Register

Welcome to the RDI-Board Community.

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed.


Donate Now Goal amount for this month: 100 EUR, Received: 100 EUR (100%)
Donate to support this site...

Results 1 to 11 of 11
  1. #1
    Junior Member Teacher
    Join Date
    Mar 2005
    Location
    Bucuresti
    Posts
    198
    Posts Thanks / Likes

    Unhappy Cine Are aceasta antena (1.4;prime focus) PLZ HEEELP

    Am primit "cadou" o antena abandonata de un vecin arab:
    Date:
    >Material: Aluminiu
    >Diametru 1.4m
    >>(mai multe detalii in imagini)

    Problema:
    Antena a fos parasta fara tijele de sustinere suport LNB si suportul pentru LNB)

    Cerinte:
    Am un prieten care poate produce respectivele ansambe.
    Dar din masuratorile nu pot avea o fidelitate foarte mare ca atare abaterea de calcul poatefi ff mare, deci si posibilele pierderi la fel de mare daca nu nimeresc corect zona focala.




    PLZ HELP

    Ajutor, daca cineva poate recunoaste antena/ e posesor de asa ceva, si poate oferi schite, masuratori, fotografii ale elementelor in caz, deci PLZ PLZ HELP.


    Caracteristici[ALL]:
    Diametru Util( fara suprafata ambutisata lateral):137cm

    Distanta intre punctele fixare tije sustinere LNB(3puncte):120cm fiecare segment.

    Distanta intre punctele fixare montura ~57.5cm


    detaliu prindere tija


    suprafata ambutisata lateral


    adancime calota glaciara:


    montura
    interior 6.5 cm


    lungime 20cm




    geometric problema este :



    unde in cazul actual avem
    BB'=120
    BO=137/2
    OC~18

    si rezulta AB=CO+ BO^2/2CO adica AB=148.34 CM
    dar asta e teoretic
    practic masuratorile nu sunt clare pentru adancimea OC
    nu am luat in calcul ofsetarea tijelor fata de cerc datorita existentei cercului de prindere LNB ( sa zicem ca se compenseaza)



    PLZ HELP
    With love,
    Arcan

  2. #2
    Junior Member Teacher
    Join Date
    Mar 2005
    Location
    Bucuresti
    Posts
    198
    Posts Thanks / Likes

    Default

    alte img montura

    l=53cm


    l=32cm
    With love,
    Arcan

  3. #3
    Multi Banned User Expert
    Join Date
    Oct 2003
    Posts
    11,134
    Posts Thanks / Likes

    Default

    rezolvarea problemei aici :http://www.satlex.ro/ro/fdratio.html

  4. #4
    Junior Member Teacher
    Join Date
    Mar 2005
    Location
    Bucuresti
    Posts
    198
    Posts Thanks / Likes

    Default

    Quote Originally Posted by nirolf View Post
    rezolvarea problemei aici :http://www.satlex.ro/ro/fdratio.html
    cool dar m-assimti mai bine sa aflu exact dimensiunile de la preoducator

    10x
    With love,
    Arcan

  5. #5
    Junior Member Teacher
    RDI - Board Default Avatar

    Join Date
    Feb 2007
    Posts
    204
    Posts Thanks / Likes

    Default

    Am si eu exact acelasi tip de antena.Am sa masor cat are bratul la mine.

  6. #6
    Junior Member Teacher
    Join Date
    Mar 2005
    Location
    Bucuresti
    Posts
    198
    Posts Thanks / Likes

    Default

    Quote Originally Posted by mokanu View Post
    Am si eu exact acelasi tip de antena.Am sa masor cat are bratul la mine.
    te rog

    si daca poti si o poza cu suportul de feeder
    With love,
    Arcan

  7. #7
    Junior Member Teacher
    Join Date
    Mar 2005
    Location
    Bucuresti
    Posts
    198
    Posts Thanks / Likes

    Default

    Quote Originally Posted by nirolf View Post
    rezolvarea problemei aici :http://www.satlex.ro/ro/fdratio.html
    calculul meu se pare ca era totalmente gresit
    am considerat antena o calota polara a unei sfere si zona focala centrul sferei, si nu e



    astept masuratorile lui mokanu


    With love,
    Arcan

  8. #8
    Junior Member Teacher
    RDI - Board Default Avatar

    Join Date
    Feb 2007
    Posts
    204
    Posts Thanks / Likes

    Default

    Am masurat bratul si la mine are 88cm iar suprafata unde se infileteaza de 3cm.Eu am 3 brate.iar lnb-ul este prins intr-un disc "gaurit" in mijloc.

  9. #9
    Junior Member Teacher
    Join Date
    Mar 2005
    Location
    Bucuresti
    Posts
    198
    Posts Thanks / Likes

    Default

    Quote Originally Posted by mokanu View Post
    Am masurat bratul si la mine are 88cm iar suprafata unde se infileteaza de 3cm.Eu am 3 brate.iar lnb-ul este prins intr-un disc "gaurit" in mijloc.
    10x
    merci mult

    deci bratul este de 88cm partea utila(adica de deasupra urechi metalice de pe antena pana la intrarea in disc" , sa inteleg ca se prinde de antena cu 2 piulite ( pt fiecare tija ) pe urechiea metalica, iar in disc are filet si se infileteaza direct, discul mai are pe el un filet sau 3 filete cu surub(uri) pentru prins feederul ?

    cam ce diametru ae discul aproximativ?
    With love,
    Arcan

  10. #10
    Multi Banned User Expert
    Join Date
    Oct 2003
    Posts
    11,134
    Posts Thanks / Likes

    Default

    de ce te complici ? faci tijele mai lungi pui piulite si dedesubt si deasupra "discului" si reglezi pina obtii semnal maxim.simplu !
    vezi ca "disc" se gaseste de cumparat in unele magazine.

  11. #11
    Junior Member Teacher
    Join Date
    Mar 2005
    Location
    Bucuresti
    Posts
    198
    Posts Thanks / Likes

    Default

    Quote Originally Posted by nirolf View Post
    de ce te complici ? faci tijele mai lungi pui piulite si dedesubt si deasupra "discului" si reglezi pina obtii semnal maxim.simplu !
    vezi ca "disc" se gaseste de cumparat in unele magazine.
    10x o sa caut
    merci
    With love,
    Arcan

 

 

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Back to Top