LNB & Feedhorn

Terryl

Specialist Contributor
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My Satellite Setup
OpenBox X5 on a 1 meter motorized dish.
And now a 10 foot "C" band dish.

Custom built PC
My Location
Deep in the Boonies in the central Sierra Nevada mountains of California.
#21
hey peeps, so the dish ive always had just has the normal LNB attached to it,
how do i use the LNBs ive got and how do i attach it to the feedhorn?

or do i need to buy a lnb specially for the feedhorn

i hope my question makes sense as im a newbie when it comes to feedhorn lnbs
What type of dish are you trying to add these LNB's to? A Ku band dish? Or a "C" band dish?
 
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My Satellite Setup
Dreambox 800HD SE, Dreambox 500S, Skybox F5S, 90cm Solid Dish, Tm2600 Motor, Inverto Black Ultra LNB! :)
My Location
Lost...
#22
What type of dish are you trying to add these LNB's to? A Ku band dish? Or a "C" band dish?
ku band fibo gregorian
 
Messages
763
Likes
250
My Satellite Setup
Dreambox 800HD SE, Dreambox 500S, Skybox F5S, 90cm Solid Dish, Tm2600 Motor, Inverto Black Ultra LNB! :)
My Location
Lost...
#23
dont mean to sound thick but how do i disconnect the feedhorn and the existing LNB?

i think theres alloy key nut at the bottom which i think i need to undo to take it off
 

nelson_b

Contributor
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1,439
My Satellite Setup
Strong 4375 driving 1.8 C.M. offset + Inverto Black Ultra twin + BSC 421 and Zinwell C band l.n.b.,s - DR HD F15 - TM5302 and Skybox/Openbox M3 - HD receivers.+ other dishes in use - 2.4 CM offset - Alcoa 1.8 P.F. - C.M. 120.
My Location
north west yorkshire
#24
Hi -
Yes there is a hex allen screw at the bottom of the small hole on the side of the feedhorn ... its likely to be
seized / tight ... soak with wd40 or similar ... take care not to cause damage to hex screw or feedhorn
 
Messages
763
Likes
250
My Satellite Setup
Dreambox 800HD SE, Dreambox 500S, Skybox F5S, 90cm Solid Dish, Tm2600 Motor, Inverto Black Ultra LNB! :)
My Location
Lost...
#25
Hi -
Yes there is a hex allen screw at the bottom of the small hole on the side of the feedhorn ... its likely to be
seized / tight ... soak with wd40 or similar ... take care not to cause damage to hex screw or feedhorn
alright kewl, i'll get some wd40 thanks mate :)
 

nelson_b

Contributor
Messages
1,570
Likes
1,439
My Satellite Setup
Strong 4375 driving 1.8 C.M. offset + Inverto Black Ultra twin + BSC 421 and Zinwell C band l.n.b.,s - DR HD F15 - TM5302 and Skybox/Openbox M3 - HD receivers.+ other dishes in use - 2.4 CM offset - Alcoa 1.8 P.F. - C.M. 120.
My Location
north west yorkshire
#26
alright kewl, i'll get some wd40 thanks mate :)
O.K .... yes dont rush it .. that feedhorn metal is quite soft and a bit thin near the screw .... they do get seized in the casting..... the hex key i use is 2.5mm (it may take one a fraction bigger) you may be lucky, if someone greased the screw last time it was out ... a couple of pics from my fibo 90 that may help. if it proves to be troublesome it may be easier to unbolt the 4 bolts holding the l.n.b. to the flange, and just bolt on a bought C120 . or a modified black ultra l.n.b.f.

DSC07934-Optimized.JPG DSC07935-Optimized.JPG
 
Messages
763
Likes
250
My Satellite Setup
Dreambox 800HD SE, Dreambox 500S, Skybox F5S, 90cm Solid Dish, Tm2600 Motor, Inverto Black Ultra LNB! :)
My Location
Lost...
#27
O.K .... yes dont rush it .. that feedhorn metal is quite soft and a bit thin near the screw .... they do get seized in the casting..... the hex key i use is 2.5mm (it may take one a fraction bigger) you may be lucky, if someone greased the screw last time it was out ... a couple of pics from my fibo 90 that may help. if it proves to be troublesome it may be easier to unbolt the 4 bolts holding the l.n.b. to the flange, and just bolt on a bought C120 . or a modified black ultra l.n.b.f.

View attachment 115786 View attachment 115787
yea i'll be careful when unscrewing it, thanks for the pics
 

Trust1

Specialist Contributor
Messages
807
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1,327
My Satellite Setup
1.8 m CM at SMR 1224 + Elev. with 7 lnb changer Ku (lin - circ) - Ka (lin - circ) C (lin - circ)
My Location
Nijmegen Netherlands
#30
Cut of the horn with my lathe , machine the OD of the waveguide at 25 mm .
That fits exactly in the Fibo horn .
Lnb in the picture is KOSCOM but almost any type can be modded .
 

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