prime focus dish and feedhorn information

There are 6 replies in this Thread which was already clicked 662 times. The last Post () by TK4|2|1.

    Hi can any one give me some advise please.
    i have a caravan with 0 tv reception the van is in a wooded valley also no 3g signal so no streaming.(This is in plymouth uk)
    with 100ft trees and hillside =125ft to the southern *** , i would like to use a prime focus dish and feedhorn reason i am 85 ft back from the trees and hillside,
    Would i get a better chance of picking up the *** signal at28.5 degrees with with the direct signal into the feedhorn with the dishes greater angle as apposed to the flatter fitting offset dish??
    Thank you great site jack

    You would think so !


    I think The elevation angle of the beam is about 21 degrees ¬ Quiet Low on the uk Horizon !
    Can you borrow a prime focus before commiting to buy one ?


    You could experiment 1st if you have a meter ?

    78cm dish on tm2300 metal gear motor + 1m Orb with tm2300 + 1.8m Channel Master on H-H floor mount + 80cm ISS with TM2300 AND Inverto Black LNB,inverto Unicable QUDL 42 LNB,- Global invacom Dscc LNB,- Triax KA LNB, - Yuri LNBF C Band YLF-CDP16C

    Quote from rikjaard-real

    You would think so !


    I think The elevation angle of the beam is about 21 degrees ¬ Quiet Low on the uk Horizon !
    Can you borrow a prime focus before commiting to buy one ?


    You could experiment 1st if you have a meter ?


    No excess to a dish but will borrow a meter thanks for the reply a advise .
    Regards Jack

    • Official Post

    The signal comes down at the same angle from the satellite. 24.7 degrees for Plymouth. The reflected signal to LNB is different. It won't make a difference which dish you use.



    You will have to use trigonometry to estimate if you can receive signal or use app on phone.
    Tan X = opp/adj


    At 85 feet away, the maximum height of any obstructions is 39 feet

    Well not everyone has a prime focus dish in their back pocket for testing but as said a normal dish and meter is what you need to establish if you actually have a clear line of sight and a 3 meter prime focus will be of no value if you are slap bang into a mountain or forest.


    I have even found myself installing dishes on trees to gain more height but i would not try that one at home for safety reasons or in caravan parks etc...the installs i done when i found myself in a similar situation was on private land so i had permission.


    MK

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