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Thread: 40" C/Ku - Band Dish
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- 06-02-2005 09:33 AM #21
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ADVERTS 1
Ice, I thought you were trying Cband?
Edit: I think you're trying for a Ku sig first so you can line the dish up.
Edit 2: There are at least 3 feeds on Ku you'll get a signal off from F1
- 06-02-2005 09:33 AM # ADS
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- 06-02-2005 09:35 AM #22
The No Pain Train
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Proud Staff Membernot yet...I'll try the C-Band on G10 and see if that works...otherwise, I'll put the other 36 up and aim it to a true south (G11 through T5), get the KU and then try C-Band...much easier since I dont have a meter
Originally Posted by Cascade 
Winegard 76cm dish, SG2100 motor, Sadoun dual KU LNB..... Directv Slimline SWM 3 LNB.... GeoSatPro 36" dish with Sadoun dual KU LNB... Coolsat 5000 on motorized.... Manhattan RS1933....Directv HR34 (yes the 5 tuner monster) GeoSatPro 200 to aim dishes.... few receivers not set up yet
Two 6 foot Fortec dish with GeoSatPro dual C-Band LNB "ghetto moved" to various C-Band satellites
- 06-02-2005 11:28 AM #23
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Who is going to start the C-Band on an 18" dish post?
I am thinking of creating extention panels for my 1.2m to make it a 1.8m or greater. I will be posting my results soon.
Dishes: 240cm (8') WS International Dish, C-Band * 180cm (6') Fortec Dish, C-Band * 180cm (6') Channel Master Dish, C-Band * 120cm (4') Channel Master Dish, SG2100 H-H, KU-Band * 36" X 26" Channel Master (StarBand) Dish, DBS * 18" Dish, DirecTV, DSS LNBF * Dish 1000+, Dish Network
OTA Antennas: Terk TV-32 UHF Antenna, (Pittsburgh, PA locals) * Antennacraft MXU59 UHF Antenna, (Johnstown, PA locals)
Receivers: VIP722 Dish Network * Coolsat 4000 Premium * Coolsat 6100 PVR * Openbox S9 HD PVR * Motorola DSR-410DS
- 06-02-2005 11:36 AM #24
On vacation
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I did that in the 80's with my 1 m dish in the UK......................can't really say how much it helped the signal, but its a great project.
18" C-Band dish.........theres an idea!
- 06-02-2005 12:16 PM #25
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Wasn't C-band on a 30" tried, with only 3 or so analogue signals as a result? I'd guess that an 18" pizza-dish would be close to useless... then again, we're doing the impossible already...
... so nevermind
- 06-02-2005 12:16 PM #26
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Good news!
I pointed the throat of the ASC421 at AnikF1 (by hand).
I'm now getting 89% sig on NewsWorld.
Who needs a dish...
- 06-02-2005 12:19 PM #27
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lol
- 06-02-2005 03:10 PM #28
SatelliteGuys Junkie
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PSB -
Do you sell these LNBF's? I'm extremely interested. I know the c-band lnbf on my 5 ft dish does pick up siignal's from c-band on the Primestar dishes, but that was back in the mostly analog days. IA-5 was real watchable, but AMC 4 and G3 had interference. Thanks!
- 06-02-2005 03:40 PM #29
SatelliteGuys Regular
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I was thinking about extending my 30" as well until I started to think about parabolas. You gain nothing from the extentions as the dish depth also has alot to do with it. Here is a site that goes into the formula of constructing a porabola.:
http://www.analyzemath.com/parabola/ParabolaDefinition.html
Even if you moved the lnb out to compensate for the extention, you then would not be in focus (convergence) for the inside of the dish, just in focus for the extension.
What I thought of doing was taking a sheet of aluminum and making an ARC so as to focus into the antenna from only two directions(instead of 360 degrees). I think if you figure in the length and depth of dish a person should be able to figure out the optimum focal depth for the LNB (point of convergence). I figure that the lnb would have to be centre mounted. I have seen a string method of easily seeing if you lnb is at the point of convergence. I'll try to find it and post later.
- 06-02-2005 08:26 PM #30
SatelliteGuys Regular
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I did try C-Band on my 30" dish with no sucess on digital signals, however there were a few analog signals that I could watch with a whole lot of noise in the picture but there were as watchable as the 3 channels we had in the before cable days off from an antenna as a kid.
You might be able to tune the LNBF and get some digital off from a 30". What I did was simply mount the LNB on the dish and play, I didn't try to do any serious tuning and think I only tried a blind scan on one satellite and came up with nothing.
I am thinking that the WB that PSB found wasn't HD. If it is tp 1 on G11 we use it all the time in cable and it is not HD. It might be that an adjacent satellite was throwing enough noise into the signal to not get a good (bitrate) or signal into the receiver.
The problem with the little dishes and C-Band is not so much the gain of the dish as the selectivity of it to null out other satellites interference.
I am glad you guys have expiermentd with it and I plan on getting my 1.2M up with the C-Band LNBF on it to see what I can get digitally. It is not a replacement for a BUD but rather an addition to the KU dish.
Wholeshoe
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