Shaw 107 and 111 on 48" round dish, Alaska

[arcticracer]

Well yesterday I made my first attempt to get more than one LNB working on a single dish. All I have are round (non-elliptical) dishes, various sizes. I am in Central Alaska, the 48" is pointed at 107, so I left it there and fashioned a second bracket for another KU lnb and looked for a "hot spot" to see if I could find 111. I found it with the LNB's touching each other, and the 111 LNB slightly lower by 1/2 inch. I know this is the sort of setup Iceberg is using too. I'm going to go look for his pictures again.

I was wondering if folks have gotten better results by "detuning" the dish to about halfway between 107 and 111, and sort of centering the LNB's. I am going to experiment this weekend with a spectrum analyzer from work and see what I come up with. Some of the HD channels on 111 are pixellating and are marginal now. I think I can afford to lose signal on 107 if I pick more up on 111 and get everything at once.

 

[Mr Tony]

I'll save ya the headache to search. Here are the pics

 

[Mr Tony]

But what me personally would do is aim at 111.1 and put 107 offset. You need more signal for HD than you do SD so I have 111.1 boresight and the 107 LNB offset

 

[arcticracer]

Shaw 107 and 111

Thanks Iceberg, that makes sense, I'll try aiming at 111. I have a huge signal on 107, around 89 on channel 299. I can afford to lose some. That should do the trick. Looking forward to getting the Olympic broadcasts from the host country, got things working just in time.

 

[Mr Tony]

what receiver do you have? a 505?

I dont check signal...I check ebno which is options 6-4-7 line C...gives more "true" readings on how good the signal is.

 

[arcticracer]

Shaw Direct Tuning

Ebno would be good to tune, but since I have access to a Spectrum Analyzer I'll connect it right at the feed and fine tune the LNB's and dish. Can use C/N. Have to be careful and use a DC block, I use a splitter, then run one leg through the block and to the Specan through an F to N adapter.

Using ebno, and my wife with a radio would be the second choice. Or a long cable and TV outside.

 

[Mr Tony]

SA works better

 

[arcticracer]

505

Yes, I have a refurb 505 I bought from a dealer in Edmonton, $99.

 

[arcticracer]

New Andrew 1.2 Meter

No need now for dual LNB, I just picked up some more dishes. 1.2 Meter Andrew, 1.2 Meter steel dish, and 1.8 Meter Andersen True Focus. Two were free, the big one was $175.

I put the Andrew on Shaw 111, and my old 1.2 steel dish is on 107. Will have to update the "Dish Farm" pics this weekend.