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Have been experimenting with 2 old dishes today to determine which is a beter overall performer.
Dish #1 is an old Direcway that measures 23" high X 40" wide (920 SQ").
Dish #2 is an old SKY dish that measures 33" high X 30.5" wide (1,006.5 SQ").
Used the same LNB on both on the same pole mount. Aligned each to peak on 123 with a Birdog. Weather clear (not a cloud in the sky).
Difference between the 2 on both signal strength and quality was dramatic:
#1 Max SS = 72 Max Q 69
#2 Max SS = 90 Max Q 89
Yes, Anole, I adjusted the focal length to peak for each one
.
Question: Obviously dish #2 performs way better - is this due to the 9.4% additional reflector area or is the height of the dish more important that width? Dish #2 is also closer to being symetrical - effects?
Other that determining that the rescued SKY is way superior, I think all I've done is to raise alot of questions in my mind about dish size and overall design shape. These are impressive number improvements for just under 10% total area change.
What am I missing here or are these type of numbers to be expected?
PS: Am toying with the idea of somehow flipping the old DW dish 90 degrees to see what shakes!
Dish #1 is an old Direcway that measures 23" high X 40" wide (920 SQ").
Dish #2 is an old SKY dish that measures 33" high X 30.5" wide (1,006.5 SQ").
Used the same LNB on both on the same pole mount. Aligned each to peak on 123 with a Birdog. Weather clear (not a cloud in the sky).
Difference between the 2 on both signal strength and quality was dramatic:
#1 Max SS = 72 Max Q 69
#2 Max SS = 90 Max Q 89
Yes, Anole, I adjusted the focal length to peak for each one
.Question: Obviously dish #2 performs way better - is this due to the 9.4% additional reflector area or is the height of the dish more important that width? Dish #2 is also closer to being symetrical - effects?
Other that determining that the rescued SKY is way superior, I think all I've done is to raise alot of questions in my mind about dish size and overall design shape. These are impressive number improvements for just under 10% total area change.
What am I missing here or are these type of numbers to be expected?
PS: Am toying with the idea of somehow flipping the old DW dish 90 degrees to see what shakes!
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signal on 123°?
I would have expected better Q on the DirecWay dish, due to it attenuating the noise from the next bird over at 125°.
You say you used the same LNB.
I gotta think it's a round one, which much better matches the Sky dish.
Wish you'd posted pix.
But, it's still fun guessing! -
BTW, I spent some time this afternoon brainstorming with one of my buddies, how to best mount two matched LNBs 'n horns to the DirecWay.
I'll prove it's better if it kills me! Or you! -
I would have expected better Q on the DirecWay dish, due to it attenuating the noise from the next bird over at 125°.
You say you used the same LNB.
I gotta think it's a round one, which much better matches the Sky dish.
Wish you'd posted pix.
But, it's still fun guessing! -
BTW, I spent some time this afternoon brainstorming with one of my buddies, how to best mount two matched LNBs 'n horns to the DirecWay.
I'll prove it's better if it kills me! Or you! -
I'm envious! You live in that house year around, and you are watching sat tv!
I'd be out on the beach like this:
There ya go!
If you used the same LNB shown on the SKY picture, then the DirecWay won't perform worth diddly.
That LNB doesn't see the entire dish properly.
My DirecWay dish has a matching feedhorn, but not the LNB.
And, I have nothing that'll bolt to the feedhorn.
So, I'll be testing with the hardware shown below.
And hoping it'll match (see / illuminate) the dish pretty well.
Didn't you have a spare DirecWay LNB around there?
Seems I recall you saying you did.
So, slap it on the DirecWay and then do the comparison again.
That's the only way to make for a fair test.
BTW, your view kills me!
I don't know how you can put up with all that eye-abuse!
I thought we were looking for the big molded DirecTV dishes?
But another DirecWay? Cool!
Properly installed and tuned, they can be pretty nice.
You might want to use one for an orphanage.
So, I wouldn't want to beat you out of it.
Of course, maybe the SKY dishes are easier to find.
I have some LNBs that look like the one you show.
Perhaps that combination is the best way to go for the kids.
Picture of bandstacked LNB with oval feedhorn, is from Global-CM web site. I have some.
The little Universal LNB came from a close-out deal at IvyStonePlace couple of years back.
There ya go!
If you used the same LNB shown on the SKY picture, then the DirecWay won't perform worth diddly.
That LNB doesn't see the entire dish properly.
My DirecWay dish has a matching feedhorn, but not the LNB.
And, I have nothing that'll bolt to the feedhorn.
Didn't you have a spare DirecWay LNB around there?
Seems I recall you saying you did.
So, slap it on the DirecWay and then do the comparison again.
That's the only way to make for a fair test.
BTW, your view kills me!
I don't know how you can put up with all that eye-abuse!
I thought we were looking for the big molded DirecTV dishes?
But another DirecWay? Cool!
Properly installed and tuned, they can be pretty nice.
You might want to use one for an orphanage.
So, I wouldn't want to beat you out of it.
Of course, maybe the SKY dishes are easier to find.
I have some LNBs that look like the one you show.
Perhaps that combination is the best way to go for the kids.
Picture of bandstacked LNB with oval feedhorn, is from Global-CM web site. I have some.
The little Universal LNB came from a close-out deal at IvyStonePlace couple of years back.
I need to dig into the shed, but I'm positive I've got another LNB for the DW. Picked up that other DW arm this afternoon, but no LNB on it
. Rest of the hardware is on it though. Will let you know what I come up with.Yea, the view sucks, but someone needs to do it. No grass to cut either
.You know, I had that DW dish mounted on the test bench and never got really great Q numbers on it - but I'l mount it again with the OEM LNB on it and report back on numbers.
I don't use the DW dishes for the orphanages. Way too heavy, and the tripod mounts are a bear to come by. The stamped international dishes work well for that and just use standard J poles.
SKY dishes like this one are all over the place down here - but many of them are still in use (even though folks hate the service). LNB that is on them is crap though - but they are linear round ones so replacing is a breeze.
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Sometimes a thread gets so many posts in it that is can cause issues for the server so that why today we introduce The Song Name Game Part 3!
So let the game continue!
The last song was added by Bobby who posted...
One Meat Ball - Andrews Sisters
CONTINUE ON AND HAVE FUN! WELCOME HOME TO SATELLITEGUYS.US!
Here are the original rules for the game as posted by WebbyDude back in 2006. http://www.satelliteguys.us/threads/68645-Song-Name-Game
Just name a song title and the band who performed it. The next person does the same thing, but needs to list a song title or band name which includes a word from the previous entry. Pick songs from any genre.
Example:
Long Live Rock and Roll -- Rainbow
Rainbow in the Dark -- Dio
Another example:
Ride the Lightning -- Metallica
Lightning Strikes -- Ozzy Osbourne
Get it?
An additional note: we all know that song titles, sometimes, use profane words. Because this is a family friendly website it is advised that you clean up that title up a bit. This is accomplished by using something like sh!t instead of the real word. Thanks....
So let the game continue!
The last song was added by Bobby who posted...
One Meat Ball - Andrews Sisters
CONTINUE ON AND HAVE FUN! WELCOME HOME TO SATELLITEGUYS.US!
Here are the original rules for the game as posted by WebbyDude back in 2006. http://www.satelliteguys.us/threads/68645-Song-Name-Game
Just name a song title and the band who performed it. The next person does the same thing, but needs to list a song title or band name which includes a word from the previous entry. Pick songs from any genre.
Example:
Long Live Rock and Roll -- Rainbow
Rainbow in the Dark -- Dio
Another example:
Ride the Lightning -- Metallica
Lightning Strikes -- Ozzy Osbourne
Get it?
An additional note: we all know that song titles, sometimes, use profane words. Because this is a family friendly website it is advised that you clean up that title up a bit. This is accomplished by using something like sh!t instead of the real word. Thanks....
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