Copper Talk » Ask The Tech » Antennas » Satellite dish = CB antenna???? « Previous Next »

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Sniper_62881
Junior Member
Username: Sniper_62881

Post Number: 32
Registered: 7-2005
Posted on Tuesday, April 04, 2006 - 4:52 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

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
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Hollowpoint445
Senior Member
Username: Hollowpoint445

Post Number: 1158
Registered: 6-2004
Posted on Tuesday, April 04, 2006 - 8:07 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

No.
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Bruce
Senior Member
Username: Bruce

Post Number: 3722
Registered: 9-2003
Posted on Wednesday, April 05, 2006 - 7:00 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

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.
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Road_warrior
Senior Member
Username: Road_warrior

Post Number: 1319
Registered: 7-2004
Posted on Wednesday, April 05, 2006 - 10:14 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Can you imagine seeing that mounted on
your roof or yard...LOL
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Hotwire
Senior Member
Username: Hotwire

Post Number: 1128
Registered: 1-2005
Posted on Thursday, April 06, 2006 - 5:55 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

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.
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Bruce
Senior Member
Username: Bruce

Post Number: 3724
Registered: 9-2003
Posted on Friday, April 07, 2006 - 7:17 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

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 ......
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Hotwire
Senior Member
Username: Hotwire

Post Number: 1132
Registered: 1-2005
Posted on Friday, April 07, 2006 - 12:17 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

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
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Bruce
Senior Member
Username: Bruce

Post Number: 3726
Registered: 9-2003
Posted on Friday, April 07, 2006 - 6:41 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

hotwire I knew you did still the size at 27 is mind boggling
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Tech237
Moderator
Username: Tech237

Post Number: 266
Registered: 4-2004
Posted on Tuesday, April 11, 2006 - 12:47 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Hey Bruce,
maybe you could use the dish as a groundplane, but which way up do you use it?
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Bruce
Senior Member
Username: Bruce

Post Number: 3737
Registered: 9-2003
Posted on Tuesday, April 11, 2006 - 10:46 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Hummmm now if the wife would only let me build this

http://www.keplerian.com/dish/4.5m_dish.html
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Sniper_62881
Junior Member
Username: Sniper_62881

Post Number: 49
Registered: 7-2005
Posted on Wednesday, April 12, 2006 - 7:51 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

I get the handy magazine too maybe i have it in there

marc/cef613
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Al_lafon
Intermediate Member
Username: Al_lafon

Post Number: 194
Registered: 3-2005
Posted on Thursday, April 13, 2006 - 12:49 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

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.ant
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Hotwire
Senior Member
Username: Hotwire

Post Number: 1158
Registered: 1-2005
Posted on Thursday, April 13, 2006 - 1:17 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Sniper, It was in a Handy mag from 2 or 3 years ago! If you can find it let us know ok? peace!!!73
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Tech237
Moderator
Username: Tech237

Post Number: 276
Registered: 4-2004
Posted on Thursday, April 13, 2006 - 1:44 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

You're using a 2m antenna on 11m???
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Sniper_62881
Member
Username: Sniper_62881

Post Number: 52
Registered: 7-2005
Posted on Monday, April 17, 2006 - 9:28 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Oh ok hotwire, i have just recently subscribed.

marc/cef613

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