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Old October 9th 04, 10:37 AM
Johann Höchtl
 
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Default Self made antenna for CB

Hello,

i would like to make my own antenna for CB radio, mostly because i am
interessted in the technics involved, not strictly because of saving
some money.

I was googling a while but unfortunately the information i gathered was
rather unsatisfactory. Quite some theory but lack of practical descriptions.


Are there good links to pages how to make it's own antenna?


I am interessted in an antenna which gives me a good trade of between
gain, ease of operation and ease of manufacturing.

I think now that either a "long wire antenna" or a dipole would be the
best for my purpose. I would place both vertically on a fishing rod.
A horizontal adjustment would yield better results in DX but not so good
results for near communication, right?

But i wonder how i can make a balun on my own. I guess i need a 1:1
balun for the dipole (i use rg58 to the radio) or a 1:4? balun for the
long wire.

Would the two antenna types be a good choice?

Any help would be appreciated.

Greetings,
Johann
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Old October 9th 04, 04:29 PM
 
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http://www.citizensband.iofm.net/equip/antenna.php

stuff about CB antennas how to trim / tune,
not to technical.


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Old October 9th 04, 04:34 PM
 
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http://www.citizensband.iofm.net/projects/dipole.php


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Old October 9th 04, 04:37 PM
 
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http://home.att.net/~wizardoz/cbmw/a...abri.html#doit


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Old October 10th 04, 03:48 PM
WA8ULX
 
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Dan/W4NTI wrote:
Get yourself a empty can of coffee. Place a light bulb in it. Hook the
coax to it. Remember the shield goes to the negative of the bulb.

Seal the can with lead solder.
Bury 15 feet underground.

Enjoy.


Dan I think you forgot to mention it has 20DB GAIN.


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Old October 12th 04, 12:43 AM
Dan/W4NTI
 
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No Bruce, this was my reference antenna.

Dan/W4NTI

"WA8ULX" wrote in message
...
Dan/W4NTI wrote:
Get yourself a empty can of coffee. Place a light bulb in it. Hook

the
coax to it. Remember the shield goes to the negative of the bulb.

Seal the can with lead solder.
Bury 15 feet underground.

Enjoy.


Dan I think you forgot to mention it has 20DB GAIN.



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Old October 10th 04, 03:49 PM
WA8ULX
 
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Can you use a crisco can? I have a lot of those laying around from our
crisco slather partys.


YES you can, and if you use a Bunch of them wired in series you get more GAIN,
figure 10DB more Gain for each CAN
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Old October 10th 04, 10:42 PM
Richard Harrison
 
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Johann wrote:
"A horizontal adjustment would yield better results in DX but not so
good results for near communication, right?"

To reach beyond line-of-sight but not very distant locations, usually
requires a reflection from the ionosphere nearly directtly overhead.

Vertical antennas tend to have a null directly overhead and tend to
behave poorly for areas beyond line-of-sight that require an ionospheric
reflection nearly overhead.

Low horizontal wires radiate substantial energy as antennas at high
angles to the horizon, and thus they are suited to reaching areas
beyond the horizon.

Best regards, Richard Harrison, KB5WZI

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Old October 10th 04, 10:43 PM
Richard Harrison
 
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Default

Johann wrote:
"A horizontal adjustment would yield better results in DX but not so
good results for near communication, right?"

To reach beyond line-of-sight but not very distant locations, usually
requires a reflection from the ionosphere nearly directtly overhead.

Vertical antennas tend to have a null directly overhead and tend to
behave poorly for areas beyond line-of-sight that require an ionospheric
reflection nearly overhead.

Low horizontal wires radiate substantial energy as antennas at high
angles to the horizon, and thus they are suited to reaching areas
beyond the horizon.

Best regards, Richard Harrison, KB5WZI

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