuning Set the feed at the exact focal lenght we recommend. It will either be 36''or 57.6''(This does not take into effect the allowance for the feed manufacturers recommendation that the focal length be 1/4'' inside the waveguide for C-band and1/8''for Ku. Than you jackp n Chicago [/QUOTE]

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