having issues with Mutliple lnb on c band

[oceansatellite]

Spent a lot of time today trying to get some multiple lnbs on a sold 8 footer. I get a rocking signal on anything i center it on, had 87% quality on the wyoming NBC channel on 99w, but as soon as i try to go for an offset additional lnb, quality drops dramatically. I'm taking a 5 degree difference from dead center. Any suggestions, or is stacking any multiple lnbs on a c a limitation.

When i was centered on 99w, the best i could do was pick up a few hot transponders on 91w.

 

[hwm]

My experience with offset LNBs on ten foot Winegard.

I am currently using three LNBs on my ten foot Winegard mesh dish. The center one is set to 99w, and the offset ones are for 91w and 103w. I can get every transponder listed on the center LNB, but generally cannot get some weaker ones on the offset LNBs.

A couple of suggestions: fine tune your skew settings on the offset LNBs, and try angling them in towards, and even past the dish center just a little bit. Tiny adjustments in the LNB position make a big difference in signal Q . You gotta work hard to find the sweet spot. A receiver with a signal beeper set up with a small TV right by the dish helps a lot. Peak your signal on the weakest transponder once you find the satellite you want.

I think the bottom line is that some weaker transponders are not going to be strong enough to receive with an offset from center LNB on an 8-foot dish, or even a ten footer.

Facing my dish the LNBs are left to right: 91w, 99w, 103w.

 

[Cham]

I can get 91, 99, qnd 107 quite well on one 8' dish. This dish has a long focal depth though which makes a difference. The longer the focal depth the better it will work with multiple feed horns.

 

[gabshere]

this is why i inquired in another thread . if you can find extra scalers , maybe modifing them / cutting them to be placed closer to center will allow or cut down on signal loss. I know others have posted pictures of those scalers , Iceberg is one that comes to mind here at the forum. I just don't know how much you gain from adapting two or three scalers together. Seen commercial ads where in asia or even australia you can purchace multiple lnb scalers . it would be nice to fine and test one of those.

 

[oceansatellite]

I am currently using three LNBs on my ten foot Winegard mesh dish. The center one is set to 99w, and the offset ones are for 91w and 103w. I can get every transponder listed on the center LNB, but generally cannot get some weaker ones on the offset LNBs.

A couple of suggestions: fine tune your skew settings on the offset LNBs, and try angling them in towards, and even past the dish center just a little bit. Tiny adjustments in the LNB position make a big difference in signal Q . You gotta work hard to find the sweet spot. A receiver with a signal beeper set up with a small TV right by the dish helps a lot. Peak your signal on the weakest transponder once you find the satellite you want.

I think the bottom line is that some weaker transponders are not going to be strong enough to receive with an offset from center LNB on an 8-foot dish, or even a ten footer.

Facing my dish the LNBs are left to right: 91w, 99w, 103w.

View attachment 77486View attachment 77487

Thanks for all the advice. After playing around quite a bit and shimming the base (its a circular ring floor mount) I determined i am not completely level. Once i build a foundation and get a fixed and level installation, I'll go back and retry.


Btw, stay the HELL away from a woman on dhgate.com who sells c band brackets for adding lnbs to a c bAND. The quality is horrible.

 

[PopcornNMore]

I can get 91, 99, qnd 107 quite well on one 8' dish. This dish has a long focal depth though which makes a difference. The longer the focal depth the better it will work with multiple feed horns.View attachment 77490

This now makes me wonder about my setup as seen in another post about Memorial Day projects. I thought having the scalar rings close together provided exactly 8 degrees separation. This could possibly explain why I was having trouble this weekend receiving Anik F1R at 107 with Galaxy 16 at 99 centered.

Would you please measure center to center and provide us with the measurement? Scalar ring touching scalar ring is 6.25" center to center. Your setup is probably more around 8" center to center.

 

[gabshere]

not endorsing the site, just looking at photos for examples. I've removed the HT at the front so you would need to add back to complete the link

holder
tp://www.aliexpress.com/fm-store/902804/210595913-395050531/New-design-LNB-Bracket-Holder-Mount-2-Satellite-Dish-LNBs-2-LNBs-on-1-Dish-Drop.html

dual Scaler (adjustable)
tp://www.aliexpress.com/fm-store/902804/210687346-441161588/C-Band-Dual-LNB-Holder-Dual-Satellite-LNB-Bracket-Holder-Free-Shipping-Drop-Shipping.html

dual scaler
tp://www.aliexpress.com/fm-store/902804/210687346-388718306/C-Band-Dual-LNB-Holder-Dual-Satellite-LNB-Bracket-Holder-Free-Shipping-Drop-Shipping.html

 

[icu1954]

This now makes me wonder about my setup as seen in another post about Memorial Day projects. I thought having the scalar rings close together provided exactly 8 degrees separation. This could possibly explain why I was having trouble this weekend receiving Anik F1R at 107 with Galaxy 16 at 99 centered.

Would you please measure center to center and provide us with the measurement? Scalar ring touching scalar ring is 6.25" center to center. Your setup is probably more around 8" center to center.

would you send a pic of your setup..popcorn ?

 

[PopcornNMore]

not endorsing the site, just looking at photos for examples. I've removed the HT at the front so you would need to add back to complete the link

holder
tp://www.aliexpress.com/fm-store/902804/210595913-395050531/New-design-LNB-Bracket-Holder-Mount-2-Satellite-Dish-LNBs-2-LNBs-on-1-Dish-Drop.html

dual Scaler (adjustable)
tp://www.aliexpress.com/fm-store/902804/210687346-441161588/C-Band-Dual-LNB-Holder-Dual-Satellite-LNB-Bracket-Holder-Free-Shipping-Drop-Shipping.html

dual scaler
tp://www.aliexpress.com/fm-store/902804/210687346-388718306/C-Band-Dual-LNB-Holder-Dual-Satellite-LNB-Bracket-Holder-Free-Shipping-Drop-Shipping.html

Have you ever purchased anything from this site? The products look interesting.

 

[PopcornNMore]

Attached are pictures of my current setup. I added the secondary C-band LNB two weeks ago having Galaxy 17 centered. The six LeSea Broadcasting channels were received on the secondary LNB from Galaxy 16 with a 57% signal. All other channels on Galaxy 16 couldn't be received.

Since Galaxy 17 only offered Reelz I decided to adjust the dish to have Galaxy 16 centered instead. With Galaxy 16 centered I expected signal from Anik F1R on the secondary LNB. I tried for hours adjusting the skew with no success.

If I was successful I wanted to add a third LNB to receive Galaxy 17 on the other side. I'm now thinking since this is a 6' dish I might remove the scalar on the secondary LNB and try to receive AMC 1.

 

[PopcornNMore]

The LNBF's used are GeosatPro's. The markings on the single are different than on the double output LNBF.

What LNB has markings 90 degrees off?

 

[Cham]

Just found the info for that 8' spun aluminum dish, it's actually 7' 8" diameter, focal length is 45".
The 91 LNB is exactly 8" from the 99 LNB center to center. The F1 LNB is 8.125" from the center LNB. The dish is not perfect; there are a few bends on it but still works well for it's condition.
I used 1/8" aluminum sheeting for the brackets cut from a part removed from a combine (note the color). Could likely get 6 degree spacing but that site wanted 91, 99, and 107. The dish had to be removed this spring and I am in the process of installing it again farther away from the house.
LNBFs are 1 ESX241, 1 C2, and 1 741 c/Ku unit.

 

[eastof111]

Here's what works for me receiving 99 and 103 on my ten footer. At first, I didn't want to touch the main feed, but I couldn't get the 99 feed to receive more than 70% of the transponders with the main feed pointed at 103. So, I had to dremel part of the main feed and the 99 feed. Bolted them together and they work fine on both 99 and 103.

 

[eastof111]

Sorry, forgot to post pix.

 

[gabshere]

Have you ever purchased anything from this site? The products look interesting.

no i was just searching around , price wasn't bad but figured international shipping just thought get ideal from pictures to rough one up

 

[oceansatellite]

not endorsing the site, just looking at photos for examples. I've removed the HT at the front so you would need to add back to complete the link

holder
tp://www.aliexpress.com/fm-store/902804/210595913-395050531/New-design-LNB-Bracket-Holder-Mount-2-Satellite-Dish-LNBs-2-LNBs-on-1-Dish-Drop.html

dual Scaler (adjustable)
tp://www.aliexpress.com/fm-store/902804/210687346-441161588/C-Band-Dual-LNB-Holder-Dual-Satellite-LNB-Bracket-Holder-Free-Shipping-Drop-Shipping.html

dual scaler
tp://www.aliexpress.com/fm-store/902804/210687346-388718306/C-Band-Dual-LNB-Holder-Dual-Satellite-LNB-Bracket-Holder-Free-Shipping-Drop-Shipping.html

Nice find, looks a lot better than the junk i bought.

 

[PopcornNMore]

Just found the info for that 8' spun aluminum dish, it's actually 7' 8" diameter, focal length is 45".
The 91 LNB is exactly 8" from the 99 LNB center to center. The F1 LNB is 8.125" from the center LNB. The dish is not perfect; there are a few bends on it but still works well for it's condition.
I used 1/8" aluminum sheeting for the brackets cut from a part removed from a combine (note the color). Could likely get 6 degree spacing but that site wanted 91, 99, and 107. The dish had to be removed this spring and I am in the process of installing it again farther away from the house.
LNBFs are 1 ESX241, 1 C2, and 1 741 c/Ku unit.

So, it is probably 1" for every degree. I'm off by 1.75". I bought some hardware at Lowes tonight that might work.

 

[PopcornNMore]

Confused and surprised!

Tonight I tried adjusting the secondary scalar ring out another 1.75” from the primary scalar ring in order to have the two C band LNB’s as close to 8” center to center as possible in order to receive Anik F1R which is 8 degrees away from Galaxy 16. After performing multiple blind scans and receiving nothing I gave up and switched to plan B.

Plan B was to remove the secondary scalar ring and use a Stanley WeatherGard galvanized 1” corner brace that I purchased at Lowes along with a 2” EMT clamp that allows the LNB to be adjusted very easily. After some adjusting and a few blind scans Anik F1R scanned in with a very good signal strength. I’m now receiving Disney, Weather Nation and other channels.
However, now I’m confused! I thought 8” center to center was needed to receive another C band satellite 8 degrees away? I know this is true on my 8’ dish. Is the distance different on a 6’ dish? Attached are pictures of my new setup.

 

[PopcornNMore]

Watched "Criminal Minds" on CTV Two tonight at 9PM with a signal over 70% on the secondary LNB. I'm still wondering why the measurement is only about 5" rather than 8". Now I want to add a third LNB to gain access to Galaxy 17 as well.

 

[Mr Tony]

Is the distance different on a 6’ dish?

yes. If you had scaler ring on the 2nd LNB they should overlap (as shown in this thread)
http://www.satelliteguys.us/c-band-satellite-discussion/147673-2-c-band-lnbs-6-foot.html