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Homemade CB antenna radials question

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  #9  
Old 08-28-2009, 03:33 PM
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That would sort of complicate getting the radials outside of the pipe, but should work. Or, how about just making a 'sleeve' dipole instead of that groundplane and putting the whole thing inside the PVC? A 'sleeve' dipole benefits from having a choke at the bottom of it.
- 'Doc

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Old 08-28-2009, 04:08 PM
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How would I go about building that? (my hardware store closes in 2 hours about, need to know so I can run over there)

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Old 08-28-2009, 06:33 PM
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A 'sleeve' dipole is about as simple as it gets. Remove the outer insulation from about 9 feet of coax. Sort of push the braid down and over it's self (turn it inside out) until there's about 9 feet of it down the coax from where the center conductor and insulation extends above it. So you end up with the coax feed line running up through one 'side' of the dipole to the center, where the center conductor and insulation make the other half of that dipole. Sort of like;

---////-======o................ (Great graphics, huh?)

That "---" is the coax, the "////" is the coaxial choke, the "o" the center of the dipole, and the "............" the center conductor.
That 'about 9 feet long' on each side of center is too long, but allows some 'extra' for making a loop to hang the thing from, and you trim the rest to the right length like normal. Keep both sides the same length. A good thing to do is seal that place where the braid turns back from the center conductor, don't want water getting in there. figure about 18 feet of coax as the minimum length required. A PL-259 on the end of it, a double female and then the feed line to where ever it's going. That doesn't include the choke, just wind it in the feed line.
- 'Doc


(Just hang the flag from the PVC containing the antenna.)

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Old 08-28-2009, 09:22 PM
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Done. I'll grab some pictures for ya'll tomorrow. It seems my camera decided to NOT work at the most unwelcomed time...

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Old 08-29-2009, 03:17 PM
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i think this is what doc is talking about .
http://www.iw5edi.com/ham-radio/?the...oka-antenna,18
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Old 08-29-2009, 05:04 PM
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Booty',
I have to admit that that 'vertical bazooka' is made like a 'sleeve' dipole, but I'm sure you can see a difference or two.
Never heard of it being called a 'vertical bazooka' before, and since it isn't fed the same way a bazooka antenna is fed, I wonder why? How about an 'OCF Vertical Bazooka', since the two 'parts' to the thing aren't the same length, and it's certainly not a 'balanced' antenna anymore. I think it would still benefit from putting a choke at the bottom of it.
- 'Doc

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Old 08-29-2009, 05:22 PM
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my bad , thanks for the correction doc.
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Old 08-29-2009, 09:09 PM
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Alright here we go, (had to use the camera phone)


$15 bucks at my local hardware store, Gonna paint it in brown/green camo. each of the 4 braces are 5 foot long about, the first length of 1" verticle is 5 feet, next length of 3/4" is 2 feet and the last length of 1/2" is 2 foot also. The junction is just a 1 inch 4-way piece of PVC with a small piece of 1" to a T with the vert. aiming up (in which the mast inserts upwards into). At the top of the 1/2" is a end cap with hole drilled in it for the coax center to go through. This thing was handling 16 MPH winds easily today, also, the erm..."flag" sit perfect height on it.

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