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new style c and ku lnb
Ive been scanning the skys with my six foot solid bud with a c band only gospel lnb with disappointing results. The bud is on the clarke belt with good signal but I only seem to find religious channels or something other then english. The system I'm using to scan is a viewsat 9000hd with a vbox2 to move the bud. My question is with all the new technology what would be the best lnb to retrofit to my bud for c and ku sides. I'm hoping that the bud's size isn't the problem.
04-09-2008 08:17 PM
I honestly think a chaparall corotor with c and ku lnbs would be best. You need an analog receiver to control the skew. A pansat 2500A fta receiver has the servo output on it.
free to air does consist of a lot of religious channels and foreign language stuff. Various feeds too.
You will not find any free "cable" type channels with FTA. Don't confuse true Free to air with what other people do to get free channels illegally. That is signal theft NOT free to air.
It is a fun hobby.
Well, I'm no expert on the subject, but I read a lot here, and you find the folowing:
- many BUD lovers recommend 8 and 10 foot dishes for C-band
- some guys have 6' dishes, and seem to do quite well, but miss some high-FEC signals
- there are even a few crazies who run C-band on 4 foot dishes, so the 6'ers can't be all that wild.
- if you'll sift through the threads in the C-band/BUD section, you'll see where Linuxman has been experimenting with the
dual-band LNB, and getting good results.
- there is a competing unit from DMSI called a BSC-621, which may have been around longer; some have good results, so do not.
- if you are looking for a list of satellites and channels, we might direct you to the following:
* Ku & C band: TheList
* Ku & C band:
* Ku quickie:
Hope that gets you started in a few of the right directions.
And of course, hanging around the forum and reading threads of success stories may inspire you, as well.
Welcome to the forum. -
Straight Talk on AT&T iPhone 4, iOS 5.0.1, BB 3.10.01.
restoring broken iPhone 4S, iOS 6.1.3, BB 3.4.03.
: BirdView 8½' solid & GBox V3000.
: AMCI 8' perf (maybe a DH?) & AJAK-180.
If you want the best, I'll have to agree with truckracer, just remember the lowest "Stability Rating" on these lnb's are the best, and they are not cheap.
Originally Posted by truckracer
If you want the least expensive, yet adequately reliable, get the GeoSatPro CK1 or BSC621, and read the link posted in Anole's post above about the performance achieved by linuxman.
In my opinion a 6 foot dish is technically too small. They do work on some signals however.
A six foot dish cannot focus on one c-band satellite (two degree space in the sky).
It will see another degree or so from the neighboring satellites. This becomes a problem when the adjacent satellite is using the same frequency as the transponder you are trying to receive.
the 6 footer may have enough gain to get the signal but the sidelobe reception is too great.
The smaller dish sees to much of the satellites next door or undesireable signals.
This is critical on Digital reception. On analog - not so much.
two degree compliancy does not start usually until 8' of dish. Not all 8' dishes are 2 degree compliant. Most of the ones manufactured in the past several years are.
My 7.5' dish has a beamwidth (viewing angle) of 2.1 degrees. As you can see it has 0.1 too much reception of adjacent satellites. That does not sound like much but, If I am on a satellite doing a blind scan, sometimes it will scan in a transponder from the neighboring satellite with a low percentage of signal.
I also have a 10' dish. The 10' has a 1.7 degree beamwidth. It never does the above.
In fact the 10 footer is touchy if the positioner gets out of sync you will go from 100% signal to 0% signal with just a couple of clicks of the East / West buttons.
Ku band is three times more critical. Your 6 foot dish will make an excellent KU band dish since it's beamwidth at KU frequencies is much tighter. It will make it harder to aim on KU (if you are used to aiming small 30" dishes).
Iceberg (moderator here), gets good reception with his 6 footer. He has mastered the characteristics of that size reflector and does some amazing things with it.
I had a BSC-621 on my 10' when I first bought it new a few weeks ago. It just didn't work well on my 10' dish. I swapped out the unit for a Chaparall Corotor II with cheap lnbs that came with the "pack" (which I plan to replace with higher quality units). It performs much much better than the BSC-621.
Some members have got their C/ku lnbf to peform as well as a corotor. I was not so lucky.
I spend many hours experimenting and tuning to no success. I could get C-band to come in good but never got KU band to my satisfaction or anything like the corotor gets.
Thanks for your replys I'm going to do some research on the lnbs you have mentioned. The 6 foot dish does work awesome on ku with my invacom qph031 for sats like g10 etc, but like a little kid I always want more. I'm thinking that the blind scan might have some issues with these sats, so I'm going to hook up my old pansat 2500 and retest.
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