Ku LNB orientation

[esteveW]

I have my solid 3 meter BUD set up and all seems to be working well on the C band. I'm finding almost all the satellites on the list(s). However, I haven't been able to get a single channel on Ku band.

I have a Corotor II Plus with an Eagle 770Ku, digital grade LNB. I have been suspecting that the LNB might be defective so I just took it off to verify the spec. etc.. Noise 0.6 dB, Input freq. 11.7 - 12.2 GHz, Output freq, 950 - 1450 MHz.

However, . It has a square base but I now notice rest of the housing isn't semetrical. It kinda tapers off more on one side. This may not mean anything but when I look down the feed opening I see that there is a small brass button on one side. I assume this is where the signal is picked up (for lack of a better descriptive term). I could try it in the other 3 positions, but it isn't easy to install and remove on the top rung of my ladder. (easier to ask those who know.)

Before I order a replacement, I need to know and check out, which way this LNB should be oriented on the feed horn elbow. I'm pretty sure I remember how it was positioned when I took it off.

Does it really make any difference.

If I should replace it, what make/model should I use. I want to continue to use this Corotor II Plus since it is the only C / Ku feed horn that will fit my Button Hook without modification.

Any comment or suggestion will be appreciated.

Steve

 

[esteveW]

I just reinstalled the Ku LNB on the feed horn elbow and found that the mount bolt holes are not equally spaced and the best I could do was rotate it 180 deg. . I'll try test it this evening and see if that makes any difference.

I doubt it but it doesn't cost $45 to experiment.

Steve

 

[gmc75]

If you're using an analog receiver there's not much up there on KU. But if you're using a FTA digital receiver there's a ton of channels on KU.

 

[trinity13]

Steve,

Just looked at my spare Co-rotor II, and yes, the Ku LNB only fits one way (well, two if you rotate it 180 degrees, lol).
Is this a solid metal dish?
If so, you should be able to pick some Ku channels.
I have an old 12' aluminum mesh dish (that was damaged enough to be replaced by
my neighbor's insurance company) that will pull in Ku channels with the Co-rotor that
is on it. I did have to replace both of my LNB's to get it working (they were taken out
by a near lightning strike).
If your dish is fiberglass, it should work, but depends on the mesh inside the fiberglass.
Good luck!

 

[esteveW]

Thanks for the encouragement Trinity,

My dish is solid aluminum and if all else fails (this economy), I can sell if for scrap and make a house payment. really heavy gauge.

It is in near perfect condition. Surprisingly, since it was only 20 ft off a rural road.

I'm going to order a replacement DMS Int. model ASC511 for $29 and change.

I'm optimistic.

Steve

 

[truckracer]

My 10' mesh sami gets better signal on ku with the corotor and a norsat ku lnb than my 90cm solid with an invacom lnbf.

A big dish that is not warped and properly tuned will be super on KU especially a solid aluminum dish.