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Old 03-25-2009, 01:47 AM   #46
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They were showing someone building an antenna like this on TV last night.
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Old 03-25-2009, 06:31 PM   #47
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Is there a question here, or are we just restating the obvious?

There are 3-4 threads on DIY antennas here and all over - do some searching.
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Programming: Dish AT120
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Receivers: DishNetwork Hopper w/Sling; DishNetwork Hopper 2000;3 - DishNetwork Joeys; 2 - TiVo HD Series 3; 2 - TiVo Series 2's; Accurian 6000; Samsung SIR-T351; Panasonic ShowStopper 2000; ATI HDTV Wonder
Dish 1000.2 on 110,119,129; Dish 500 on 61.5 - where I now get my HD Locals
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Old 03-30-2009, 07:02 PM   #48
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Default Home Built Antenna's = Lots of Fun!

I built my 1st "homebrew" a few weeks ago. Didn't have coat hangers so I ended up using 12 gauge romex. The thing worked well but had occasional dropouts. I ended up gluing foil onto cardboard then screwing the cardboard to the back of the 2x4 and BAM, no dropouts! See pics attached (antnoreflector, antwithreflector)...

Since that 1st build (which used 7 inch whiskers) I've built a model using 9-1/2 inch whiskers as well as a "Hoverman" (hoverman... jpg) see pics attached... The Hoverman surprised me with its bandwidth, picking up VHF-HI channels pretty clearly as well as UHF stuff... Hope these pics help someone. Take care & God bless... Bill
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File Type: jpg antnoreflector.jpg (28.3 KB, 247 views)
File Type: jpg anywithreflector.jpg (31.5 KB, 242 views)
File Type: jpg hoverman1.jpg (102.3 KB, 288 views)
File Type: jpg hoverman 4-1 balun.jpg (92.9 KB, 267 views)
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Old 04-02-2009, 11:31 AM   #49
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Quote:
Originally Posted by BillFromGI
The Hoverman surprised me with its bandwidth, picking up VHF-HI channels pretty clearly as well as UHF stuff...
Yep, as antenna designers have been saying, the coathanger antennas in the web videos are not good performers in comparison tests. Build a Grey Hoverman and get much better performance:

Hobbyists Create DIY Super TV Antenna
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Old 04-06-2009, 08:56 PM   #50
NASCAR IN HD
 
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Nice Balun, Bill
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VIZIO 55" VIZIO 26" Vizio 32",Directv HR24 HR24 AM21 H24 -Bose
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Old 04-07-2009, 04:02 PM   #51
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This is my version of a DB8 antenna. I purchased all of the material at home depot except for the RG6 cable, F cable connectors which are better for weather tight seal. I was amazed when I built my first one out of wood and 14-2 cooper wire and then pluged it into my HD TV and was amazed at the signal strength. So I decided to build one out of all aluminum. I was thinking build it for life. All material cost about around $45.00 but if you think about it this is actually two DB4 antennas on one mounting bracket. Got love the freedom of experiment.
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File Type: jpg SANY0176.jpg (66.3 KB, 188 views)
File Type: jpg SANY0173.jpg (73.7 KB, 182 views)
File Type: jpg SANY0172.jpg (80.2 KB, 196 views)
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Old 04-08-2009, 06:07 PM   #52
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Shouldn't the lines to the joiner be equal in length?
__________________
Seeking colinear harmonics!
Programming: Dish AT120
Displays: Sony VPH-D50Q FPCRT - 7 ft on the wall; Hitachi 57R59 RPCRT; Panasonic 42" Plasma; 26" Sanyo LCD
Receivers: DishNetwork Hopper w/Sling; DishNetwork Hopper 2000;3 - DishNetwork Joeys; 2 - TiVo HD Series 3; 2 - TiVo Series 2's; Accurian 6000; Samsung SIR-T351; Panasonic ShowStopper 2000; ATI HDTV Wonder
Dish 1000.2 on 110,119,129; Dish 500 on 61.5 - where I now get my HD Locals
Sony 80GB PS3;Sony 500GB PS3 Slim; Toshiba HD-DVD
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Old 04-13-2009, 11:38 AM   #53
A couch and an HDTV to go please.
 

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Default help on DB8

i am not sure i am new to this and would like any help and coments about it. i have one on my roof about 25' total height and it does pull in station about 41 miles away. and i didnt even put the wire on the back of mine so i am wondering if i should and would this help my signal pull in stronger. thanks for replying.
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Shouldn't the lines to the joiner be equal in length?
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Old 04-13-2009, 02:50 PM   #54
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Uneven lead lines can cause phasing problems and at certain frequencies, cause the signal from one array to cancel the signal from the other array.
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Seeking colinear harmonics!
Programming: Dish AT120
Displays: Sony VPH-D50Q FPCRT - 7 ft on the wall; Hitachi 57R59 RPCRT; Panasonic 42" Plasma; 26" Sanyo LCD
Receivers: DishNetwork Hopper w/Sling; DishNetwork Hopper 2000;3 - DishNetwork Joeys; 2 - TiVo HD Series 3; 2 - TiVo Series 2's; Accurian 6000; Samsung SIR-T351; Panasonic ShowStopper 2000; ATI HDTV Wonder
Dish 1000.2 on 110,119,129; Dish 500 on 61.5 - where I now get my HD Locals
Sony 80GB PS3;Sony 500GB PS3 Slim; Toshiba HD-DVD
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Old 04-14-2009, 06:16 PM   #55
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thanks for the help on this i will try to replace the short line with the correct lenth and will let you know how it works.
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Uneven lead lines can cause phasing problems and at certain frequencies, cause the signal from one array to cancel the signal from the other array.
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Old 04-19-2009, 03:04 PM   #56
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Default help on channel loss

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Originally Posted by cajunratt View Post
thanks for the help on this i will try to replace the short line with the correct lenth and will let you know how it works.
will this antenna work with these channels 6.1- 7.1- 12.1 - 29.1
having trouble with 6.1 channel.
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Old 04-19-2009, 05:30 PM   #57
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Your antenna is very similar to a CM4228, which has some gathering ability on VHF-high due to the continuous rear screen reflector/guard.

It appears that the 4228's screen is slightly further back from the whiskers (est. 5 inches) than is yours. Closed proximity of the reflector could favor higher frequencies.

6-1 is on channel 21 @ 234 degrees magnetic.
7-1 is on channel 8 @ 79 degrees magnetic.
12-1 is on channel 50 @ 236 degrees magnetic.
29-1 is on channel 30 @ 100 degrees magnetic.

7-1 should be the problem channel, but the others are also almost 180 degrees from each other.

Problems with 6-1 could be due to phasing, but might not be.
__________________
Seeking colinear harmonics!
Programming: Dish AT120
Displays: Sony VPH-D50Q FPCRT - 7 ft on the wall; Hitachi 57R59 RPCRT; Panasonic 42" Plasma; 26" Sanyo LCD
Receivers: DishNetwork Hopper w/Sling; DishNetwork Hopper 2000;3 - DishNetwork Joeys; 2 - TiVo HD Series 3; 2 - TiVo Series 2's; Accurian 6000; Samsung SIR-T351; Panasonic ShowStopper 2000; ATI HDTV Wonder
Dish 1000.2 on 110,119,129; Dish 500 on 61.5 - where I now get my HD Locals
Sony 80GB PS3;Sony 500GB PS3 Slim; Toshiba HD-DVD

Last edited by jim5506; 04-19-2009 at 05:38 PM.
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Old 04-20-2009, 06:21 AM   #58
A couch and an HDTV to go please.
 

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Default help on channel loss

Quote:
Originally Posted by jim5506 View Post
Your antenna is very similar to a CM4228, which has some gathering ability on VHF-high due to the continuous rear screen reflector/guard.

It appears that the 4228's screen is slightly further back from the whiskers (est. 5 inches) than is yours. Closed proximity of the reflector could favor higher frequencies.

6-1 is on channel 21 @ 234 degrees magnetic.
7-1 is on channel 8 @ 79 degrees magnetic.
12-1 is on channel 50 @ 236 degrees magnetic.
29-1 is on channel 30 @ 100 degrees magnetic.

7-1 should be the problem channel, but the others are also almost 180 degrees from each other.

Problems with 6-1 could be due to phasing, but might not be.
thanks jim
i will try removing the back screen to try to see what will happen to signal strenth on all the channels it doesn't hurt to try to experiment with it .
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Old 04-20-2009, 04:09 PM   #59
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You can "tune" the preferred channels by moving the screen and by adjusting the length of the cat whiskers.
__________________
Seeking colinear harmonics!
Programming: Dish AT120
Displays: Sony VPH-D50Q FPCRT - 7 ft on the wall; Hitachi 57R59 RPCRT; Panasonic 42" Plasma; 26" Sanyo LCD
Receivers: DishNetwork Hopper w/Sling; DishNetwork Hopper 2000;3 - DishNetwork Joeys; 2 - TiVo HD Series 3; 2 - TiVo Series 2's; Accurian 6000; Samsung SIR-T351; Panasonic ShowStopper 2000; ATI HDTV Wonder
Dish 1000.2 on 110,119,129; Dish 500 on 61.5 - where I now get my HD Locals
Sony 80GB PS3;Sony 500GB PS3 Slim; Toshiba HD-DVD
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Old 04-21-2009, 07:30 AM   #60
A couch and an HDTV to go please.
 

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You can "tune" the preferred channels by moving the screen and by adjusting the length of the cat whiskers.
thanks jim
i will try about 1" on the whiskers to see if this will help. this morning i could not even catch 6.1 and 7.1 and after about 9a.m. the signal came in. i dont think that these stations are ready myself i think they are the ones with the problems. just to let you know i also have a rear hdtv in the back room with a small regular antenna and when i have a signal problem i check the signal on it to compare both that way i know if it is my antenna are not. i sure thank you for all your help.
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