Question about lnbf for 121

[Labgate]

Hello

I made myself a poor man's superdish with three lnbs. I pretty love to play with things. I used a 75 cm starchoice dish.

I used two dss lnbs and I am able to receive 110 and 119 on my receiver.

For the 121 I tried using three different kinds of lnb. One invacom, one fortec and one besat.

If I connnect any one of those three lnbs on my pansat receiver, I'm able to receive all transceivers on 121 (of course not the channels because they are encrypted but the signal is there 60 -65 % quality).

However if I connect all three lnbs on a sw41 switch and do a check switch, it finds the 110, 119 and with the invacom it doesn't find anything and for the besat only the even channels.

Am I doing something wrong. What kind of lnb do I need.

Best regards

Labgate

 

[larrystotler]

The 121 uses an FSS LNB. The freq range is 11.7-12.2Ghz. The LNB SHOULD say what range it shoots for. As for whether the receivers see them, have you verified that they actually support that SW41(that is a Microyal switch and it may not show up properly on some receivers). If you have one, try the 121 and 119 with an SW21. The SW41 may also be bad.

 

[Labgate]

Hello

Thank you for your response. I have a pvr 510. When I check switch it sees a generic 41 switch.

I will try with my sw21. This is a good idea.

For my lnb. When I look on the fortec box it says :
BAND INPUT LO Gain (dB) V N.F.
Low 10.7-11.70 9.75 56 0.7 0.4
High 11.7-12.75 10.6 56 0.7 0.4

On the Be sat lnb is says :
INPUT : 10.70-11.70 Ghz
11.70-12.75 Ghz
OUTPUT 950~1,950 Mhz
1,100~2,150 Mhz
LOCAL FREQ: 9.75, 10.6 Ghz
GAIN:>50dB
Noise:0.3dB

Are they suppose to work with my receiver.

Thank you for your help. It is very much appreciated.

Best regards

Labgate

 

[larrystotler]

Both those LNBs should work fine with your system. However, the Generic_41 result is a sign of a problem. The 721 doesn't work with the DP+Twin, and gives that result when you run a switch check. Try running the check several times to see if you can get it to see that SW41 as an SW44.

 

[Labgate]

Hello

I tried to scan with the besat lnb. It still says Generic-41 lnb :

I tried to use the sw21 switch and then it only showed the 119 odd and even.

When connected on the sw41 switch it says on the 121 sat the polarity is only even and the device is Feed.

Well, what should I do next. Do you have any idea.

Labgate

 

[larrystotler]

Must be a problem with the LNB and E*'s system. Can you get ahld of an old P* single LNB? That would work for the 121 with no problem. When using those LNBs without a switch, they probably work fine, but with the switch, they fail. Kinda weird. It has to be the LNB tho.

 

[rkrenicki]

You cannot use a Universal LNB (which the Invacom and Fortec is), it must be a standard LNB. Make sure the LNB says "10750" under L.O., one that says "9750-10600" will not work.

Also, if you are using any Dishpro equipment (Switches or LNBs) then you will need a stacked LNB (like the old beer-can shaped Starchoice LNB)

 

[Labgate]

Thank you

I just bought a 10750 lnb on ebay. Even on the description it says it will work with dishnetwork.

So I will receive it in a couple of days and test it.

Last night very late I saw that we need a 10750 lnb. I don't have any, they are all like the invacom and the fortec.

I will get you updated.

Thank you.

Labgate

 

[Labgate]

Hello again

I decided not to wait and bought a 10750 lnb at a local store.
Everything works perfectly.

I even hooked up a small 18 inches dish to the fourth connection in the switch and I get all 4 sats (61.4,110,119,121).

Great

Thank you all

Labgate

 

[Smith P.]

The 121 uses an FSS LNB. The freq range is 11.7-12.2Ghz. The LNB SHOULD say what range it shoots for. As for whether the receivers see them, have you verified that they actually support that SW41(that is a Microyal switch and it may not show up properly on some receivers). If you have one, try the 121 and 119 with an SW21. The SW41 may also be bad.

You missed other important parameter - LOF of the LNBF, it must be 10.75 GHz for use with Dish receivers.

 

[larrystotler]

You missed other important parameter - LOF, it must be 10.75 GHz for Dish receivers.

No, I didn't. Ku-FSS is 11.7-12.2Ghz. Here is a quote about AMC-15 at the 105 from the SES Americom site:

Satellite information
Spacecraft design
Lockheed Martin A2100AX
Orbital location 105o W.L.
Launch Date / Vehicle 15 October 2004; Proton M/Breeze M
Design Life 15 years
Ku-band payload 24 x 36 MHz
Amp type Linearized TWTA 140 watts
Amp Redundancy two groups of 18 for 12
Receiver redundancy 4 for 2
Coverage CONUS, Alaska,Hawaii
Beacon 11702.0 MHz (H) -12198.0 MHz (V)

 

[Labgate]

Hello

What I noticed is as soon as I replaced the lnb with lof 9.75 10.6 with another one with a lof of 10750 it worked.
I did not changed anything and even add 61.5.

Labgate

 

[Smith P.]

The 121 uses an FSS LNB. The freq range is 11.7-12.2Ghz. The LNB SHOULD say what range it shoots for. <skip>

You still missed LOF parameter of recommending LNBF.
I'm not talking about satellite's parameters.