| Author |
Message |
    
Sniper_62881
Junior Member
Username: Sniper_62881
Post Number: 32
Registered: 7-2005
| | Posted on Tuesday, April 04, 2006 - 4:52 pm: | 
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I have heard that you can convert a regular TV satelitte dish into a Cb antenna. First of all, is this true? Second of all how does a person go about doing this? If anyone has some info on this I'd appreciate your input. Thanks
marc/cef613 |
Hollowpoint445
Senior Member
Username: Hollowpoint445
Post Number: 1158
Registered: 6-2004
| | Posted on Tuesday, April 04, 2006 - 8:07 pm: |
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No. |
Bruce
Senior Member
Username: Bruce
Post Number: 3722
Registered: 9-2003
| | Posted on Wednesday, April 05, 2006 - 7:00 am: |
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Sniper_62881
To work the dish would have to be at least 36 foot wide and would have the gain of a 2 elm beam. |
Road_warrior
Senior Member
Username: Road_warrior
Post Number: 1319
Registered: 7-2004
| | Posted on Wednesday, April 05, 2006 - 10:14 am: |
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Can you imagine seeing that mounted on
your roof or yard...LOL |
Hotwire
Senior Member
Username: Hotwire
Post Number: 1128
Registered: 1-2005
| | Posted on Thursday, April 06, 2006 - 5:55 pm: |
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I found in a magazine "Handy" a dish shaped tv antenna. Supposed to be HD ready and all that. They claimed it will work for base cb radios, scanners and such! BULL! It is impossible. I doubt you would even be able to recieve a cb signal. I will try to find the ad again or a web address. |
Bruce
Senior Member
Username: Bruce
Post Number: 3724
Registered: 9-2003
| | Posted on Friday, April 07, 2006 - 7:17 am: |
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Hotwire ...
I worked for Sperry microwave in R&D on MMW radars ( 90-200 GHZ )for 4 years. At 96 GHZ a 6 foot dish has a gain of 60 DBD ( Times X =1,000,000 )so for each watt you put out it looks like 1,000,000 fed to a groundplane.
Now you have to realize that at 96 ghz a WAVELENGTH is about .1 INCH and at cb it is about 410 inches..... and the gain of a dish is dependent on how many waves across it is ......
SO a 6 foot dish on 96,000 MHZ is good for 60 DBD to get that kind of gain on CB it would have to be 24,600 FOOT across......
Dishes do not even start to be used under 440 mhz ...... |
Hotwire
Senior Member
Username: Hotwire
Post Number: 1132
Registered: 1-2005
| | Posted on Friday, April 07, 2006 - 12:17 pm: |
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Bruce, I know and I know you know what your talking about.
I was just adding my 2 cents about some mumbo jumbo I seen in a magazine.
respectfully,
Hotwire |
Bruce
Senior Member
Username: Bruce
Post Number: 3726
Registered: 9-2003
| | Posted on Friday, April 07, 2006 - 6:41 pm: |
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hotwire I knew you did still the size at 27 is mind boggling |
Tech237
Moderator
Username: Tech237
Post Number: 266
Registered: 4-2004
| | Posted on Tuesday, April 11, 2006 - 12:47 pm: |
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Hey Bruce,
maybe you could use the dish as a groundplane, but which way up do you use it? |
Bruce
Senior Member
Username: Bruce
Post Number: 3737
Registered: 9-2003
| | Posted on Tuesday, April 11, 2006 - 10:46 pm: |
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Hummmm now if the wife would only let me build this
http://www.keplerian.com/dish/4.5m_dish.html |
Sniper_62881
Junior Member
Username: Sniper_62881
Post Number: 49
Registered: 7-2005
| | Posted on Wednesday, April 12, 2006 - 7:51 am: |
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I get the handy magazine too maybe i have it in there
marc/cef613 |
Al_lafon
Intermediate Member
Username: Al_lafon
Post Number: 194
Registered: 3-2005
| | Posted on Thursday, April 13, 2006 - 12:49 am: |
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Ok here is a base antenna to think about
go to hamuniverse.com and look for 2 METER COLINEAR do the math i have the lower 2 5/8
on the air here at 27 Mhz 100 mile + SSB any
nite on ground wave no power 12 watts. The top
of antenna is 78 feet. |
Hotwire
Senior Member
Username: Hotwire
Post Number: 1158
Registered: 1-2005
| | Posted on Thursday, April 13, 2006 - 1:17 pm: |
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Sniper, It was in a Handy mag from 2 or 3 years ago! If you can find it let us know ok? peace!!!73 |
Tech237
Moderator
Username: Tech237
Post Number: 276
Registered: 4-2004
| | Posted on Thursday, April 13, 2006 - 1:44 pm: |
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You're using a 2m antenna on 11m??? |
Sniper_62881
Member
Username: Sniper_62881
Post Number: 52
Registered: 7-2005
| | Posted on Monday, April 17, 2006 - 9:28 pm: |
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Oh ok hotwire, i have just recently subscribed.
marc/cef613 |
