need strong dvb- transponder on 30w

[hank123]

Anyone know if 12052 V or H is a strong transponder on 30w? Needs to be Dvb-s

Its only sitting 2.9 degrees where I am at in Colorado. Not sure if I can make her. Need something strong to test with.

Thanks

 

[lost_mesa]

My two strongest signals are 11884 V 27500 and 12132 H 27500. Both are DVB-S QPSK. They are slightly stronger here than the two you mentioned.

30w is about 2.3 degrees above the horizon here. I get it fine on a 1.2 meter dish, a 90 cm wouldn't get anything.

 

[hank123]

Cool! Thanks! I know what I'm doing tonight.

 

[danristheman]

You might have to invert your dish for that elevation. 11884h transponder for cubavision. I had my dish aimed towards the ground i got it to work.

 

[hank123]

You might have to invert your dish for that elevation. 11884h transponder for cubavision. I had my dish aimed towards the ground i got it to work.

My only worry is my the apt building or trees might block me. Dang thing is going to be looking almost dead east.
If I invert my neighbors will think im super nuts.

 

[lost_mesa]

Most dishes will hit the pole before you can get them down anywhere near 2.9 degrees elevation. Inverting the dish on the mount gets around this problem.

 

[hank123]

Most dishes will hit the pole before you can get them down anywhere near 2.9 degrees elevation. Inverting the dish on the mount gets around this problem.

View attachment 124488

Word! Thanks for that. If you can hit it I think I can too.

 

[jorgek]

Even better and less complicated than inverting dish, is to tilt the mast down towards the sat.

 

[hank123]

Well I cant get it on my channel master 1.0m Not sure what the heck is going on.
Tried inverting in and noting.

Does anyone know what the off set is for these? I cant find anything on google. I was thinking about 15 deg.
I tried inverting it for galaxy 97 and I can not hit that too.

Anyideas?

 

[phlatwound]

Most of the offset dishes I have seen are in the low-mid 20 degrees, not sure about yours.

 

[bigg t]

View attachment 124487

My only worry is my the apt building or trees might block me. Dang thing is going to be looking almost dead east.
If I invert my neighbors will think im super nuts.

All the more reason to do it. I didn't need to invert here but then again I don't live in Colorado.

 

[hank123]

Most of the offset dishes I have seen are in the low-mid 20 degrees, not sure about yours.

Well 20s+20s+2.9 would be 42.9 ++++.

 

[danristheman]

Hank your to high on elevation. i bet try 22.9 also look at satbeams to help you out.

 

[a33]

Does anyone know what the off set is for these?
...
Anyideas?

Set the dish to exactly vertical, and then read the elevation scale. Then you have the offset-angle.

Unless, of course, the scale is unreliable.....

greetz,
A33

 

[a33]

Addition (after some thinking):
The new dish-angle would indeed (only) be offset angle plus 2.9, as danristheman wrote.

I'm trying to visualize the new value for your inverted scale. That would be offset angle minus 2.9; if I'm not mistaken.
If you leave the scale part on the pole, and just invert the dish to upside down (if that is possible with your dish), the new scale value depends on the angle of the construction between pole/scale part and dish. These parts are not always parallel....

greetz,
A33

 

[lost_mesa]

A couple of suggestions. The first is to use the sun to see if you actually have line of sight to 30w. Otherwise you are trying to do the impossible.

There are a few web sites that will tell you when the sun is at the same position as a satellite. Here is one: http://www.satellite-calculations.com/Satellite/suninterference.php
Enter your location and select Hispasat. Scroll down for the results. It looks like the max outage period for Colorado will be around March 4th to 7th. At the peak interference time, see if the sun is hitting your dish. If it isn't, you won't be able to receive the satellite. Ideally the sun should have been above your neighbors house for a few minutes before the peak interference time. Otherwise the beam of your antenna may be picking up too much ground noise.

You can also use the sun to align the dish. I taped small mirrors to my dish and at the peak interference time aligned the dish so the sun reflections were on the LNBF. (tip of the hat to polygiver for this idea.) I bought small craft mirrors off of ebay, about $5 or $6 for a half a dozen. This got me almost dead on, I was able to blind scan in many of the channels.

The first photo is of some mirrors on another dish, just to show what I did. The second photo is of the 1.2 meter dish pointed at 30w, at the peak interference time.

 

[catamount]

http://www.satelliteguys.us/xen/attachments/inverted_offset_math-jpg.96334/

Found this chart from our good friend Fat Air (sadly departed). If you invert the dish, your elevation scale should read approximately 51 degrees..

If you don' invert you would set your dish at -21 degrees from vertical. You would have to tilt your mast way down.

Catamount

 

[catamount]

Looked around and I believe your offset is 22.6 degrees, so close to above numbers. Adjust accordingly.

 

[hank123]

http://www.satelliteguys.us/xen/attachments/inverted_offset_math-jpg.96334/

Found this chart from our good friend Fat Air (sadly departed). If you invert the dish, your elevation scale should read approximately 51 degrees..

If you don' invert you would set your dish at -21 degrees from vertical. You would have to tilt your mast way down.

Catamount

How are you coming up with that number?

 

[Titanium]

If the dish was inverted and the reflector is straight up/down (angle finder on reflector vertical axis reading 0 degrees), the dish would be looking at point 22.6 degrees below the horizon. To aim at 2.9 degrees above the horizon, place a straight edge on the vertical axis of the dish and tilt it back to set a angle of 25.5 degrees. Offset Angle + Satellite Elevation Angle = Reflector Surface Elevation Angle (22.6 + 2.9 = 25.5 degrees) or (25.5 - 22.6 = 2.9 degrees).