Full wave antennas for CB

[CB590]

I read the optimal was 17' for counterpoise.. but I had an extra cut to 12' already so I used that. Equal length would be making a dipole antenna..

 

[Marcius E. Chester]

I read the optimal was 17' for counterpoise.. but I had an extra cut to 12' already so I used that. Equal length would be making a dipole antenna..

I decided to experiment with the 9.1unun attached a 18g 30' wire in a sloper configuration. I mounted it 30' up in a tree infront of my building and attached a 30' counterpoise wire to the bottom of the matchbox. Up 12' off the ground perpendicular to the antenna in a downward direction. Conditions weren't that good today but I was able to qso with operator's in Northern California/Seattle, WA/ Arizona. My swr went from 1.2.1to 1.0.1on the atu which helped with Ft-101e. Looking forward to seeing how better it will work when conditions get better.

 

[kopcicle]

Seattle? Frequency?

 

[Marcius E. Chester]

Seattle? Frequency?

The frequency is 38.350 mhz

 

[CB590]

The frequency is 38.350 mhz

Sure you don't mean 3.8350 MHz (aka 80m)..

The other isn't a ham band..

 

[Marcius E. Chester]

Sure you don't mean 3.8350 MHz (aka 80m)..

The other isn't a ham band..

38 lower side band on cb. Without having my license I would get into a world of trouble if I made qso's on 80 meters or any other amateur radio frequency. I like listening alot but won't do it. I use my knowledge/experience/wisdom from my mentor that was an aide to president truman and fellow member's of amateur radio fraternity on 11 meter band until I get my license.

 

[kopcicle]

27.385
Let me know the next time you can hear my neighbors .
I'll toss something in line .

 

[Road Squawker]

I read the optimal was 17' for counterpoise.. but I had an extra cut to 12' already so I used that. Equal length would be making a dipole antenna..

Not really, equal lengths (44/44) would make it a center fed di-pole.

what you have is a di-pole antenna fed at about 12/44 of its overall length... about 27% , ..... an OCF antenna.

the 17/44 number comes from the "approx" method of feeding OCF's at about 1/3 (17/44 = 38.6%)

 

[kopcicle]

and we're back to https://www.w8ji.com/windom_off_center_fed.htm

 

[Marcius E. Chester]

Sure you don't mean 3.8350 MHz (aka 80m)..

The other isn't a ham band..

I meant to say 27.385 mhz.

 

[Marcius E. Chester]

Not really, equal lengths (44/44) would make it a center fed di-pole.

what you have is a di-pole antenna fed at about 12/44 of its overall length... about 27% , ..... an OCF antenna.

the 17/44 number comes from the "approx" method of feeding OCF's at about 1/3 (17/44 = 38.6%)

My end fed wire antenna is 30' long with a 30' counterpoise. It's working good so far. Do you think putting another 30' to the atu ground post will help improve its radiation any better?

 

[Marcius E. Chester]

27.385
Let me know the next time you can hear my neighbors .
I'll toss something in line .

I'm listening right now on 27.383.5 mhz and station's are going in from Seattle, Wa/Oregon/Northern Ca/Arizona/New Mexico.

 

[Marcius E. Chester]

27.385
Let me know the next time you can hear my neighbors .
I'll toss something in line .

Plus Montana.

 

[Marcius E. Chester]

Not really, equal lengths (44/44) would make it a center fed di-pole.

what you have is a di-pole antenna fed at about 12/44 of its overall length... about 27% , ..... an OCF antenna.

the 17/44 number comes from the "approx" method of feeding OCF's at about 1/3 (17/44 = 38.6%)

I'm thinking about attaching 3-30' counterpoise wires on the bottom of my 9.1 unun matchbox transformer that's approximately 15' above ground. I have a 29' sloper wire antenna up 35' in a tree. The counterpoise wire will hang down at a 45 degree angle underneath it. Do you think this setup will improve the antenna's performance?
Any help would be greatly appreciated.

 

[164 northern cal]

I just bought a full wave dipole off ebay. I live in the woods inland of the North coast of Northern Cal. I have a Antron 99 with radials at about 80 feet high in a topped out tree. I am going to lay the dipole horizontally at about 80-100 feet of the ground. I live in a hole in the forest surrounded by Doug Fir trees. I am going to try the dipole facing North to South. I have a Rohn RG-25 70' Tower with a 3 element beam on a rotor. I have not installed this yet. I am waiting to get my Ham Lic. before I do the install. I may build a beam for the 2 meter band. My 3 element beam is hand built and is vertical and horizontal. I think I should hit Eureka Ca. no problem. I just need a directional beam like the old days.