Recent content by elgizmops

  1. E

    Prime Focus Lnb Focal Length

    Yes, I will change all the nuts and bolts to stainless. The instructions state a focal length of 50 1/8 inches. My question was where is this measured from, Channel Hopper suggested 1 cm inside the lnb. I take it that this means 1 cm from the face where the feedhorn attaches. he also mentioned...
  2. E

    Prime Focus Lnb Focal Length

    I didnt use a 3 leg setup because the manufacturers instructions showed 4 legs. Unfortunately with parts missing I had to try and work out what I needed. It does mean that there is limited lateral lnb adjustment, probably use plastic washers or have to make something else.
  3. E

    Prime Focus Lnb Focal Length

    Hello, its a 3.6 metre dish. About 20 years old but never assembled. When I got it there was no packing list and until i followed the instructions through I didnt realise what was missing. I aslo didnt understand some of the terminology so relied on the diagrams in the instructions.. Yes the...
  4. E

    Prime Focus Lnb Focal Length

    Hello, Attached are photos which I hope will help clarify what I am trying to do. The piece of wood across the top two legs is only for bracing purposes while I try to adjust the focal length, the lower 2 legs are diconnected to estimate how much need cutting off to achieve the 50 1/8 inch...
  5. E

    Prime Focus Lnb Focal Length

    what is boresight accuracy, sorry I am a complete novice
  6. E

    Prime Focus Lnb Focal Length

    Thanks for answering. I am using the dish for TV reception
  7. E

    Prime Focus Lnb Focal Length

    Hallo I need some advice please. My Obitron SX12 manual says that the focal lenght is 50 1/8 inches. Is this measured from the face of the lnb where it bolts to the feedhorn. I have made of my support legs, which are oversize, and need to cut off the excess
  8. E

    Orbitron SX12

    Hi all. I have orderes an Invacom feedhorn with C120 flange and scalar rings. Hopefully this is what is needed, I will have to make up the mountings boss for the 4 legs probably out of 4-5mm aluminium plate when the parts arrive .
  9. E

    Orbitron SX12

    Hi, I have just collected the 4 legs I am going to use. At present they are 1.9m long 15mm stainless steel. Will check the internet for the KU feed. Thanks
  10. E

    Orbitron SX12

    Hi, Thanks for the two responses. The photos show the same Orbitron that I have, good idea with the brackets to connect the lnb legs. i was going to pierce the mesh but will copy your solution. Apart from the C120 what else will I need to source to mount my Invacom lnb. Couls you recommend a...
  11. E

    Orbitron SX12

    Hello all. New to this so would like help and patience . I have just found a new 20 year old but unused Orbitron SX12 3.6m dish. I have assembled it but the 4 legs for mounting the Lnb were missing, 4 x 1.9m 15mm stainless tube on order from local metal firm. This is a prime focus dish, should...
Top