Does A DMX741 Benifit From The 1/2 Inch Spacer Idea?

[yankee495]

I have read all over about the spacer on the BSC Lnbf but have not found a clear answer for the DMX741.

I have tweaked and tuned and it just seems the Ku could do a little better. I'm not getting any of the PBS on AMC 21 125W with a 6' dish. From what I read they are still there.

 

[Lak7]

Best to peak the DMX741 on your South Sat., make sure the LNBF is centered, parallel to the face of the Dish, and using the proper f/d setting: Experiment with adjusting the Focal Distance and small moves of f/d setting.
Then tweak the Mount to the Arc.

 

[yankee495]

Peak it on C or Ku band? The next three days are nice, 50-60 even. So I plan to tweak it some more, especially the focal distance. I think the dish is pretty close, as adjusting it (elevation) now I can't gain a single point on say a Q jumping like 70,71,70,71 etc. Can't get it to stay on 71 by adjusting the dish. The dish was tuned to a corotor to the best of my ability then I swapped in the 741 (into the corotor scaler ring) and done my best on FD.

I peaked it on C band (I think), by phone to the old lady who was impatient at best!

Does the spacer help the 741 Ku?

From what I read I'm doing pretty good now for a by phone "tune up" and I have a couple feeds we ain't supposed to talk about to compare.

 

[Lak7]

I know nothing about the 1/2" spacer.

On your True South Sat, Peak C, then Peak for Ku. Very small changes in Elevation goes along way in Ku, and never notice in C Band. I count the Adjustment Bolt "faces" (1/6 th of a turn).
Then drive the Dish to the East and West to check Quality, and adjust from there.
I would not expect to be able to tune the in 1 long day.

Ku on my 10 foot is just a little better than my 80cm Ku - I have a 90cm "Bob Jones" for those must have weak feeds.