Repositioned Corotor LNB & Got 2 missing Tp's on G 25 BUT now other Tp's missing??

[jsattv]

I have been trying to pick up Tp's 11966 and 12155 on G 25 / 97.0W since installing my 12 Footer in November. So Today I removed my Circular LNB so I could easily rotate the entire C/KU LNB on my Corotor II today on my 12 Footer. Using my Trimax 2200 Sat Meter Tuned to 4 Tp's on G 25, I was able to rotate the Corotor II from the 11 and 5 o'clock positions - see picture, over to 1 and 7 o'clock positins, see pic # 2 and 11966 and 12155 came BOOMING IN??? Both Tp's have an S = 76 and Q = 77 - 85. I rescanned them in to get the channels, great...

Now the BAD NEWS: I have lost 12177, 11898, and a number of other Tp's with the LNB being in the new position which is about 90 degrees over from where it was. I can only get 12177 back if I move the entire LNB BACK to the 11 and 5 o'clock postion. My Question is how the heck can I get ALL the Tp's?? Is this a POLARITY thing??? Any replies would be greatly appreciated.

 

[truckracer]

Here is my signal levels with a corotor II dms c-band lnb, eagle aspen .6 ku lnb connected to a pansat 9200 HD

G25ku

12177V 50-57% quality
11936V 70%
11715 V 61%
11787V 41%
12052V 52%

 

[Anole]

Well, I'm no expert on this, but the 90º thing made me take a closer look.
It sounded suspicious.

Turns out, your first two transponders are Horizontal
Your last two transponders are Vertical.
And the 90º is how far you have to twist to go from Horizontal to Vertical, so . . .
Is the polarity/skew motor messed up, hooked up, set up correctly by the receiver?

Reference info from our own TheList.
(and as always, you shoot beautiful pictures)

 

[truckracer]

My horizontal KU band on G25 is booming in in the high 80's quality. So my vert's are down a little.

 

[jsattv]

Well, I'm no expert on this, but the 90º thing made me take a closer look.
It sounded suspicious.

Turns out, your first two transponders are Horizontal
Your last two transponders are Vertical.
And the 90º is how far you have to twist to go from Horizontal to Vertical, so . . .
Is the skew motor messed up, hooked up, set up correctly by the receiver?

Reference info from our own TheList.
(and as always, you shoot beautiful pictures)

Anole thanks, yes the Polorotor Control wires are hooked up okay at the back of the old Uniden 9900 & at the LNB, but I'm NOT sure if they are working because pressing "Skew" doesn't do anything?? I'll maybe try to measure the voltages out of the back of the Uniden 9900. It could be that Uniden 9900 because the + and - 36VDC for Actuator control also doesn't work with this (junky) Uniden Receiver.

 

[linuxman]

Hi Jsattv,

I set my Co-Rotors at the 10:30 - 4:30 position and don't ever touch it again. The skew control in your receiver which powers the servo motor is what brings in the transponders of both polarities.

Sounds like your servo is not working. They don't cost a lot, and can be replaced easily. You can check the motor only by taking it off and bring it into the receiver and hooking it up.

 

[jsattv]

Hi Jsattv,

I set my Co-Rotors at the 10:30 - 4:30 position and don't ever touch it again. The skew control in your receiver which powers the servo motor is what brings in the transponders of both polarities.

Sounds like your servo is not working. They don't cost a lot, and can be replaced easily. You can check the motor only by taking it off and bring it into the receiver and hooking it up.

Thanks a lot for the reply linuxman. I have an old Polorotor from my previous old Corotor with the old Teecom LNB that came with the 12 footer, and when I connect it to the back of the Uniden 9900 it buzzes?? Is that how you know if the Polorotor is working??

 

[linuxman]

and when I connect it to the back of the Uniden 9900 it buzzes?? Is that how you know if the Polorotor is working??

When you have the servo or whole Co-Rotor hooked to the back of the Uniden, the probe, or if just the servo, should move when you change channels from Vertical to Horizontal, and it should also move when you push the skew button.

If it just buzzes, it isn't moving the probe back and forth, and not functioning properly.

 

[jsattv]

When you have the servo or whole Co-Rotor hooked to the back of the Uniden, the probe, or if just the servo, should move when you change channels from Vertical to Horizontal, and it should also move when you push the skew button.

If it just buzzes, it isn't moving the probe back and forth, and not functioning properly.

Thanks a lot Fred, thats what I needed to know - the probe inside the Corotor II needs to move. I'll hook up the old Servo first and try it by pressing the Skew Button, then I'll bring in the Servo on the 12 Footer and try it - its likely not working, maybe the minus 35 below temps in Jan and Feb had an effect on it??

 

[linuxman]

It is possible that the probe itself is corroded and won't move.

When you take the servo motor off, you should be able to move the probe freely, but not with your fingers except from the motor side. Your fingers have acid on them that will corrode the probe.