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Callisto

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Reply with quote  #1 
I've seen several dishes in this part of the country over the years with 2 or more feedhorns mounted on their BUD. I now use a Corotor which does have a small degree of signal loss. I would like to mount a 2nd dedicated C band feedhorn or LNBF. I have lots of C band feeds and LNBF's on hand. Has anyone ever done this successfully? I mainly watch channels around the centre of the arc from G3c to SES3, network feeds and the such.
RimaNTSS

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Reply with quote  #2 
@Callisto In this part of the world people usually install Ku-band LNB in the middle of the dish )in focal point) and then they install C-band LNB in multifeed. it is much easier to do on BUD with 3 feedarms. If your antenna has 4 feedarms than it could also be possible but so easy (I think) Something like this: IMG_20191005_234239 (Large).jpg IMG_20191005_223951 (Large).jpg IMG_20191005_223841 (Large).jpg 


boblop

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Some thing to keep in mind is "in some other countries" they operate their autos on the other side of the road. That might not workout so well here if you are one of the few doing this driving.

So I ask the question "just how many focus points" does a given sat dish have? What happens at that one best focus location? Another question is this dish a fixed position or can it be motored over into other positions or angles looking at the sat parking arc overhead?

Now because there are many different positions above us which contain parked sats sending down signals you can get "some signal" from off focus positions on a fixed sat dish. Again this "is different" in other parts of the world because people there are looking up at different parked sats. If you are in London and ask how to get to 6th Ave you get a different answer than if you are in New York and ask the same question.

So for a fixed position dish there are other lesser "refelection" points from "other offset" sat positions above us which "may be" strong enough and clean enough" that your sat receive may be able to receive and decode. Even the  commercial users do some times have more than one feed on a given dish.

Bear in mind here the requirements of a sat receiver are to get a clean enough and strong enough signal so it can lock on and decode the data contained in that signal. If your lnb or lnbf is picking up several different sats above all at the same time most likely your receiver has no clue how to sort it out.  

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CWDM

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Reply with quote  #4 
simulsat 1.jpg 
Perhaps if you want to achieve multiple satellites change your dish to one that can accommodate it.


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John 3:16  1.2-meter motorized,1.8-meter 103w, Ocatgon SX88.AZ Prem.
majortom

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Reply with quote  #5 
I would concentrate on getting the dish aligned correctly (your pull dish thread), rather than futzing with such an arrangement. 
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Hockeynut

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Reply with quote  #6 
Can be done with fairly good results Callistilo. Have a 10 foot KTI parked on SES 1 and a sidecar looking at SES 11 for the radio feeds. 4 deg spacing seems to work ok in this situation.Only if it is 24/7 stuff and not some tough feeds.

Good luck.

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Dish`s--10' KTI,10' Button Hook,10' Unimesh x2.
1.2 Ch Masters parked at 91,103.
1.2 Ch Master with factory polar mount tracking from-58w-127w -Western Ku Dish.
1.2 Ch Master with factory polar mount tracking from-12.5w-81w -Eastern Ku Dish.
1.8 Prodelin with custom built polar mount in the works. Currently parked at 103.
Positioners--Gbox,Vbox`s.
Receivers--AZMe,AZPlus,AZElite,Icecrypt S1600 HD,VU Solo2 SE,Octagon SF4008 UHD 4K,TBS 5520se,5927,6902,6903,6982.
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Callisto

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Reply with quote  #7 
Quote:
Originally Posted by Hockeynut
Can be done with fairly good results Callistilo. Have a 10 foot KTI parked on SES 1 and a sidecar looking at SES 11 for the radio feeds. 4 deg spacing seems to work ok in this situation.Only if it is 24/7 stuff and not some tough feeds.

Good luck.
that is really good news HockeyNut. I mostly want to try to concentrate on using it for 99w to 105w mostly on network kind of signals. Could you possibly post a photo with the sidecar on the dish?
Hockeynut

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Reply with quote  #8 
Here ya go Callisto.4 deg spacing.It works fairly good..The sidecar is for radio feeds on SES 11 Which are DVBS signals so this is forgiving. Good luck.

IMG_0501.jpg 


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Dish`s--10' KTI,10' Button Hook,10' Unimesh x2.
1.2 Ch Masters parked at 91,103.
1.2 Ch Master with factory polar mount tracking from-58w-127w -Western Ku Dish.
1.2 Ch Master with factory polar mount tracking from-12.5w-81w -Eastern Ku Dish.
1.8 Prodelin with custom built polar mount in the works. Currently parked at 103.
Positioners--Gbox,Vbox`s.
Receivers--AZMe,AZPlus,AZElite,Icecrypt S1600 HD,VU Solo2 SE,Octagon SF4008 UHD 4K,TBS 5520se,5927,6902,6903,6982.
Graphics Cards--Nvidia GT 1030,Nvidia GTX 960,Nvidia GTX 1060
GOD BLESS AMERICA.
boblop

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Reply with quote  #9 
A quick internet search tells us you "can do any thing you want" with a sat dish and an lnbf.

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Callisto

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Reply with quote  #10 
Quote:
Originally Posted by Hockeynut
Here ya go Callisto.4 deg spacing.It works fairly good..The sidecar is for radio feeds on SES 11 Which are DVBS signals so this is forgiving. Good luck.

IMG_0501.jpg 

thank you very much for posting this HockeyNut (& for the photos & advice from boblop and rimaNTSS). I've been in this hobby since the 70's & just found out lately that multiple feeds are possible on a single dish. I did try a Dishnet LNBF on my BUD about a decade ago and had a powerhouse signal on 61.5, 110, 119 &'129 & never experienced rain fade. Now I mainly want to add a C band only feedhorn to my dish as I feel that I am experiencing a moderate degree of signal loss with the Corotor. I truly appreciate all of the advice and photos in this thread. I feel it will be very helpful to other new members that want to get into a project like this.
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Fellow Members, your posts are welcome here! Do not worry about posting everything perfect. Different receivers and LNB's will give you different Frequencies and Symbol Rates. Some set top boxes, PCI cards and USB receivers, Do Not Require all of the same information that others may need. It is not Required to post everything that others may need to tune in a feed. It is just most important to share the find. We can always adjust the Frequency and Symbol Rates and try the various Modulations and FEC's on our own receivers until we get a lock and then give a polite reply with what works for your receiver, as that information might help others as well. We all appreciate the efforts and energy of the Posters!

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