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travisnj
Last reply · posted in C-BAND Satellite Discussion

Need Help understanding length of Feed Horn Mount Legs

I have a 10' Mesh, the arms were uneven and measured bend to bend on 1/2" EMT conduit of 41 3/8" length... Now I have read and found my F/D... My intersection point of the strings to the back of the satellite (reflector) is 25 inches this would be d. Therefore F= (120*120)/(16*25) which equals 36 inches.

So, how to determine the proper length? Do I measure 36 from the back of the reflector to the tips of the scaler ring? to the back of the scaler ring?

I know this question may be bizzare but I really have tried very hard to find and solve my issues and so far have only been a "fizzle" of failure...

ANY assistance is GREATLY appreciated!!!!!
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sergei
sergei
Are these the original arms that came with the dish? If they are then I'd say there most likely the correct length and by moving the LNB/LNBF in or out of the scalar should get you the correct F/D position. Also remember, even if the tripod legs have the same length, that does not mean the feed is centered, so you might have to "bend" the feed back into center of dish, or adjusting the tripod legs to get the feed centered in the dish.
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T
travisnj
Legs

The legs for this dish were made from EMT pipe, this dish was made by a small company that came and went, they used houston tracker polar mount, bent their own frame for the mount, I am positive that the arms were not "engineered" to fit, they were bent onsite and installed... I just don't know how to go about making sure of the length.... I would like clarification of whether or not you should measure 36" from the "tips" of the scaler to the back of the reflector? or do you measure from the back of the scaler to the back of the reflector? So from the "tip" or the "flat" part of the scaler to the reflector would be one question I have..

Any comments are appreciated~!
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FaT Air
FaT Air
Focal length should be measured from approximately 1/4 inch inside the throat of the feed. Depending on the F'D setting the scalar could be 2 inches behind the sweet spot of the focal length. Because of all the inaccuracy in measurements and construction, fine tune the feed focal length (tweak) as necessary. Once you find the "Sweet spot" calculate F/D, and adjust/modify assembly to place the scalar on the feed at the correct position while keeping the feed throat at the "sweet spot".
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sergei
sergei
travisnj said:
The legs for this dish were made from EMT pipe, this dish was made by a small company that came and went, they used houston tracker polar mount, bent their own frame for the mount, I am positive that the arms were not "engineered" to fit, they were bent onsite and installed... I just don't know how to go about making sure of the length.... I would like clarification of whether or not you should measure 36" from the "tips" of the scaler to the back of the reflector? or do you measure from the back of the scaler to the back of the reflector? So from the "tip" or the "flat" part of the scaler to the reflector would be one question I have..

Any comments are appreciated~!
Click to expand...

I'm curious as to what your dish looks like, so could you post some pictures of what you have.
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Anole
Anole
I've always found this an inexact science.
I guess C-band isn't quite so critical, so people get away with a lot of slop.

This Chaparral web page discusses focal length and F/D.
If you scroll down about half way, there's a table of how far the feed should stick out of the scalar.
Perhaps you can apply that info to your very different hardware.

Theoretically, the best dishes I've seen to allow for easy optimization, are:
- some offset dishes ...
- some button hook buds ...
...where the LNB mount holds the feedhorn directly, and the scalar is only mounted to the feed.
That way, you independently adjust the feed for peak signal withOUT the scalar....
... then install and tune the scalar for best signal quality.

Most dishes mount the scalar at a fixed location, and you move the feed in 'n out.
That's pretty stupid, because as you tune the focal distance, you're simultaneously tuning the F/D ! - :rant:
That's how I spell, interaction.
Talk about a nightmare.

edit:
Well, come to think of it, there's a dish that is pretty reasonable.
I've looked at the lnb mount on the Paraclipse. (thanks for all the pix, Stogie)
You set the scalar and feed for proper F/D (as in the Chaparral info above), then...
The adjustment the dish gives let you move the whole assembly toward or away from the dish on long screws.
If you can trust your F/D setup, this approach gets the job done properly! - :up
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TWiT Tech Podcast Network
· posted in TWiT Tech Podcast Network

Tim Cook, Elton John & King Charles: A Royal Tech Event

Time for another AWESOME video from the TWIT Network!


View: https://www.youtube.com/shorts/oRVxjGm0qtE


Direct YouTube Link - Tim Cook, Elton John & King Charles: A Royal Tech Event
TWIT's Website
TWIT Live Feed
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TFLEV
· posted in TFLEV

Watch the New Tesla Roadster Jump, Fly and Barrel-Roll in Mid-Air!

Time for another AWESOME video from TFL Electric Vehicles!


View: https://www.youtube.com/watch?v=MyF_RH1m0mc


Direct YouTube Link - Watch the New Tesla Roadster Jump, Fly and Barrel-Roll in Mid-Air!
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TWiT Tech Podcast Network
· posted in TWiT Tech Podcast Network

The Apple HomeView

Time for another AWESOME video from the TWIT Network!


View: https://www.youtube.com/shorts/0k5iT-OlpdE


Direct YouTube Link - The Apple HomeView
TWIT's Website
TWIT Live Feed
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osu1991
osu1991
Pub Member / Supporter
Last reply · posted in TV Shows

Frisco King - Paramount Plus


View: https://youtu.be/RHYQYYm5jLM?is=cwxm9t1efsWNl6yy


December 18, 2026 Paramount plus
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Howard Simmons
Howard Simmons
osu1991 said:

View: https://youtu.be/RHYQYYm5jLM?is=cwxm9t1efsWNl6yy


December 18, 2026 Paramount plus
Click to expand...

Another Tulsa King spin off.🙄
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dishstaller
dishstaller
Howard Simmons said:
Another Tulsa King spin off.🙄
Click to expand...
But.....if you like Tulsa King....looks like you would probably like this as well. I don't mind spin-offs as long as they don't involve a sassy niece who moves from the big city :rolleyes:
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T
Therm
Last reply · posted in DISH Network Support Forum

Am I the only one that hates what Dish did to their mobile app?

I thought I would come here and find lots of complaints about the update to the dish anywhere mobile app, but am not seeing any. It used to look just like the desktop webpage. Now you can no longer filter by sports channels or movie channels. Plus that they made it look like a big button telephone and you see fewer channels in the screen which requires more scrolling. Yes I realize you can look at sports then select which sport you want to look at, I just liked being able to see all sporting events in the guide with all other channels being filtered out. Am I alone in the wilderness on this?
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Juan
Juan
Not alot of dish customers any more
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Foxbat
Foxbat
I'm not a big fan of the new layout, especially on my Apple TV. It used to look like the old Guide layout on the Hopper 3, but they changed parts of that, too.
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dishstaller
dishstaller
I really dislike change for the sake of change
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TheRatPatrol
TheRatPatrol
Last reply · posted in TV Shows

NCIS

Anyone else watch this show? Any guesses as to what was in the box Gibbs gave to Abby that was on her desk? It look liked it was glowing.

I also heard that someone was leaving the show at the end of this season. Any guesses as to who thats going to be?
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Jimbo
Jimbo
Jimbo
Jimbo said:

View: https://www.youtube.com/shorts/BIdMzUBHvjw?feature=share
Click to expand...

Howard ...
You don't like Tony, or Tony as the Director (he's only been there for 30 seconds now) or you don't like NCIS ?
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Howard Simmons
Howard Simmons
Jimbo said:
Howard ...
You don't like Tony, or Tony as the Director (he's only been there for 30 seconds now) or you don't like NCIS ?
Click to expand...
Tony as the director.🙄
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Jimbo
Jimbo
Howard Simmons said:
Tony as the director.🙄
Click to expand...
Would you rather have LaRoche ???
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dfergie
dfergie
I liked this episode and a toned down Tony...
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Howard Simmons
Howard Simmons
Jimbo said:
Would you rather have LaRoche ???
Click to expand...
No. Bring in someone new.🤔 Tony is not serious enough for me. Parker is too close to the team and Tim is too young to take over IMO.
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Jimbo
Jimbo
Howard Simmons said:
No. Bring in someone new.🤔 Tony is not serious enough for me. Parker is too close to the team and Tim is too young to take over IMO.
Click to expand...
I don't think Tim and Tony are that far apart in Age ...

Remember what Tony said to Tim when they first got back together ...
Tony said: I am the New Tony, Tim .... (something to that effect)

Tony has changed, he's been running his Security Business ... I'm sure he has grown up.

Give it time ... your judging the New Tony from the old Tony.

It sounds like Tim won't be around the Team much longer either.
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dishstaller
dishstaller
Pub Member / Supporter Lifetime Supporter
Last reply · posted in Movie Talk

Trailer for new Jim Caviezel movie Ghost Soldier

Might be worth a watch when it comes out. Looks like typical big corp against the little guy movie BUT....there is a reason this plot type is so oft repeated, it draws audiences.


View: https://www.youtube.com/watch?v=_-f9OGsKHd4
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dishstaller
dishstaller
BTW, I noticed right after I posted this that someone else had already mentioned it....sorry for the duplicate thread. Still looking forward to seeing the movie.
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meStevo
meStevo
Lifetime Supporter
Last reply · posted in Movie Talk

Project Hail Mary

If you're going try to read / listen to the book (can't recommend the audio book enough) before this comes out, I'd avoid trailers.

Trailer below, spoiling it to make sure you read the above bold message first. The book / audio book are fantastic. Go into this blind if you can IMO!


View: https://youtu.be/m08TxIsFTRI



Kind of disappointed at how much they show. A lot still to see, but man, some good reveals in the book that are just served up here.
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meStevo
meStevo
I've seen it twice. Can't recommend the audio book enough, Ray Porter's performance is amazing and there's so much more in the book than the movie.
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Foxbat
Foxbat
"Project Hail Mary" should be on Prime Video starting Friday, July 3.
www.ign.com

'It Is Time Go!' — Project Hail Mary Is Officially Coming to Prime Video

Amazon has confirmed that Project Hail Mary will be coming to Prime Video.
www.ign.com www.ign.com
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klang
Forgot to comment. I did watch when it first came out on MGM. I enjoyed it a lot. I think reading the book made it easier to watch. Several friends commented it was a little hard to follow.
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TRG
TRG
"astrophage". I read the book but didn't see the film yet.
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Howard Simmons
Howard Simmons
Foxbat said:
"Project Hail Mary" should be on Prime Video starting Friday, July 3.
www.ign.com

'It Is Time Go!' — Project Hail Mary Is Officially Coming to Prime Video

Amazon has confirmed that Project Hail Mary will be coming to Prime Video.
www.ign.com www.ign.com
Click to expand...
That's what I will be watching this weekend.🤗
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K
klang
Kindle book on sale for $2.99 today at Amazon.
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dishstaller
dishstaller
meStevo said:
.........there's so much more in the book than the movie.
Click to expand...
I agree. That can go for pretty much any book vs movie. Back when I was single I would read any Stephen King or John Grisham book I could get my hands on. When you read a book you make up the scenes and characters in your mind.....the movie version always disappoints.
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meStevo
meStevo
Lifetime Supporter
Last reply · posted in The Sports Section

NFL 2026-2027 Season

Schedule drops tomorrow. Mandatory mini camps in June. Hall of Fame game August 6th.
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Y
Yespage
Selfish Drake Maye holds back on giving the ball to Bills unlike Jags game, gets the win on the road.
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Y
Yespage
Yespage said:
Selfish Drake Maye holds back on giving the ball to Bills unlike Jags game, gets the win on the road.
Click to expand...
A big win for the Patriots, and they are now 3-2.

Browns lose a close one with... The Jets. That is a classic Browns loss (granted, any loss is a classic one it seems). 49'ers, Vikings, and Chiefs remain undefeated. The AFC north have a three way tie at 3-2 for second place. :eek:
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osu1991
osu1991
www.nbcsports.com

Troy Aikman seems to confirm he'll be leaving ESPN

Aikman says he looks forward to "where my next landing spot will be."
www.nbcsports.com www.nbcsports.com
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M
Mike0616
osu1991 said:
www.nbcsports.com

Troy Aikman seems to confirm he'll be leaving ESPN

Aikman says he looks forward to "where my next landing spot will be."
www.nbcsports.com www.nbcsports.com
Click to expand...
Hopefully nowhere near a microphone.
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Y
Yespage
Mike0616 said:
Hopefully nowhere near a microphone.
Click to expand...
After having experienced Gus Ferguson trying to call soccer games, I'm uncertain why NFL football analysts get hate. Even the "worst" of them are pretty good.
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meStevo
meStevo
Jalen Hurts out indefinitely as they treat and monitor a superficial blood clot in his leg.


View: https://x.com/RapSheet/status/2111074303185989663?s=20
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dishstaller
dishstaller
Pub Member / Supporter Lifetime Supporter
· posted in TV Shows

Started watching Undercover Boss again

I had quit watching this show years ago because I ended up more annoyed than entertained. Well......I'm STILL more annoyed than entertained. I DO find it interesting to see how things work behind the scenes at many businesses. What annoys me is how utterly out of touch CEOs are with the companies they run. At the end of almost every episode the head of the company is amazed at how hard the employees have to work and many times have to work around impossible guidelines set forth from headquarters.

I found this one interesting because the new CEO had big plans for this company, Muscle Maker Grill, and it looked like the stores were all pretty busy. Recent history hasn't been good to this company however. I bet the covid lockdowns were the real killer.


View: https://www.youtube.com/watch?v=yIhZm0qkz0o
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