NetStumbler.org Forums

Go Back   NetStumbler.org Forums > WiFi Forums > Hardware
Reload this Page DirecTv dish
Register Search Today's Posts Mark Forums Read

Reply
Page 2 of 3 < 1 2 3 >
 
LinkBack Thread Tools Display Modes
Old 02-09-2006   #16 (permalink)
Thorn
Did you do the math?
 
Thorn's Avatar
 
Join Date: Apr 2002
Location: Villa Straylight
Posts: 10,084
Quote:
Originally Posted by DagNasty
... I assumed DirecTv ditched the primestar dishes because their form isn't made for the directv band. ...
It's more likely that the LNBs and the rest of the receiver setup wasn't compatible, rather than the dish per se.

Quote:
Originally Posted by DagNasty
... Let's say you have 1 dish and you feed it 2 different frequencies. Would the focal point be the same for the 2 dishes?
Uh, don't you mean the two frequencies?

In any event, the focus isn't really effected by the dish. There are two things which really influence a parabolic antenna's focus: The depth of the dish and the diameter. Look at Scruge's Parabolic Dish spreadsheet. Parabolic Dish Templates made easy
__________________
Thorn
"I'm The Doctor. I'm a Time Lord. I am from the planet Gallifrey in the constellation Kasterborous. I'm 903 years old and I am the man who is going to save your lives and all 6 billion people on the planet below... You got a problem with that?"
Thorn is offline   Reply With Quote
Old 02-09-2006   #17 (permalink)
Scruge
Nyuk nyuk!
 
Scruge's Avatar
 
Join Date: Jan 2005
Location: TX
Posts: 1,380
Quote:
Originally Posted by DagNasty
Scruge:
Would the focal point be the same for the 2 dishes?
I would say yes to the focal point, I assume you meant frequencies. However the gain may be slightly different depending on the frequency.

Keep in mind that consumer satellite dishes, depending on the service are designed for different purposes. Some are actually 2 dishes in one set at different angles to pull from more than one satellite. You'll find some services providing a range of sizes from 18" thru 36" affording more gain for those customers in weak signal areas.

My guess as to why there's a lot of Ku surplus would be that it has poor penetration properties verses C band. Overcast and stormy weather knocks it out.
Scruge is offline   Reply With Quote
Old 02-09-2006   #18 (permalink)
Barry
Managing the iTards.
 
Barry's Avatar
 
Join Date: Dec 2002
Location: Ohio
Posts: 5,367
Quote:
Originally Posted by Scruge
I would say yes to the focal point, I assume you meant frequencies. However the gain may be slightly different depending on the frequency.

Keep in mind that consumer satellite dishes, depending on the service are designed for different purposes. Some are actually 2 dishes in one set at different angles to pull from more than one satellite. You'll find some services providing a range of sizes from 18" thru 36" affording more gain for those customers in weak signal areas.

My guess as to why there's a lot of Ku surplus would be that it has poor penetration properties verses C band. Overcast and stormy weather knocks it out.

That's why our dishes are 3 feet. Mine's also 40' in the air to clear all the trees.
__________________
Atheism is a non-prophet organization.
Barry is offline   Reply With Quote
Old 02-09-2006   #19 (permalink)
dakkon2k
proselyte
 
dakkon2k's Avatar
 
Join Date: Jul 2005
Location: Quite a bit EAST & a smidgen south of the world famous Rat. 2 miles from the beach or 1/2 a mile from a golf course and liquor store, or 2 miles from a Gun store or 5 miles from a hooters or a "adult nightclub"
Posts: 894
Quote:
Originally Posted by DagNasty
dakkon2k:
You've just adapted into being very presumptious, but I do not blame you, for I have seen at least 1 forum in my life. Why not just save yourself the time and not even post if it seems someone is looking to be spoonfed? Honestly, I was not.
Denis Leary wrote a song for me, guess which one
Peace out!
__________________
Unable to apply patch, Please install M$ Outlook to continue.
A journey of a thousand posts begins with How To Ask Questions The Smart Way
dakkon2k is offline   Reply With Quote
Old 02-09-2006   #20 (permalink)
streaker69
Psychic Amish Stumbler
 
streaker69's Avatar
 
Join Date: Jul 2004
Location: Virginville, BlueBall, Bird In Hand, Intercourse, Paradise, PA
Posts: 11,798
Quote:
Originally Posted by dakkon2k
Denis Leary wrote a song for me, guess which one
Peace out!
"Your mom blows goats" ?
__________________
"One of these days, I'm going to cut you to pieces."

If you're offended by this post, please feel free to report it to one of the many helpful moderators of this forum.

Thank you.
streaker69 is offline   Reply With Quote
Old 02-09-2006   #21 (permalink)
dakkon2k
proselyte
 
dakkon2k's Avatar
 
Join Date: Jul 2005
Location: Quite a bit EAST & a smidgen south of the world famous Rat. 2 miles from the beach or 1/2 a mile from a golf course and liquor store, or 2 miles from a Gun store or 5 miles from a hooters or a "adult nightclub"
Posts: 894
Quote:
Originally Posted by streaker69
"Your mom blows goats" ?
!
I thought that video had been replaced by Paris or Pams. Damn it, guess I need to re-seed it.
__________________
Unable to apply patch, Please install M$ Outlook to continue.
A journey of a thousand posts begins with How To Ask Questions The Smart Way
dakkon2k is offline   Reply With Quote
Old 02-09-2006   #22 (permalink)
Airstreamer
Sniffin' the aether
 
Airstreamer's Avatar
 
Join Date: Nov 2004
Location: A little North of Reason
Posts: 2,743
Quote:
Originally Posted by Thorn
It's more likely that the LNBs and the rest of the receiver setup wasn't compatible, rather than the dish per se.

Uh, don't you mean the two frequencies?

In any event, the focus isn't really effected by the dish. There are two things which really influence a parabolic antenna's focus: The depth of the dish and the diameter. Look at Scruge's Parabolic Dish spreadsheet. Parabolic Dish Templates made easy
@dagnasty: And read the REST of the thread as well, including links.
__________________
Try a tube of the new lube,

Obamacaine!

They won't feel the shaft until it's too late!
Airstreamer is offline   Reply With Quote
Old 02-09-2006   #23 (permalink)
DagNasty
Registered Member
 
Join Date: Jan 2006
Posts: 78
Quote:
Originally Posted by Thorn
Uh, don't you mean the two frequencies?
Yep. Sorry, I was on the way to class. So frequency plays no role in the focal point of a dish? Assuming the wave fits inside the dish, of course.

By the way, where can I get copper sheet metal for the biquad? If you shave all the green coating off a PCB will you end up with a copper sheet? Where can I get the sheet copper they are using? Can I use alluminum instead? Is it hard to solder? Does it reflect as good as copper?

... off to read that whole thread...

When I get these 2 done I'll test it to see how far of a link I can get and post the results.
Last edited by DagNasty : 02-09-2006 at 04:20 PM.
DagNasty is offline   Reply With Quote
Old 02-09-2006   #24 (permalink)
streaker69
Psychic Amish Stumbler
 
streaker69's Avatar
 
Join Date: Jul 2004
Location: Virginville, BlueBall, Bird In Hand, Intercourse, Paradise, PA
Posts: 11,798
Quote:
Originally Posted by DagNasty
Yep. Sorry, I was on the way to class. So frequency plays no role in the focal point of a dish? Assuming the wave fits inside the dish, of course.

By the way, where can I get copper sheet metal for the biquad? If you shave all the green coating off a PCB will you end up with a copper sheet? Where can I get the sheet copper they are using? Can I use alluminum instead? Is it hard to solder? Does it reflect as good as copper?

... off to read that whole thread...

When I get these 2 done I'll test it to see how far of a link I can get and post the results.
I don't know where you would get it around there, but around here, there's several metal shops that will sell ya whatever you need. Some of the metal shops I've been to around here will cut and bend whatever you need if you give them the plans. Cheaper than buying your own Shear/Brake.

I've seen some copper sheeting in Lowes/HD but don't know the sizes available.

If you happen to be around a Surplus City they have several different types of sheeting, Stainless, Aluminum and Copper.
__________________
"One of these days, I'm going to cut you to pieces."

If you're offended by this post, please feel free to report it to one of the many helpful moderators of this forum.

Thank you.
streaker69 is offline   Reply With Quote
Old 02-09-2006   #25 (permalink)
wrzwaldo
I amuse you?
 
Join Date: Dec 2003
Posts: 9,127
Quote:
Originally Posted by DagNasty
Yep. Sorry, I was on the way to class. So frequency plays no role in the focal point of a dish? Assuming the wave fits inside the dish, of course.

By the way, where can I get copper sheet metal for the biquad?
Rat Shack used to sell copper clad.

Quote:
If you shave all the green coating off a PCB will you end up with a copper sheet?
No, you end up with a glass epoxy dielectric sheet with a bunch of copper traces on it.


Quote:
Where can I get the sheet copper they are using?
If you don't have a Rat Shack you can try http://www.partsexpress.com/webpage....ak=copper_clad
wrzwaldo is offline   Reply With Quote
Old 02-09-2006   #26 (permalink)
Scruge
Nyuk nyuk!
 
Scruge's Avatar
 
Join Date: Jan 2005
Location: TX
Posts: 1,380
Quote:
Originally Posted by DagNasty
By the way, where can I get copper sheet metal for the biquad? If you shave all the green coating off a PCB will you end up with a copper sheet? Where can I get the sheet copper they are using? Can I use alluminum instead? Is it hard to solder? Does it reflect as good as copper?
I don't think removing the fiberglass from a pcb will do any good other than leave you with a flimsy piece of copper. I've seen biquads made using pcb. You might also try your local auto parts store. They should have brass shim material in various thicknesses 12" x 36" x .001 - .010" rolls. Its easy to work with and solder.

For that matter you can do a proof of concept using tin flashing from local hardware store.
Scruge is offline   Reply With Quote
Old 02-09-2006   #27 (permalink)
Thorn
Did you do the math?
 
Thorn's Avatar
 
Join Date: Apr 2002
Location: Villa Straylight
Posts: 10,084
Aluminum will be hard to solder. You can get copper and brass sheets from hobby shops. Both are much easier to solder.
__________________
Thorn
"I'm The Doctor. I'm a Time Lord. I am from the planet Gallifrey in the constellation Kasterborous. I'm 903 years old and I am the man who is going to save your lives and all 6 billion people on the planet below... You got a problem with that?"
Thorn is offline   Reply With Quote
Old 02-09-2006   #28 (permalink)
MikeP928
Heeere's your sign!
 
MikeP928's Avatar
 
Join Date: May 2002
Location: Mexico Beach, FL
Posts: 1,164
Quote:
Originally Posted by dakkon2k
Denis Leary wrote a song for me, guess which one
Peace out!
Come on, tell him what you really meant.

Peace on you! Fornicate Elsewhere!

MikeP
__________________
Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote.
-- Benjamin Franklin, 1759
MikeP928 is offline   Reply With Quote
Old 02-09-2006   #29 (permalink)
G8tK33per
Asshole Emeritus
 
G8tK33per's Avatar
 
Join Date: May 2003
Location: S.E. VA.
Posts: 5,932
Quote:
Originally Posted by dakkon2k
Denis Leary wrote a song for me, guess which one
Peace out!
"I'm an Asshole!"
__________________
"Benjamin is nobody's friend. If Benjamin were an ice cream flavor, he'd be pralines and dick."

Sons of Confederate Veterans
G8tK33per is offline   Reply With Quote
Old 02-09-2006   #30 (permalink)
wiresalot
Registered Member
 
wiresalot's Avatar
 
Join Date: Mar 2005
Location: Slightly off center.
Posts: 483
Quote:
So I've been looking into doing the primestar dish mod with a diy biquad design, but after looking at dish specs for both primestar and directv they both seem to be designed for frequencies below 2.4ghz. I only have a directv dish to work with and was wondering if anyone could give me some input. I can't find anything on google comparing the directv dish to the primestar dish.
I have built this one from a DirectTV dish with verry good results.

http://www.engadget.com/2005/11/15/h...-dish-antenna/
wiresalot is offline   Reply With Quote
Reply
Page 2 of 3 < 1 2 3 >

« Modifying an Airlink+ PCMCIA card | Parabolic Dish Templates made easy »

Thread Tools
Display Modes
Linear Mode Linear Mode

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



Google
 
Web NetStumbler.org

All times are GMT -7. The time now is 02:31 AM.

Contact Us - NetStumbler.org - NetStumbler.com - Online Backup - Archive - Top

Powered by vBulletin® Version 3.6.8
Copyright ©2000 - 2008, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.0.0 ©2007, Crawlability, Inc.


All messages express the views of the author and are for entertainment purposes only. Netstumbler.org cannot be held responsible for the authenticity of the content or the actions of its members. By using this site and its services, you warrant that you will not post any messages that are discriminating, obscene, hateful, threatening, or otherwise violates any laws and you release Netstumbler.org from any future claims of any kind whatsoever including, but not limited to, addiction and loss of productivity. All forum messages, private messages and any other content are properties of Netstumbler.org. Even if publicly available, personal or copyrighted information are not to be posted without the consent of the owner. Distribution of licensed and copyrighted materials in any way not endorsed by the copyright owner is strictly prohibited. You may not use this site and its resources to spam other sites or individuals or perform any action that violates any law. Items sold or bought in the For Sale forum are sold as is and no warranty or insurance of any kind is provided. Netstumbler.org cannot be held responsible for the outcome of any transactions and no warranty of any kind is provided, either express or implied. Vulgar words are not allowed in the subject lines ; they may be used in the message body in any forum. The Administrator, Super Moderators and Moderators of Netstumbler.org have the right to remove, edit, move or close any thread for any reason and to reveal your identity and other known information in the event of a complaint or legal action arising from any message posted by you.