High Def Forum - Your High Definition Community & High Definition Resource

Go Back   High Def Forum - Your High Definition Community & High Definition Resource > Local HDTV Info & Reception > Local HDTV Info and Reception
Rules HDTV Forum Gallery LINK TO US! RSS - High Def Forum AddThis Feed Button AddThis Social Bookmark Button Groups

Local HDTV Info and Reception Learn about your local HDTV stations, availability, reception issues, OTA antennas and any other local issues. RSS - Local HDTV Info and Reception

Like Tree3Likes

coat hanger antenna

Reply
AddThis Social Bookmark Button
 
Thread Tools
Old 12-12-2008, 08:06 AM   #31
What is HD?
 

Join Date: Dec 2008
Posts: 3
Default

Quote:
Originally Posted by tigerbangs View Post
The only caution that I would offer is to be absolutely sure that the lengths of wire between bays is EXACTLY the same, and that the wires should be drawn taut...
Pardon my limited vocab, but this is referring to the wires that go up and down the board? What about the whiskers? how exact do they need to be? Mine are within a range of about 1/4" of smallest to biggest. Do I need to try to shave them down or anything?

I need to clarify a bit: each of the eight "V"s are the same length straightened, but the bend in each "V" is within ~1/8" of the exact center. Do I need to try to shave that down?
regibbons is offline   Reply With Quote
Old 12-13-2008, 02:48 PM   #32
High Definition is the definition of life.
 

Join Date: Oct 2008
Location: Eastern Idaho
Posts: 3,068
Default

The phase lines are the long lines that run the length of the board. It is important that they be the same length for maximum gain from the antenna. If they're off a little, gain is reduced but the antenna stills receives OTA signal. Mine did. :-) The whiskers should be the same length. A 1/8" difference likely has no effect on antenna gain.
IDRick is offline   Reply With Quote
Old 01-06-2009, 09:54 PM   #33
My plasma is High Def.
 

Join Date: Jan 2009
Posts: 7
Default Coat hanger antenna

I made this one today with 10awg copper mag wire. I used terminal blocks that bolt down for better connections. Because of that, the spacing of the vertical wires is closer that 2 inches. I'm not sure how that may affect things but it's working fine in the attic with 4 tv's split and all other dimensions are typical (7" wiskers but an inch more that is in the terminal block, 5.75 spacing).
I looked up formulas about transmissin lines. Maybe the vertical wires being 300 ohms is the key if you consider it a transmission line from the top to bottom whiskers, but just a guess. Impedance = 276 times the log of distance between wires divided by radius of the wire. Meaning Z=276 x log (distance/radius).
My wire has a radius of .05". With a distance of 1" that is 359 ohms.
A distance of .62 would be 301 ohms. So maybe I am OK with the vertical wires about 1 inch apart. Any engineers here?
I wonder what the radius of a typical coat hanger is?
Attached Images
File Type: jpg Antenna.jpg (37.4 KB, 330 views)

Last edited by Goodrat; 01-07-2009 at 12:52 PM.
Goodrat is offline   Reply With Quote
Old 01-13-2009, 09:10 PM   #34
My plasma is High Def.
 

Join Date: Jan 2009
Posts: 7
Default

oops, I think that should be diameter, not radius.
Goodrat is offline   Reply With Quote
Old 01-24-2009, 08:01 PM   #35
722k,722, 612, 512 HR34
 

Join Date: Feb 2008
Location: SD
Posts: 1,151
Default

Heres my coat hanger antenna....actually copper wire 14awg since i didnt have enough metal hangers....

It pulls in signal better than this HD phillips amplified antenna ($30)

Im getting fox at 76% now instead of 72 with no drop-outs.....best thing is i dont have to have anything plugged in anymore.





It will eventually make its way into the attic above this tv.....antenna is feeding my home theater just below this room.
Jodean is offline   Reply With Quote
Old 01-27-2009, 02:50 PM   #36
NASCAR IN HD
 
spokybob's Avatar
 

Join Date: Feb 2008
Location: NW Illinois
Posts: 546
Default

My Vanna antenna.

I use a CM4221 feeding my DISH622, but I use this coathanger hooked up to ANT1 when I am recording a OTA and I want to watch another OTA. I use separate YouTubes on the garage & bedroom sets. I live 20 to 27 miles from the towers.
__________________
Bob
VIZIO 55" VIZIO 26" Vizio 32",Directv HR24 HR24 AM21 H24 -Bose
spokybob is offline   Reply With Quote
Old 01-27-2009, 09:05 PM   #37
Hmmm
 

Join Date: Nov 2007
Posts: 58
Default

Ok but you could at least solve the puzzle.
LOL

Tim
mxz800 is offline   Reply With Quote
Old 01-28-2009, 01:33 PM   #38
High Definition is the definition of life.
 

Join Date: Oct 2008
Location: Carthage NC
Posts: 84
Default

remove the coating from thye wires and you might see a little increase in reception, as the insulation is also insulating it from the signal except for the very tip end.
jbabb is offline   Reply With Quote
Old 02-18-2009, 09:34 AM   #39
What is HD?
 

Join Date: Feb 2009
Posts: 1
Default Refining Coat Hanger Antenna--better reception?

First I'd like to thank everybody on the HighDef Forum for sharing their info and photos of the HDTV antennas.

I'd watched the youtube video but the info here was much more detailed and especially the pictures really showed me how it was supposed to go.

I made my antenna with the 10" whiskers and longer spacing as was mentioned here, because I live in the boondocks and knew reception was pretty bad. I just used the coat hangers for whiskers and some leftover copper speaker wire for the phase wires.

Question: If I replace the coat-hanger wire with good quality copper wire, will it be likely to improve my reception? Or is it more crucial to have the antenna up higher, (in my attic) to improve reception?

From the tvfool printout I'm getting everything at NM 34.9 but nothing lower, and I'd like to improve that.

Thanks again for all of you sharing your knowledge with those of us who are beginners!
TopiaryCow is offline   Reply With Quote
Old 02-18-2009, 06:36 PM   #40
High Definition is the definition of life.
 

Join Date: Oct 2008
Location: Eastern Idaho
Posts: 3,068
Default

Quote:
Originally Posted by TopiaryCow View Post
First I'd like to thank everybody on the HighDef Forum for sharing their info and photos of the HDTV antennas.

I'd watched the youtube video but the info here was much more detailed and especially the pictures really showed me how it was supposed to go.

I made my antenna with the 10" whiskers and longer spacing as was mentioned here, because I live in the boondocks and knew reception was pretty bad. I just used the coat hangers for whiskers and some leftover copper speaker wire for the phase wires.

Question: If I replace the coat-hanger wire with good quality copper wire, will it be likely to improve my reception? Or is it more crucial to have the antenna up higher, (in my attic) to improve reception?

From the tvfool printout I'm getting everything at NM 34.9 but nothing lower, and I'd like to improve that.

Thanks again for all of you sharing your knowledge with those of us who are beginners!
The youtube DIY are alright but there are better ones derived from computer models. Take a look at mclapp's plans at: http://www.frontiernet.net/~mclapp/Antennas/
IDRick is offline   Reply With Quote
Old 02-21-2009, 02:19 PM   #41
How can anyone watch standard def?
 

Join Date: Jan 2009
Posts: 15
Default

Is this the transformer for the antenna? Or wont this one work.
http://www.acehardware.com/product/i...Id=35834912323
Pure is offline   Reply With Quote
Old 02-21-2009, 02:36 PM   #42
High Definition is the definition of life.
 

Join Date: Oct 2008
Location: Eastern Idaho
Posts: 3,068
Default

Pure, Correct, I am using the same balun on my mclapp design 4-bay.
IDRick is offline   Reply With Quote
Old 02-21-2009, 07:09 PM   #43
How can anyone watch standard def?
 

Join Date: Jan 2009
Posts: 15
Default

So i made my coat hanger antenna. Didn't work so well at my house. (Didn't expect it to) But I took it to my cabin on the side of a mountain and it worked beautifully.
Pure is offline   Reply With Quote
Old 03-23-2009, 11:01 AM   #44
FTA and Yagi user
 

Join Date: Mar 2009
Location: Ontario's South Coast
Posts: 1
Thumbs up My first try...

Well thanks to everyone's post on this forum, I finally got around to building my first antenna.... and guess what? The sucker worked first time out of the gate.
Tomorrow when the temp is a little nicer and the wind has calmed down I'm going to elevate it another 10 feet or so.
I live on the north shore of Lake Erie and right now at about 20 feet I am pulling in Toronto, it's a little fuzzy but it's there, I figure 30 feet according to tvfools' website should get me the optimum reception.
I am using the 9.5" X 4 whisker configuration if anyone wants to know. Thanks again for all of the great posts, all I had to do was read what everyone else tried and then built one for myself, only took me about 1 hour and all I had to buy was the washers, a whole 68 cents with tax.
Jetman47 is offline   Reply With Quote
Old 03-23-2009, 05:26 PM   #45
digital DX'n is alive
 
smdp1's Avatar
 

Join Date: Feb 2007
Location: Greenhill, AL.
Posts: 701
Default

I've built two....one worked great for the folks I made it for...the other was turd
__________________
my antenna is bigger than yours...lol couldn't resist
smdp1 is offline   Reply With Quote
Sponsored Links
Go Back   High Def Forum - Your High Definition Community & High Definition Resource > Local HDTV Info & Reception > Local HDTV Info and Reception
AddThis Social Bookmark Button
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads to coat hanger antenna
Thread Thread Starter Forum Replies Last Post
Problems with Coat Hanger Antenna instanium Local HDTV Info and Reception 6 07-16-2009 06:45 PM
Have Strong Antenna Signal (100), but Local HD channels are choppy and pixelated annointed3 Local HDTV Info and Reception 14 11-09-2008 05:21 AM
New Antenna and Fios TideRipper Local HDTV Info and Reception 9 05-11-2008 10:15 PM
what Antenna?...Battle Creek, MI kevin1968 Local HDTV Info and Reception 12 09-18-2007 10:24 AM


All times are GMT -6. The time now is 02:11 AM.



Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0
Copyright ©2004 - 2008, High Def Forum