Build your own antenna

[Kyradio]

Building your own CB antenna is more fun and useful than commercial antennas. If you have some thick copper wire and cut 2 pieces 17 foot(1/2 wave) connected in center on plexiglass with a coax center connected to one side shield to other and atleast 18 feet of coax to radio. You'll find Swr to read at 1.3:1 to less than 2.1:1 all around the band. Now you're on the air an ready for some local talking an some Dx contacts around the world..Remember formula 234/Frequency equals Length.(1/4 wave) It comes to 8.67 feet but for Inverted wire antennas you take off 5%. It could be 8.5 ft(102 inches). Either 1/4 wave or the longer 1/2 wave will do the trick to get suitable 1.3 swr. Try to build your own. Verticals are simply 103 inches 8.6 ft for 1/4 or 17.25 ft for 1/2 wave. The 1/2 or 5/8 wave doesnt need ground planes as short antennas will.The 5/8 wave may be 21.5 feet.

 

[ND88]

ok, thanks for the tip bud.

 

[camaro1]

I think you should do a little more research on antenna building!! almost everything you posted is wrong

 

[RatsoW8]

Welcome to the forums. Don't just cut and paste...tell us something about yourself and what part of the radio hobby you like.

 

[wavrider]

I think you should do a little more research on antenna building!! almost everything you posted is wrong

Really? formulas looked correct.

VSWR I can not say as every installation is different but they are in the ball park.

Could have mentioned an rf choke or 1:1 current Balun at the feed point but some will say that is not necessary, matter of personal opinion.

So exactly what is not correct? Just curious.op:

 

[camaro1]

Building your own CB antenna is more fun and useful than commercial antennas. If you have some thick copper wire and cut 2 pieces 17 foot(1/2 wave) connected in center on plexiglass with a coax center connected to one side shield to other and atleast 18 feet of coax to radio. You'll find Swr to read at 1.3:1 to less than 2.1:1 all around the band. Now you're on the air an ready for some local talking an some Dx contacts around the world..Remember formula 234/Frequency equals Length.(1/4 wave) It comes to 8.67 feet but for Inverted wire antennas you take off 5%. It could be 8.5 ft(102 inches). Either 1/4 wave or the longer 1/2 wave will do the trick to get suitable 1.3 swr. Try to build your own. Verticals are simply 103 inches 8.6 ft for 1/4 or 17.25 ft for 1/2 wave. The 1/2 or 5/8 wave doesnt need ground planes as short antennas will.The 5/8 wave may be 21.5 feet.

If you have some thick copper wire and cut 2 pieces 17 foot(1/2 wave) connected in center

2 PIECES 17' WOULD MAKE A FULL WAVE ANTENNA maybe this is just the way he worded it because it sounds like he wants you to cut 2 pieces 17' (1/2 wave) long


Verticals are simply 103 inches 8.6 ft for 1/4 or 17.25 ft for 1/2 wave. The 1/2 or 5/8 wave doesnt need ground planes as short antennas will.The 5/8 wave may be 21.5 feet

verticals are simple?? the 1/4 wave is simple with some ground radials but how do you make a 1/2 or 5/8 vertical wave simple,, you still need a ground plane and some type of matching network,, he is making it sound like you just cut a 1/2 or 5/8 wave section of wire and hook up your coax

you can make a 1/2 wave wire j-pole but you still need a 1/4 wave of twin lead to make your matching network and a coax choke

you can make a 5/8 wave wire gainmaster, and that still requires a matching stub and capacitor in the center and a coax choke at the bottom

Either 1/4 wave or the longer 1/2 wave will do the trick to get suitable 1.3 swr

I don't even know what antenna design he is referring to about this??

 

[w9cll]

Personally I have more issue with the op first post being on how to make an antenna then being wrong.

 

[RatsoW8]

There were a couple odd posts today by new users. Could just be a spammer testing the waters with bogus accounts.


Sent from my iPhone using Tapatalk

 

[medic18d]

awe hell he is just trying to make a good first impression .


lets try not to lynch a guy on how he builds an antenna , hell it might of worked for him.

to the op its better to introduce your self on the forum before putting up knowledge .
and FOR SURE double check your post for errors. people aren't as friendly on the internet as they are in person . please take it with a grain of salt .
Do you have pictures of this antenna ? and welcome to the forum.

 

[HomerBB]

Welcome to the forum

 

[loosecannon]

this is a weird thread.

check the profile; kyradio has not been logged in to the forum since he made that post.

which most likely means that this is a troll thread, and we are all taking the bait.

although i dont understand where the personal satisfaction of the OP comes from if this is the case.

my first thought was that it was a kid who was just discovering CB radio, but the age on the profile says 42. could be a fib. who knows.

one thing's for sure; there is no point in further discussion of antennas in this thread without any posts from the OP.

my guess is that there wont be any.
LC